Making Molds for Fiberglass Casting

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you can hey guys I’m Nate with the king of

hey guys I’m Nate with the king of

hey guys I’m Nate with the king of random and today we are going to show

random and today we are going to show

random and today we are going to show you how to make a custom mold on the

you how to make a custom mold on the

you how to make a custom mold on the Mario Kart shells that we made in our

Mario Kart shells that we made in our

Mario Kart shells that we made in our last video previously we showed you how

last video previously we showed you how

last video previously we showed you how to take a rigid insulation foam build it

to take a rigid insulation foam build it

to take a rigid insulation foam build it up and carve it into a custom design

up and carve it into a custom design

up and carve it into a custom design from your favorite video game or movie

from your favorite video game or movie

from your favorite video game or movie we want to make these props more

we want to make these props more

we want to make these props more permanently out of fiberglass and the

permanently out of fiberglass and the

permanently out of fiberglass and the first step to doing that is to make a

first step to doing that is to make a

first step to doing that is to make a custom silicone mold so the purpose of

custom silicone mold so the purpose of

custom silicone mold so the purpose of today’s video is to learn how to make a

today’s video is to learn how to make a

today’s video is to learn how to make a mold on these Mario Kart shells remember

mold on these Mario Kart shells remember

mold on these Mario Kart shells remember that these steps don’t only apply to

that these steps don’t only apply to

that these steps don’t only apply to Mario Kart shells the same principles

Mario Kart shells the same principles

Mario Kart shells the same principles will work on just about any shape you’ve

will work on just about any shape you’ve

will work on just about any shape you’ve got in the last video we showed how to

got in the last video we showed how to

got in the last video we showed how to prep our foam by using a layer of latex

prep our foam by using a layer of latex

prep our foam by using a layer of latex house paint and then spackling to fill

house paint and then spackling to fill

house paint and then spackling to fill in any gaps or cracks in the foam now

in any gaps or cracks in the foam now

in any gaps or cracks in the foam now before we start adding the rubber let’s

before we start adding the rubber let’s

before we start adding the rubber let’s quickly add a layer of spray paint to

quickly add a layer of spray paint to

quickly add a layer of spray paint to smooth everything down the latex house

smooth everything down the latex house

smooth everything down the latex house paint makes it so that we’ll be able to

paint makes it so that we’ll be able to

paint makes it so that we’ll be able to remove the silicone mold more easily but

remove the silicone mold more easily but

remove the silicone mold more easily but it also creates a barrier that lets us

it also creates a barrier that lets us

it also creates a barrier that lets us cover the shell in spray paint otherwise

cover the shell in spray paint otherwise

cover the shell in spray paint otherwise the paint could melt the foam

the paint could melt the foam

the paint could melt the foam [Music]

[Music]

[Music] our spray paint has dried I’m gonna set

our spray paint has dried I’m gonna set

our spray paint has dried I’m gonna set the shell in this bowl to hold it steady

the shell in this bowl to hold it steady

the shell in this bowl to hold it steady now let’s mix up some silicone all right

now let’s mix up some silicone all right

now let’s mix up some silicone all right we’ve got six ounces of silicone so we

we’ve got six ounces of silicone so we

we’ve got six ounces of silicone so we need to add one tenth of that for the

need to add one tenth of that for the

need to add one tenth of that for the catalyst that will be point six ounces

[Applause]

[Applause] we’ve got the catalyst added to the

we’ve got the catalyst added to the

we’ve got the catalyst added to the silicone now let’s mix it up and paint

silicone now let’s mix it up and paint

silicone now let’s mix it up and paint it onto our shell

it onto our shell

it onto our shell [Music]

[Music]

[Music] there we go our first layer of silicone

there we go our first layer of silicone

there we go our first layer of silicone is painted on you can see it I’ve only

is painted on you can see it I’ve only

is painted on you can see it I’ve only covered about half the shell my plan is

covered about half the shell my plan is

covered about half the shell my plan is I’m gonna build up three layers of

I’m gonna build up three layers of

I’m gonna build up three layers of silicone on one side flip it over and

silicone on one side flip it over and

silicone on one side flip it over and then paint on the other side the

then paint on the other side the

then paint on the other side the silicone actually bonds to itself

silicone actually bonds to itself

silicone actually bonds to itself extremely well so when I paint it on the

extremely well so when I paint it on the

extremely well so when I paint it on the other side and let it overlap with the

other side and let it overlap with the

other side and let it overlap with the first layers it will glue itself

first layers it will glue itself

first layers it will glue itself together into one continuous piece the

together into one continuous piece the

together into one continuous piece the first layer of our silicone has now

first layer of our silicone has now

first layer of our silicone has now cured so let’s mix up the next one this

cured so let’s mix up the next one this

cured so let’s mix up the next one this stuff gets everywhere since this isn’t

stuff gets everywhere since this isn’t

stuff gets everywhere since this isn’t the first layer I actually want to make

the first layer I actually want to make

the first layer I actually want to make the silicone a little bit thicker so I

the silicone a little bit thicker so I

the silicone a little bit thicker so I have here a clear gel that’s called

have here a clear gel that’s called

have here a clear gel that’s called pixiv tropic and it’s extremely powerful

pixiv tropic and it’s extremely powerful

pixiv tropic and it’s extremely powerful just about one drop of this will make

just about one drop of this will make

just about one drop of this will make the silicone much thicker almost like

the silicone much thicker almost like

the silicone much thicker almost like peanut butter or mayonnaise

there we have it layer number two is

there we have it layer number two is applied and it’s lot thicker than the

applied and it’s lot thicker than the

applied and it’s lot thicker than the first layer let’s let back here and then

first layer let’s let back here and then

first layer let’s let back here and then add one more I’ve upgraded to a larger

add one more I’ve upgraded to a larger

add one more I’ve upgraded to a larger cut because I was almost spilling it

cut because I was almost spilling it

cut because I was almost spilling it before

before

before [Music]

the third layer of silicone is cured and

the third layer of silicone is cured and it’s ready to flip it over and paint

it’s ready to flip it over and paint

it’s ready to flip it over and paint silicone on the other side before I

silicone on the other side before I

silicone on the other side before I start adding silicone really quickly I’m

start adding silicone really quickly I’m

start adding silicone really quickly I’m just going to cut off these excess drips

just going to cut off these excess drips

just going to cut off these excess drips sticking up last time I used six ounces

sticking up last time I used six ounces

sticking up last time I used six ounces on the first layer and I had a little

on the first layer and I had a little

on the first layer and I had a little bit left over so I’m just going to start

bit left over so I’m just going to start

bit left over so I’m just going to start with five ounces this time

with five ounces this time

with five ounces this time [Music]

this right here is a piece of cured

this right here is a piece of cured silicone that we’re going to cut in half

silicone that we’re going to cut in half

silicone that we’re going to cut in half and attach as a sort of belt that goes

and attach as a sort of belt that goes

and attach as a sort of belt that goes all the way around the ridge on the

all the way around the ridge on the

all the way around the ridge on the shelf this piece was originally made by

shelf this piece was originally made by

shelf this piece was originally made by pouring silicone into a mold that was

pouring silicone into a mold that was

pouring silicone into a mold that was made by attaching four slats to a flat

made by attaching four slats to a flat

made by attaching four slats to a flat surface to make it a better size for how

surface to make it a better size for how

surface to make it a better size for how we’re going to use it I’m going to cut

we’re going to use it I’m going to cut

we’re going to use it I’m going to cut it in half lengthwise with a razor blade

now let’s mix up a really thick batch of

now let’s mix up a really thick batch of the silicone to use as glue to attach

the silicone to use as glue to attach

the silicone to use as glue to attach these other pieces of silicone to the

these other pieces of silicone to the

these other pieces of silicone to the side of the shell normally we would add

side of the shell normally we would add

side of the shell normally we would add point eight ounces of catalyst but I’m

point eight ounces of catalyst but I’m

point eight ounces of catalyst but I’m going to add a little bit extra so it

going to add a little bit extra so it

going to add a little bit extra so it catalyzes extra quickly and I want this

catalyzes extra quickly and I want this

catalyzes extra quickly and I want this to be extra thick so I’m adding more of

to be extra thick so I’m adding more of

to be extra thick so I’m adding more of the fix of tropic substance than I did

the fix of tropic substance than I did

the fix of tropic substance than I did before now I’m going to use this extra

before now I’m going to use this extra

before now I’m going to use this extra thick silicone to glue this on the

thick silicone to glue this on the

thick silicone to glue this on the purpose of this Ridge is to have a

purpose of this Ridge is to have a

purpose of this Ridge is to have a dividing point to remove the mold after

dividing point to remove the mold after

dividing point to remove the mold after I’m done I’ll cut along this strip of

I’m done I’ll cut along this strip of

I’m done I’ll cut along this strip of silicone and peel the two parts of the

silicone and peel the two parts of the

silicone and peel the two parts of the mold apart this will give us a nice

mold apart this will give us a nice

mold apart this will give us a nice sturdy edge to build up to with our mold

sturdy edge to build up to with our mold

sturdy edge to build up to with our mold jacket and for casting the fiberglass

jacket and for casting the fiberglass

jacket and for casting the fiberglass even once we’re done

even once we’re done

even once we’re done first I’m laying down a nice thick coat

first I’m laying down a nice thick coat

first I’m laying down a nice thick coat of this silicone all along the runner

of this silicone all along the runner

of this silicone all along the runner now I’m going to pick it up and

now I’m going to pick it up and

now I’m going to pick it up and carefully start applying it to the edge

carefully start applying it to the edge

carefully start applying it to the edge of the shell

of the shell

of the shell [Music]

[Music]

[Music] you can see that it’s already starting

you can see that it’s already starting

you can see that it’s already starting to Sag it doesn’t like to stick to the

to Sag it doesn’t like to stick to the

to Sag it doesn’t like to stick to the edge of the shell very well so what

edge of the shell very well so what

edge of the shell very well so what we’re gonna do is use some straight pins

we’re gonna do is use some straight pins

we’re gonna do is use some straight pins to stab through the silicon and hold it

to stab through the silicon and hold it

to stab through the silicon and hold it in place you’ll want to make sure that

in place you’ll want to make sure that

in place you’ll want to make sure that the pins you’re using are longer than

the pins you’re using are longer than

the pins you’re using are longer than the silicon gate is thick to make sure

the silicon gate is thick to make sure

the silicon gate is thick to make sure that it will secure it well to see the

that it will secure it well to see the

that it will secure it well to see the rest of your mold

rest of your mold

rest of your mold [Music]

[Music]

[Music] now I’m just smoothing out the edge of

now I’m just smoothing out the edge of

now I’m just smoothing out the edge of the silicone to fill in all the gaps

the silicone to fill in all the gaps

the silicone to fill in all the gaps this will also help ensure a nice strong

this will also help ensure a nice strong

this will also help ensure a nice strong connection between the strip of silicone

connection between the strip of silicone

connection between the strip of silicone and the rest of your mold I’m measuring

and the rest of your mold I’m measuring

and the rest of your mold I’m measuring how much of this others crypto silicone

how much of this others crypto silicone

how much of this others crypto silicone will need and then I’ll use a razor

will need and then I’ll use a razor

will need and then I’ll use a razor blade to cut it off there

blade to cut it off there

blade to cut it off there [Music]

our turtle mold is starting to look

our turtle mold is starting to look something like a UFO I’ve got a little

something like a UFO I’ve got a little

something like a UFO I’ve got a little bit of a gap between the two so I’ll

bit of a gap between the two so I’ll

bit of a gap between the two so I’ll just fill it in using some of my

just fill it in using some of my

just fill it in using some of my leftover silicone if you have places

leftover silicone if you have places

leftover silicone if you have places where your strip of silicone is pulling

where your strip of silicone is pulling

where your strip of silicone is pulling away from the mold just add more pins

away from the mold just add more pins

away from the mold just add more pins sometimes it can help to drive them in

sometimes it can help to drive them in

sometimes it can help to drive them in at different angles I’ve got a little

at different angles I’ve got a little

at different angles I’ve got a little bit left over of this extra thick

bit left over of this extra thick

bit left over of this extra thick silicone so what I’m gonna do is use it

silicone so what I’m gonna do is use it

silicone so what I’m gonna do is use it to fill in a little bit of the neck of

to fill in a little bit of the neck of

to fill in a little bit of the neck of the turtle shell this will make it

the turtle shell this will make it

the turtle shell this will make it easier for the mold jacket to come on

easier for the mold jacket to come on

easier for the mold jacket to come on and off of the mold now that the

and off of the mold now that the

and off of the mold now that the silicone holding the strip onto the

silicone holding the strip onto the

silicone holding the strip onto the shell is cured it’s time to make a mold

shell is cured it’s time to make a mold

shell is cured it’s time to make a mold jacket the mold jacket is a rigid shell

jacket the mold jacket is a rigid shell

jacket the mold jacket is a rigid shell that we use to help the mold keep its

that we use to help the mold keep its

that we use to help the mold keep its shape as we cast our fiberglass in it

shape as we cast our fiberglass in it

shape as we cast our fiberglass in it will have a wool jacket on either side

will have a wool jacket on either side

will have a wool jacket on either side of the shell which will separate apart

of the shell which will separate apart

of the shell which will separate apart into two dish like shapes we’ll mix our

into two dish like shapes we’ll mix our

into two dish like shapes we’ll mix our plaster of Paris with some water in the

plaster of Paris with some water in the

plaster of Paris with some water in the bowl and then we’ll add some strands of

bowl and then we’ll add some strands of

bowl and then we’ll add some strands of hemp rope to give it strength

hemp rope to give it strength

hemp rope to give it strength technically this rope isn’t made from

technically this rope isn’t made from

technically this rope isn’t made from hemp it’s called Manila rope but it’s

hemp it’s called Manila rope but it’s

hemp it’s called Manila rope but it’s often called hemp because it’s really

often called hemp because it’s really

often called hemp because it’s really similar untwist and separate the rope

similar untwist and separate the rope

similar untwist and separate the rope until you just have the plain fibers cut

until you just have the plain fibers cut

until you just have the plain fibers cut off pieces of the fiber about an inch

off pieces of the fiber about an inch

off pieces of the fiber about an inch long

long

long [Music]

now let’s add plaster tour water and

now let’s add plaster tour water and keep mixing it up until it’s a really

keep mixing it up until it’s a really

keep mixing it up until it’s a really thick consistency almost like dough a

proper mixture has almost two times as

proper mixture has almost two times as much plaster as it does water by volume

much plaster as it does water by volume

much plaster as it does water by volume you can see that the plaster is now

you can see that the plaster is now

you can see that the plaster is now thick enough that it leaves ridges and

thick enough that it leaves ridges and

thick enough that it leaves ridges and marks in it if you run your fingers

marks in it if you run your fingers

marks in it if you run your fingers through it this means we’re getting

through it this means we’re getting

through it this means we’re getting close the plaster is now nice and thick

close the plaster is now nice and thick

close the plaster is now nice and thick so it’s time to start adding the rope

so it’s time to start adding the rope

so it’s time to start adding the rope fibers you want enough for a nice even

fibers you want enough for a nice even

fibers you want enough for a nice even distribution of fiber all throughout the

distribution of fiber all throughout the

distribution of fiber all throughout the plaster these fibers will make the

plaster these fibers will make the

plaster these fibers will make the plaster a lot stronger and a little bit

plaster a lot stronger and a little bit

plaster a lot stronger and a little bit more flexible our plaster is now all

more flexible our plaster is now all

more flexible our plaster is now all mixed up with the rope fibers in it and

mixed up with the rope fibers in it and

mixed up with the rope fibers in it and we have to apply it quickly because we

we have to apply it quickly because we

we have to apply it quickly because we only have a few minutes before it starts

only have a few minutes before it starts

only have a few minutes before it starts to set we want to apply an even layer of

to set we want to apply an even layer of

to set we want to apply an even layer of plaster all over our shell try for about

plaster all over our shell try for about

plaster all over our shell try for about 3/8 of an inch thick the plaster doesn’t

3/8 of an inch thick the plaster doesn’t

3/8 of an inch thick the plaster doesn’t have to reach all the way to the edge of

have to reach all the way to the edge of

have to reach all the way to the edge of the silicone strip but it should overlap

the silicone strip but it should overlap

the silicone strip but it should overlap a little bit this will help with the

a little bit this will help with the

a little bit this will help with the strength of your mold jacket and prevent

strength of your mold jacket and prevent

strength of your mold jacket and prevent cracking use just a little bit of water

cracking use just a little bit of water

cracking use just a little bit of water to smooth down the surface of your mold

to smooth down the surface of your mold

to smooth down the surface of your mold [Music]

[Music]

[Music] once the plaster dries it will be very

once the plaster dries it will be very

once the plaster dries it will be very hard so any ridges left in the plaster

hard so any ridges left in the plaster

hard so any ridges left in the plaster will become sharp and Scratchy we’re

will become sharp and Scratchy we’re

will become sharp and Scratchy we’re finished with this side and as soon as

finished with this side and as soon as

finished with this side and as soon as it’s dry we’ll turn it over and do the

it’s dry we’ll turn it over and do the

it’s dry we’ll turn it over and do the same thing to the other side plaster our

[Music]

[Music] once this piece of plaster is dry it’ll

once this piece of plaster is dry it’ll

once this piece of plaster is dry it’ll be time to remove the two pieces of the

be time to remove the two pieces of the

be time to remove the two pieces of the mold jacket and then cut along the seam

mold jacket and then cut along the seam

mold jacket and then cut along the seam of rubber to remove our mold first look

of rubber to remove our mold first look

of rubber to remove our mold first look pull out all of these pins oh that’s why

pull out all of these pins oh that’s why

pull out all of these pins oh that’s why you should try and grab the wire part of

you should try and grab the wire part of

you should try and grab the wire part of the pin and not the head of the pin so

the pin and not the head of the pin so

the pin and not the head of the pin so that wouldn’t kind of bent going in

that wouldn’t kind of bent going in

that wouldn’t kind of bent going in alright now we have to get under the

alright now we have to get under the

alright now we have to get under the plaster and pry it off there we go there

plaster and pry it off there we go there

plaster and pry it off there we go there we go

we go

we go oh yeah shell of our shell the other

oh yeah shell of our shell the other

oh yeah shell of our shell the other side here we go there we go yeah now we

side here we go there we go yeah now we

side here we go there we go yeah now we have to cut the silicone off by slicing

have to cut the silicone off by slicing

have to cut the silicone off by slicing through the belt attached to the middle

through the belt attached to the middle

through the belt attached to the middle [Music]

all right we’ve cut all the way through

all right we’ve cut all the way through now let’s peel it off there we go there

now let’s peel it off there we go there

now let’s peel it off there we go there we go our mold is removed decide into

we go our mold is removed decide into

we go our mold is removed decide into its mold jacket there we have a

its mold jacket there we have a

its mold jacket there we have a completed turtle shell mold in our last

completed turtle shell mold in our last

completed turtle shell mold in our last video we showed you how to take a block

video we showed you how to take a block

video we showed you how to take a block of foam and carve it into the shape of a

of foam and carve it into the shape of a

of foam and carve it into the shape of a replica movie or video game piece of

replica movie or video game piece of

replica movie or video game piece of your choice I chose this mariokart shell

your choice I chose this mariokart shell

your choice I chose this mariokart shell because I’ve done them before for Devin

because I’ve done them before for Devin

because I’ve done them before for Devin Supertramp and I love the game Mario

Supertramp and I love the game Mario

Supertramp and I love the game Mario Kart today we showed you how to take

Kart today we showed you how to take

Kart today we showed you how to take silicone rubber

silicone rubber

silicone rubber casting plaster and some fibrous rope

casting plaster and some fibrous rope

casting plaster and some fibrous rope and turn that into a mold of your

and turn that into a mold of your

and turn that into a mold of your creation we first coated the whole thing

creation we first coated the whole thing

creation we first coated the whole thing in a few layers of silicone rubber we

in a few layers of silicone rubber we

in a few layers of silicone rubber we added a belt along the middle of it as a

added a belt along the middle of it as a

added a belt along the middle of it as a seam we then took plaster mixed with

seam we then took plaster mixed with

seam we then took plaster mixed with pieces of our fibrous rope and made a

pieces of our fibrous rope and made a

pieces of our fibrous rope and made a shell that went over our silicone mold

shell that went over our silicone mold

shell that went over our silicone mold once both pieces of the plaster were dry

once both pieces of the plaster were dry

once both pieces of the plaster were dry we were able to pry them off of the

we were able to pry them off of the

we were able to pry them off of the silicone mold cut along the belt we had

silicone mold cut along the belt we had

silicone mold cut along the belt we had left on the center and removed the

left on the center and removed the

left on the center and removed the silicone rubber from our masterpiece

silicone rubber from our masterpiece

silicone rubber from our masterpiece again I want to point out that you don’t

again I want to point out that you don’t

again I want to point out that you don’t have to make mariokart shells if you’re

have to make mariokart shells if you’re

have to make mariokart shells if you’re not interested in that you can use these

not interested in that you can use these

not interested in that you can use these same principles on a variety of shapes

same principles on a variety of shapes

same principles on a variety of shapes from whatever game movie or your own

from whatever game movie or your own

from whatever game movie or your own imagination that you want in our next

imagination that you want in our next

imagination that you want in our next video we’re going to show you how to

video we’re going to show you how to

video we’re going to show you how to cast fiberglass in your molds so you can

cast fiberglass in your molds so you can

cast fiberglass in your molds so you can make pieces put them together to clean

make pieces put them together to clean

make pieces put them together to clean it up and paint it to have a finished

it up and paint it to have a finished

it up and paint it to have a finished product thanks for joining us for this

product thanks for joining us for this

product thanks for joining us for this project and we look forward to showing

project and we look forward to showing

project and we look forward to showing you how to finish it up in the next one

you how to finish it up in the next one

you how to finish it up in the next one talk to you then looks like frosting or

talk to you then looks like frosting or

talk to you then looks like frosting or maybe taffy some kind of candy don’t eat

maybe taffy some kind of candy don’t eat

maybe taffy some kind of candy don’t eat it

it

it time for the other side like having

time for the other side like having

time for the other side like having tentacles that they can’t control it

tentacles that they can’t control it

tentacles that they can’t control it hey guys quick reminder that king of

hey guys quick reminder that king of

hey guys quick reminder that king of random t-shirts are available once again

random t-shirts are available once again

random t-shirts are available once again just go ahead and click the link at the

just go ahead and click the link at the

just go ahead and click the link at the top of the description and it’ll take

top of the description and it’ll take

top of the description and it’ll take you to where you can get one today