Yeah, to an extent. I’ve taken a dremle tool to casted plastic to sand down parts and remove unwanted flashing that occurs. It’s pretty tough stuff, let it cure for a day or two before sanding or working on thinner areas, but I’ve even taken a hacksaw to some castings and they have held up just fine.

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Smooth-Cast 300 Liquid Plastic Compound - Trial Unit

Smooth-Cast 300 Liquid Plastic Compound - Trial Unit

Q: Can I add glitter to this?

I've used 325 with glitter pigments, and it works very well. You'll have to add a decent amount of glitter and it will take longer to cure.

Q: Can I use this to cast a dome-shaped mask using a silicone mold? Will it stay liquid long enough for me to tilt it back & forth to form an even coat?

Smooth-Cast 300 is a snap cure material - a better choice may be Smooth-Cast 325 or Smooth-Cast 65D, both of which have a gradual cure profile.

Q: Is this a silicone or a urethane?

This is a urethane casting resin.

Product ID: 221210804

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Details

Material
Plastic
Grit Material
Plastic
Item dimensions L x W x H
18.8 x 15.2 x
Brand
Smooth-On
Grit Type
Fine

Frequently Bought Together

Smooth-Cast™ 300: Bright White, Low Viscosity, Liquid Plastic Casting Resin - Pint Unit

Smooth-On Mold Star™ 16 Fast Platinum Silicone Rubber, Silicone Mold Making Kit - Pint Unit

Smooth-On Universal Mold Release - 14 Fluid Ounce Aerosol Can

Description

Smooth cast 300 is a liquid plastic, ultra-low viscosity casting resin that yields castings that are bright white and virtually bubble-free. Vacuum degassing is not necessary. It gives the convenience of a one to one mix ratio (by vol). 3 Minute pot life: 10 minute demold time: mixed viscocity 80 cps: 70d shore hardness fully cured castings are tough, durable, machinable and paintable.

Specifications

Material	Plastic
Grit Material	Plastic
Item dimensions L x W x H	18.8 x 15.2 x 7.9 Centimeters
Brand	Smooth-On
Grit Type	Fine
Item Weight	907 g
Grit Number	300
UPC	751635476417
Manufacturer	smooth
Shipping Weight	1.06 Kilograms
Item Model Number	47641
Item Part Number	47641
Primary material	Plastic

Have a Question? See What Others Asked

Can I add glitter to this?

Can I use this to cast a dome-shaped mask using a silicone mold? Will it stay liquid long enough for me to tilt it back & forth to form an even coat?

is it machinable?

Is this a silicone or a urethane?

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