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.

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.

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.

Is this a silicone or a urethane?

This is a urethane casting resin.

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Smooth-Cast 300 - Bright White, Ultra Low Viscosity Liquid Plastic - Pint Unit

Product ID: 1871175

Details

Brand
Smooth-On
Grit Material
Plastic
Grit Type
Fine
Item dimensions L x W x H
7.4 x 6 x 3.1
Material
Plastic

⏳3 min pot life, 10 min cure

⚡Ultra-low 80 cps viscosity

🎨Bright white, paint-ready finish

₩96596

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Description

⚡ Cast fast, cast flawless — be the maker everyone envies!

DURABLE VERSATILE - Shore 70D hardness ensures tough, machinable, and paintable castings
SPEED MEETS PRECISION - Quick 3-minute pot life and 10-minute demold time to keep projects moving
BRIGHT WHITE BRILLIANCE - Ultra-clear bright white resin enhances detail and aesthetics
PERFECT MIX EVERY TIME - 1:1 volume ratio simplifies preparation and reduces waste
EFFORTLESS BUBBLE FREE CASTS - No vacuum degassing needed for flawless results

Smooth-Cast 300 is a professional-grade, ultra-low viscosity liquid plastic resin that delivers bright white, bubble-free castings without vacuum degassing. With a convenient 1:1 mix ratio, a rapid 3-minute pot life, and a 10-minute cure time, it produces durable, machinable, and paint-ready parts with a Shore 70D hardness, perfect for high-detail artistic and industrial applications.

Specifications

ASIN	B004BN7G0E
Best Sellers Rank	#13,380 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #128 in Sculpture Molding & Casting Products
Brand	Smooth-On
Brand Name	Smooth-On
Compatible Material	Glass, Metal, Plastic, Stone, Wood
Customer Reviews	4.7 out of 5 stars 1,318 Reviews
Grit Material	Plastic
Grit Material Type	Plastic
Grit Number	300
Grit Type	Fine
Item Dimensions	7.4 x 6 x 3.1 inches
Item Type Name	Casting Resin
Item Weight	2 Pounds
Item dimensions L x W x H	7.4 x 6 x 3.1 inches
Manufacturer	Smooth-On, Inc.
Material	Plastic
Material Type	Plastic
Model	47641
Number of Items	1
Part Number	47641
UPC	751635476417
Unit Count	1.0 Count

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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₩96596

Duties & taxes included

In stock

Sold byAmazon South KoreaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Korea.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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