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.

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

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

Smooth-Cast 300, Bright White, Ultra Low Viscosity Liquid, 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

🎨Bright white, paintable finish

⏱️10-min cure time

R$609

Duties & taxes included

In stock

Sold byAmazon BrazilDelivered 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 Brazil.

Secure transaction

Description

⚡ Cast fast, shine bright—your next masterpiece awaits!

ULTRA FAST CASTING - Get flawless molds ready in just 10 minutes—speed your creative flow without compromise.
DURABLE MACHINABLE - Shore 70D hardness means your creations can be drilled, sanded, and painted to perfection.
BUBBLE FREE PRECISION - Ultra-low viscosity lets air escape naturally, delivering smooth, professional-grade results every time.
EFFORTLESS 1 1 MIXING - No fancy tools needed—just equal parts for consistent, reliable castings that impress.
VERSATILE COMPATIBILITY - Works seamlessly with silicone molds and multiple materials—ideal for pros, makers, and trendsetters alike.

Smooth-Cast 300 is a bright white, ultra-low viscosity two-part polyurethane resin designed for rapid, bubble-free castings. With a quick 3-minute pot life and 10-minute cure time, it produces durable, machinable parts with a Shore 70D hardness. Its easy 1:1 mix ratio and compatibility with silicone molds make it a top choice for professionals and hobbyists seeking high-quality, detailed results.

Specifications

ASIN	B004BN7G0E
Best Sellers Rank	#10,621 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #106 in Sculpture Molding & Casting Products
Brand Name	Smooth-On
Compatible Material	Glass, Metal, Plastic, Stone, Wood
Customer Reviews	4.7 4.7 out of 5 stars (1,319)
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
Manufacturer	Smooth-On, Inc.
Material Type	Plastic
Model	47641
Number of Items	1
Part Number	47641
UPC	751635476417
Unit Count	1 Count

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

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.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

R$609

Duties & taxes included

In stock

Sold byAmazon BrazilDelivered 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 Brazil.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

View all Trustpilot reviews