---
product_id: 738028238
title: "Smooth-On Smooth-Cast 300 Liquid Plastic Compound Smooth-Cast 300 by Smooth-On, Inc."
brand: "smooth-on"
price: "$75.74"
currency: USD
in_stock: false
url: https://www.desertcart.ec/products/738028238-smooth-on-smooth-cast-300-liquid-plastic-compound-smooth-cast
store_origin: EC
region: Ecuador
---

# Fast 5-min cure time Precise 2-pint kit volume High strength plastic Smooth-On Smooth-Cast 300 Liquid Plastic Compound Smooth-Cast 300 by Smooth-On, Inc.

**Brand:** smooth-on
**Price:** $75.74
**Availability:** ❌ Out of Stock

## Summary

> ⚡ Mold your ideas fast, mold your future faster!

## Quick Answers

- **What is this?** Smooth-On Smooth-Cast 300 Liquid Plastic Compound Smooth-Cast 300 by Smooth-On, Inc. by smooth-on
- **How much does it cost?** $75.74 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/738028238-smooth-on-smooth-cast-300-liquid-plastic-compound-smooth-cast)

## Best For

- smooth-on enthusiasts

## Why This Product

- Trusted smooth-on brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact & Portable:** Lightweight 907g kit fits easily into any workspace or on-the-go setup.
- • **Rapid 5-Minute Cure:** Get professional-grade results in record time—no more waiting around.
- • **Optimized 2-Pint Kit:** Ideal volume for precise projects without waste or excess.
- • **Multicolor Versatility:** Add a splash of creativity with vibrant, multicolor options.
- • **Durable High-Strength Plastic:** Engineered for toughness, perfect for prototypes and durable parts.

## Overview

Smooth-On Smooth-Cast 300 is a 2-pint liquid plastic compound designed for rapid 5-minute curing and high-strength durability, perfect for professionals seeking quick, reliable molding solutions in a compact, multicolor kit.

## Description

Easy 1:1 ratio; Can be sanded, primed and painted; Quick cure time; 2 pint kit

## Features

- Smooth-On Smooth-Cast 300 Liquid Plastic Compound Smooth-Cast 300
- 2 pint kit

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Part number | 47641 |
| Item Weight | 907 g |
| Product Dimensions | 18.8 x 15.24 x 7.87 cm; 907.18 g |
| Is Discontinued By Manufacturer | No |
| Color | multicolor |
| Material | Plastic |
| Grit Rating | 300 |
| Batteries Included | No |
| Batteries Required? | No |
| Item Dimensions LxWxH | 18.8 x 15.2 x 7.9 cm |

## Product Details

- **Material:** Plastic
- **Item dimensions L x W x H:** 18.8 x 15.2 x 7.9 cm
- **Brand:** Smooth-On
- **Item Weight:** 907 g
- **Grit Number:** 300

## Images

![Smooth-On Smooth-Cast 300 Liquid Plastic Compound Smooth-Cast 300 by Smooth-On, Inc. - Image 1](https://m.media-amazon.com/images/I/81gwmekNnqL.jpg)
![Smooth-On Smooth-Cast 300 Liquid Plastic Compound Smooth-Cast 300 by Smooth-On, Inc. - Image 2](https://m.media-amazon.com/images/I/71ZWTS1-Q2L.jpg)
![Smooth-On Smooth-Cast 300 Liquid Plastic Compound Smooth-Cast 300 by Smooth-On, Inc. - Image 3](https://m.media-amazon.com/images/I/81ubKEjBDDL.jpg)
![Smooth-On Smooth-Cast 300 Liquid Plastic Compound Smooth-Cast 300 by Smooth-On, Inc. - Image 4](https://m.media-amazon.com/images/I/71Koo4ru1vL.jpg)
![Smooth-On Smooth-Cast 300 Liquid Plastic Compound Smooth-Cast 300 by Smooth-On, Inc. - Image 5](https://m.media-amazon.com/images/I/71LJ0Lk-VZL.jpg)

## Questions & Answers

**Q: Can I add glitter to this?**
A: 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?**
A: 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 it machinable?**
A: 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.

**Q: Is this a silicone or a urethane?**
A: This is a urethane casting resin.

## 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

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**Shop now:** [https://www.desertcart.ec/products/738028238-smooth-on-smooth-cast-300-liquid-plastic-compound-smooth-cast](https://www.desertcart.ec/products/738028238-smooth-on-smooth-cast-300-liquid-plastic-compound-smooth-cast)

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*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-03-07*