---
product_id: 221210804
title: "Smooth-Cast 300 Liquid Plastic Compound - Trial Unit"
brand: "smooth-on"
price: "฿8690"
currency: THB
in_stock: true
url: https://www.desertcart.co.th/products/221210804-smooth-cast-300-liquid-plastic-compound-trial-unit
store_origin: TH
region: Thailand
---

# Smooth-Cast 300 Liquid Plastic Compound - Trial Unit

**Brand:** smooth-on
**Price:** ฿8690
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** Smooth-Cast 300 Liquid Plastic Compound - Trial Unit by smooth-on
- **How much does it cost?** ฿8690 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/221210804-smooth-cast-300-liquid-plastic-compound-trial-unit)

## 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

## 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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| 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 | 2 Pounds |
| Grit Number | 300 |
| UPC | 751635476417 |
| Manufacturer | smooth |
| Shipping Weight | 1.06 Kilograms |
| Item Model Number | 47641 |
| Item Part Number | 47641 |
| Primary material | Plastic |
| Country of Origin | USA |

## Product Details

- **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

## Images

![Smooth-Cast 300 Liquid Plastic Compound - Trial Unit - Image 1](https://m.media-amazon.com/images/I/81gwmekNnqL.jpg)
![Smooth-Cast 300 Liquid Plastic Compound - Trial Unit - Image 2](https://m.media-amazon.com/images/I/71ZWTS1-Q2L.jpg)
![Smooth-Cast 300 Liquid Plastic Compound - Trial Unit - Image 3](https://m.media-amazon.com/images/I/81ubKEjBDDL.jpg)
![Smooth-Cast 300 Liquid Plastic Compound - Trial Unit - Image 4](https://m.media-amazon.com/images/I/71Koo4ru1vL.jpg)
![Smooth-Cast 300 Liquid Plastic Compound - Trial Unit - 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.co.th/products/221210804-smooth-cast-300-liquid-plastic-compound-trial-unit](https://www.desertcart.co.th/products/221210804-smooth-cast-300-liquid-plastic-compound-trial-unit)

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-02-21*