---
product_id: 254560414
title: "Smooth-On Mould Star 20T Silicone Mould Making Rubber - Trial Unit"
brand: "smooth-on"
price: "AR$298532"
currency: ARS
in_stock: true
category: "Smooth On"
url: https://www.desertcart.com.ar/products/254560414-smooth-on-mould-star-20t-silicone-mould-making-rubber-trial
store_origin: AR
region: Argentina
---

# Heat resistant up to 450°F (232°C) Fast demold in 30 minutes 1:1 volume mix ratio, no scale needed Smooth-On Mould Star 20T Silicone Mould Making Rubber - Trial Unit

**Brand:** smooth-on
**Price:** AR$298532
**Availability:** ✅ In Stock

## Summary

> ✨ Mold like a pro, cast like a visionary! ⚡

## Quick Answers

- **What is this?** Smooth-On Mould Star 20T Silicone Mould Making Rubber - Trial Unit by smooth-on
- **How much does it cost?** AR$298532 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/254560414-smooth-on-mould-star-20t-silicone-mould-making-rubber-trial)

## 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

- • **High-Heat Endurance:** Withstands temperatures up to 450°F, ideal for demanding casting projects.
- • **Rapid Turnaround Time:** Demold your masterpiece in just 30 minutes—speed up your creative workflow.
- • **Durable & Tear-Resistant:** Soft yet strong silicone rubber that withstands repeated use without cracking or shrinking.
- • **Effortless Precision Mixing:** Mix 1A:1B by volume—no weighing scale required, saving you time and hassle.
- • **Versatile Casting Compatibility:** Perfect for wax, gypsum, resins, concrete, and even low-temp metal alloys.

## Overview

Smooth-On Mould Star 20T is a translucent platinum-cure silicone rubber with a 1:1 volume mix ratio, offering fast 30-minute demold times and heat resistance up to 450°F. Its low viscosity and tear-resistant properties make it ideal for durable, high-quality molds compatible with a wide range of casting materials, perfect for professionals seeking reliable, efficient mold-making solutions.

## Description

Mold Star rubbers are easy to use platinum silicones which are mixed 1A:1B by volume (no weighing scale necessary). Mold Star silicones feature relatively low viscosities and vacuum degassing is not required for most applications. Mold Star silicones cure to soft, strong rubbers which are tear resistant and exhibit very low long term shrinkage. Molds made with Mold Star will last a long time in your mold library and are good for casting wax, gypsum, resins, concrete and other materials. Cured Mold Star rubber is heat resistant up to 450°F (232°C) and is suitable for casting low-temperature melt metal alloys. Note: THI-VEX is NOT compatible with Mold Star rubbers. MOLD STAR 20T: MIX RATIO: 1:1 by volume; POT LIFE: 6 minutes; DEMOLD TIME: 30 minutes; SHORE A: 20; COLOR: Transparent Read the MSDS before using. Consult the Technical Bulletin for further information or visit us at www.smooth-on.com

## Features

- Packaging may vary Pourable translucent platinum-cure silicone rubber with Shore 20A Hardness

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00LU4YFK6 |
| Brand Name | Smooth-On |
| Color | Multicolor |
| Customer Reviews | 4.6 4.6 out of 5 stars (714) |
| Item Dimensions | 15 x 14.7 x 8.1 centimeters |
| Item Weight | 2.4 Pounds |
| Manufacturer | Smooth-On Inc |
| Manufacturer Part Number | 3573423 |
| Material Type | Silicone Rubber Metal |
| Model Number | 3573423 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Number of Pieces | 1 |
| Shape | Star |
| UPC | 751635587410 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Smooth-On
- **Colour:** Multicolor
- **Item dimensions L x W x H:** 15 x 14.7 x 8.1 centimeters
- **Material:** Silicone Rubber Metal
- **Shape:** Star

## Images

![Smooth-On Mould Star 20T Silicone Mould Making Rubber - Trial Unit - Image 1](https://m.media-amazon.com/images/I/41xzlWAcZTL.jpg)
![Smooth-On Mould Star 20T Silicone Mould Making Rubber - Trial Unit - Image 2](https://m.media-amazon.com/images/I/41-LZ1nC3uL.jpg)
![Smooth-On Mould Star 20T Silicone Mould Making Rubber - Trial Unit - Image 3](https://m.media-amazon.com/images/I/41gWCuJcRWL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: What size does this make**
A: This kit will yield 51.2 cubic inches of material.

**Q: what's the difference between this mold star and the 16 fast?**
A: This version has no color - it is cloudy clear.

**Q: Will different silicones stick together when making a mold? I ran out so part of my mold is cured?**
A: You should be fine with using other silicones if you use a silicone release spray when you create your mold. Something like "Smooth-On Universal Mold Release" would be sufficient.

**Q: Been wanting to try this. Is there a step by step tutorial before I buy it ?**
A: Yes, if your looking for tutorial videos, go to https://www.smooth-on.com/tutorials/ to learn about the many different mold making techniques.

## Frequently Bought Together

- Mold Star 20T - 1A:1B Mix by Volume Translucent Platinum Silicone Rubber - Pint Unit
- Smooth-On Universal™ Mold Release Spray, 14 fl. oz. Aerosol Can
- Smooth-On - Smooth-Cast™ 65D Semi-Rigid Urethane Casting Resin - Trial Size Unit

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**Shop now:** [https://www.desertcart.com.ar/products/254560414-smooth-on-mould-star-20t-silicone-mould-making-rubber-trial](https://www.desertcart.com.ar/products/254560414-smooth-on-mould-star-20t-silicone-mould-making-rubber-trial)

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*Product available on Desertcart Argentina*
*Store origin: AR*
*Last updated: 2026-08-25*