---
product_id: 725334922
title: "Mold Star 30 Silicone Mold Making Rubber - Trial Unit by Smooth"
brand: "smooth-on"
price: "€ 9.32"
currency: EUR
in_stock: false
url: https://www.desertcart.ie/products/725334922-mold-star-30-silicone-mold-making-rubber-trial-unit-by
store_origin: IE
region: Ireland
---

# Heat resistant 450°F 45 min pot life 1:1 mix ratio no scale Mold Star 30 Silicone Mold Making Rubber - Trial Unit by Smooth

**Brand:** smooth-on
**Price:** € 9.32
**Availability:** ❌ Out of Stock

## Summary

> 🔥 Mold your masterpiece with ease and precision!

## Quick Answers

- **What is this?** Mold Star 30 Silicone Mold Making Rubber - Trial Unit by Smooth by smooth-on
- **How much does it cost?** € 9.32 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/725334922-mold-star-30-silicone-mold-making-rubber-trial-unit-by)

## 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 Resistance:** Withstands up to 450°F (232°C), perfect for demanding casting projects.
- • **Durable & Tear-Resistant:** Soft yet strong platinum silicone rubber built to last through countless casts.
- • **Effortless Precision Mixing:** Mixes 1A:1B by volume—no scale, no hassle, just perfect every time.
- • **Versatile Casting Compatibility:** Ideal for wax, plaster, resin, concrete, and even low-temp metal alloys.
- • **Fast Curing with Long Working Time:** 45-minute pot life with full cure in 6 hours—work at your pace without rush.

## Overview

Mold Star 30 is a platinum-cured silicone rubber offering a perfect 1:1 volume mix ratio, 45-minute pot life, and 6-hour cure time. With shore hardness of 30A, it delivers a soft yet durable mold that resists tearing and long-term shrinkage. Heat resistant up to 450°F, it supports casting of wax, plaster, resin, concrete, and low-temperature metal alloys, making it a versatile choice for professional mold makers.

## Description

Mold Star rubber is easy to use platinum silicone mixed with volume of 1A:1B (no measuring scale required). Mold Star silicone is relatively low viscosity and requires no vacuum degasing for most applications. Mold Star silicone cures soft and strong rubber. It is tear resistant and has a very low long-term shrinkage. Mold Star molds can be used for a long time in the library of mold and are suitable for casting wax, plaster, resin, concrete and other materials. The hardened mold star rubber is suitable for casting low-temperature fused metal alloys with a heat resistant temperature of 450°F (232°C). NOTE: THI-VEX will NOT fit Mold Star rubber. Mold Star 30: Mix Ratio: 1:1 per volume POT life: 45 minutes Deformed Time: 6 hours Shore A: 30 Color: Green Please read MSDS before use. See Technical Information for more details.

## Features

- Platinum hardened silicone rubber with shore 30A hardness
- 45 minutes Pot life: 6 hours hardening
- Easy to mix: 1A: Mixes at 1B volume (no measuring scale required)
- Suitable for casting wax, plaster, resin, concrete and other materials
- Heat resistant up to 450°F (232°C)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Smooth-On, Inc. |
| Model Number | COMINHKR067156 |
| Package Dimensions | 19.1 x 15.2 x 7.7 cm |
| Color | bule |
| Package Weight | 1.09 Kilograms |
| Batteries Required | No |
| Batteries Included | No |
| Brand Name | Smooth-On |
| Item Weight | 0.59 Kilograms |

## Product Details

- **Color:** bule
- **Brand:** Smooth-On
- **Item dimensions L x W x H:** 19.1 x 15.2 x 7.6 cm
- **Number of Pieces:** 1
- **Manufacturer:** Smooth-On, Inc.

## Images

![Mold Star 30 Silicone Mold Making Rubber - Trial Unit by Smooth - Image 1](https://m.media-amazon.com/images/I/81MxIlm4+KL.jpg)
![Mold Star 30 Silicone Mold Making Rubber - Trial Unit by Smooth - Image 2](https://m.media-amazon.com/images/I/71MKTOvqFRL.jpg)
![Mold Star 30 Silicone Mold Making Rubber - Trial Unit by Smooth - Image 3](https://m.media-amazon.com/images/I/719AiOp-2JL.jpg)
![Mold Star 30 Silicone Mold Making Rubber - Trial Unit by Smooth - Image 4](https://m.media-amazon.com/images/I/810O9OZWSoL.jpg)
![Mold Star 30 Silicone Mold Making Rubber - Trial Unit by Smooth - Image 5](https://m.media-amazon.com/images/I/71wzkM3noYL.jpg)

## Questions & Answers

**Q: whats the difference between oomo 30 and moldstar ?**
A: OOMOO 30 has a Shore hardness rating of 00-30, which is about as squishy as a gel shoe insert. Moldstar 30 is a hardness of Shore A-30, which is closer to pencil eraser hardness. It’s confusing, but there are 2 Shore hardness scales and a 30 on one is very different from a 30 on the other. In the description when it talks about hardness, pay attention to whether it says Shore A or Shore 00.

**Q: What color is this silicone? Can I use mica powders to color it**
A: It is blue when mixed, and very opaque, so I doubt powders will be able to color it much if at all. If you're looking to label your molds, I've 3D printed mirrored text using a raft, and set it into the mixed material. It floats, and pulls away cleanly once the material is cured.

If you want a platinum cure 2 part silicone around shore-A 30 you can color, I might suggest DragonSkin 30 or Platsil Gel-25.

**Q: Hi. i've made a wax mold of a small animal bone using this silicone method. i'm curious if i can use clay as well. i'm looking to make jewelry..**
A: On Smooth On's website it states that this line of mold will not work with modeling clays that contain sulfur. Their website was very helpful and has lots of information: http://www.smooth-on.com/Silicone-Rubber-an/c2_1115_1341/index.html

**Q: Is this food safe?**
A: No. Smooth On does however make a food safe silicone called Smooth -Sil 940

## Frequently Bought Together

- Smooth-On Mold Star 30-1A:1B Mix by Volume Platinum Silicone Rubber - Pint Unit
- Smooth-On Universal Mold Release - 14 Fluid Ounce Aerosol Can
- Smooth-Cast™ 300: Bright White, Low Viscosity, Liquid Plastic Casting Resin - Pint Unit

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.ie/products/725334922-mold-star-30-silicone-mold-making-rubber-trial-unit-by](https://www.desertcart.ie/products/725334922-mold-star-30-silicone-mold-making-rubber-trial-unit-by)

---

*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-26*