---
product_id: 256679582
title: "Mold Star 30 Silicone Mold Making Rubber - Trial Unit"
brand: "smooth-on"
price: "€ 93.24"
currency: EUR
in_stock: true
reviews_count: 5
category: "Smooth On"
url: https://www.desertcart.it/products/256679582-mold-star-30-silicone-mold-making-rubber-trial-unit
store_origin: IT
region: Italy
---

# 45 min pot life, 6 hr cure time Heat resistant up to 450°F Tear resistant & low shrinkage Mold Star 30 Silicone Mold Making Rubber - Trial Unit

**Brand:** smooth-on
**Price:** € 93.24
**Availability:** ✅ In Stock

## Summary

> ✨ Mold like a pro, cast like a boss! 🔥

## Quick Answers

- **What is this?** Mold Star 30 Silicone Mold Making Rubber - Trial Unit by smooth-on
- **How much does it cost?** € 93.24 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/256679582-mold-star-30-silicone-mold-making-rubber-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

## Key Features

- • **High Heat Tolerance:** Withstands up to 450°F, perfect for low-temp metal casting and more.
- • **Precision Mold Making:** Captures ultra-fine details for flawless casts every time.
- • **User-Friendly Formula:** 1:1 mix ratio with no vacuum degassing needed—simplicity meets performance.
- • **Durable & Long-Lasting:** Tear-resistant silicone ensures your molds stay strong through countless uses.
- • **Versatile Casting Compatibility:** Ideal for wax, gypsum, resins, concrete, and low-temp alloys.

## Overview

Smooth-On Mold Star 30 is a platinum silicone rubber that cures to a durable, tear-resistant mold with a Shore hardness of 30A. It offers a 1:1 mix ratio, 45-minute pot life, and cures in 6 hours without vacuum degassing. Heat resistant up to 450°F, it’s perfect for detailed casting of wax, gypsum, resins, concrete, and low-temperature metal alloys.

## Description

Smooth-On Mold Star 30 from Smooth-On is an easy to use platinum silicone mold mix that cures to a soft, strong, tear resistant rubber. Mold Star 30 molds will last a long time and good for casting wax, gypsum, resins, concrete and more. Cured Mold Star rubber is heat resistant up to 450 degrees F. Mold Star 30 is harder material than Mold Star 15 & 16 with a 30A Shore hardness. Mixed ratio of1A:1B with a pot life of 45 minutes and cure time of 6 hours. Mold Star does not require vavuum degassing & is not intended for brush on mold making. 1 lb each part A & part B.

Review: No me sirve - El color de la silicona es azul el bote B y el A beige no me sirve para nada de lo tenía pensado hacer pensé que era transparente y me he equivocado así que dinero a la basura
Review: Easy to use, strong, excellent detail capture - Easy to use, great working time and strong upon curing. It's also well worth mentioning that the level of detail you can capture with this product is mind blowing. Work as advertised, and intended which is ideally what you want for any product at the end of the day.

## Features

- 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, 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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00ETAY8RI |
| Brand | Smooth-On |
| Brand Name | Smooth-On |
| Color | Blue |
| Colour | Blue |
| Customer Reviews | 4.6 out of 5 stars 688 Reviews |
| Item Dimensions | 19.1 x 15.2 x 7.6 centimeters |
| Item Weight | 0.59 Kilograms |
| Item dimensions L x W x H | 19.1 x 15.2 x 7.6 centimeters |
| Item height | 2.99 inches |
| Manufacturer | Smooth-On |
| Material | Silicone |
| Material Type | Silicone |
| Number of pieces | 1 |
| Shape | Star |
| UPC | 751635227415 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Smooth-On
- **Colour:** Blue
- **Item dimensions L x W x H:** 19.1 x 15.2 x 7.6 centimeters
- **Material:** Silicone
- **Shape:** Star

## Images

![Mold Star 30 Silicone Mold Making Rubber - Trial Unit - Image 1](https://m.media-amazon.com/images/I/81MxIlm4+KL.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

## Customer Reviews

### ⭐ No me sirve
*by A***A on 4 December 2025*

El color de la silicona es azul el bote B y el A beige no me sirve para nada de lo tenía pensado hacer pensé que era transparente y me he equivocado así que dinero a la basura

### ⭐⭐⭐⭐⭐ Easy to use, strong, excellent detail capture
*by M***L on 27 April 2021*

Easy to use, great working time and strong upon curing. It's also well worth mentioning that the level of detail you can capture with this product is mind blowing. Work as advertised, and intended which is ideally what you want for any product at the end of the day.

### ⭐⭐⭐⭐⭐ Simple to use and efficient
*by M***A on 30 November 2021*

The product is easy to mix (use a scale), the mix of colors tells you when ready to use, it is tick enough to hold itself but will fit the tiniest crack, will cure in 4-6 hours (I added an infrared heater to help), will detach easily and remain flexible, solid and firm after curing. I use it to duplicate concrete wall stones and it works very well. NB: Make sure your structure has no leak otherwise the liquid rubber will seek through.

## 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

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-02-28*