---
product_id: 725334922
title: "Mold Star 30 Silicone Mold Making Rubber - Trial Unit by Smooth"
brand: "smooth-on"
price: "663 zł"
currency: PLN
in_stock: false
reviews_count: 5
category: "Smooth On"
url: https://www.desertcart.pl/products/725334922-mold-star-30-silicone-mold-making-rubber-trial-unit-by
store_origin: PL
region: Poland
---

# 45 min pot life Heat resistant 450°F 1:1 volume mix ratio Mold Star 30 Silicone Mold Making Rubber - Trial Unit by Smooth

**Brand:** smooth-on
**Price:** 663 zł
**Availability:** ❌ Out of Stock

## Summary

> 🔥 Mold like a pro, cast like a visionary!

## Quick Answers

- **What is this?** Mold Star 30 Silicone Mold Making Rubber - Trial Unit by Smooth by smooth-on
- **How much does it cost?** 663 zł with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/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

- • **Optimal Work Window:** Generous 45-minute pot life lets you craft without rush or waste.
- • **Long-Lasting Durability:** Tear-resistant, low shrinkage silicone that keeps your molds library fresh and reliable.
- • **Effortless Precision Mixing:** No scale needed with perfect 1:1 volume ratio for flawless molds every time.
- • **Versatile Casting Compatibility:** Ideal for wax, plaster, resin, concrete, and even low-temp metal alloys up to 450°F.
- • **Professional-Grade Detail Capture:** Low viscosity formula captures intricate details with ease—your projects deserve the best.

## Overview

Mold Star 30 is a platinum-cured silicone rubber with shore 30A hardness, offering a 45-minute pot life and 6-hour cure time. Its 1:1 volume mix ratio eliminates measuring guesswork, while its heat resistance up to 450°F makes it perfect for diverse casting materials including wax, plaster, resin, concrete, and low-temp metal alloys. Tear-resistant and low shrinkage, it delivers professional-grade molds with exceptional detail fidelity.

## 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.

Review: Produkt ist super. Warum wird nicht mehr angeboten. Benötige dringend 2x
Review: 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

- 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 |
|---------------|-------|
| ASIN | B00ETAY8RI |
| Amazon Bestseller | #1,188,676 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #2,326 in Candy Making Supplies #4,852 in Hobby Building Tools & Hardware |
| Batteries Included | No |
| Batteries Required | No |
| Brand Name | Smooth-On |
| Color | bule |
| Customer Reviews | 4.6 4.6 out of 5 stars (692) |
| Date First Available | January 24, 2015 |
| Item Weight | 0.59 Kilograms |
| Manufacturer | Smooth-On, Inc. |
| Material | Silicone |
| Model Number | COMINHKR067156 |
| Package Dimensions | 19.1 x 15.2 x 7.7 cm |
| Package Weight | 1.09 Kilograms |

## Product Details

- **Brand:** Smooth-On
- **Color:** bule
- **Item dimensions L x W x H:** 19.1 x 15.2 x 7.6 cm
- **Material:** Silicone
- **Shape:** Star

## 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

## Customer Reviews

### ⭐ Review
*by F***L on February 12, 2026*

Produkt ist super. Warum wird nicht mehr angeboten. Benötige dringend 2x

### ⭐⭐⭐⭐⭐ Review
*by M***L on April 27, 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.

### ⭐⭐⭐⭐⭐ Review
*by M***A on November 30, 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 Poland*
*Store origin: PL*
*Last updated: 2026-05-11*