---
product_id: 256679582
title: "Mold Star 30 Silicone Mold Making Rubber - Trial Unit"
brand: "smooth-on"
price: "494 zł"
currency: PLN
in_stock: true
reviews_count: 5
category: "Smooth On"
url: https://www.desertcart.pl/products/256679582-mold-star-30-silicone-mold-making-rubber-trial-unit
store_origin: PL
region: Poland
---

# 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:** 494 zł
**Availability:** ✅ In 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-on
- **How much does it cost?** 494 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/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

- • **Durability That Lasts:** Tear-resistant silicone ensures your molds stay strong through countless uses.
- • **Precision Mold Mastery:** Captures ultra-fine detail for flawless casts every time.
- • **Effortless Mixing & Use:** 1:1 mix ratio with no vacuum degassing needed—simplicity meets efficiency.
- • **Heat-Defying Performance:** Withstands up to 450°F, perfect for low-temp metal casting and more.
- • **Versatile Casting Compatibility:** Ideal for wax, gypsum, resins, concrete, and low-temp metal alloys.

## Overview

Smooth-On Mold Star 30 is a platinum silicone mold-making rubber that cures to a durable, tear-resistant, and heat-resistant (up to 450°F) soft rubber. With a balanced 1:1 mix ratio, 45-minute pot life, and 6-hour cure time, it delivers high-detail molds ideal for casting wax, gypsum, resins, concrete, and low-temperature metal alloys—no vacuum degassing required.

## 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: 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

- 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 |
| Color | Blue |
| Customer Reviews | 4.6 4.6 out of 5 stars (692) |
| Date First Available | 24 January 2015 |
| Item Weight | 590 g |
| Material | Silicone |
| Model Number | moldstar30 |
| Product Dimensions | 19.1 x 15.19 x 7.59 cm; 590 g |
| Special Features | Heat Resistant |

## 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)

## Available Options

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

## 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 12 February 2026*

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

### ⭐⭐⭐⭐⭐ Review
*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.

### ⭐⭐⭐⭐⭐ Review
*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 Poland*
*Store origin: PL*
*Last updated: 2026-04-26*