---
product_id: 2943521
title: "Alumilite High Strength 3 Tin-Based Silicone Rubber Molding [1 lb 2 Part Kit] 10:1 Ratio Liquid Mix with Catalyst | DIY Making & Casting Resin of One-Piece Flexible Molds with Deep Undercuts"
brand: "crafter's companion"
price: "S$30"
currency: SGD
in_stock: false
reviews_count: 13
url: https://www.desertcart.sg/products/2943521-alumilite-high-strength-3-tin-based-silicone-rubber-molding-1
store_origin: SG
region: Singapore
---

# 45 min pot life, 18 hr demold 8-10A shore hardness, ultra-flexible 115 ppi tear strength Alumilite High Strength 3 Tin-Based Silicone Rubber Molding [1 lb 2 Part Kit] 10:1 Ratio Liquid Mix with Catalyst | DIY Making & Casting Resin of One-Piece Flexible Molds with Deep Undercuts

**Brand:** crafter's companion
**Price:** S$30
**Availability:** ❌ Out of Stock

## Summary

> 🎭 Mold your masterpiece with precision and speed—because your creativity deserves the best!

## Quick Answers

- **What is this?** Alumilite High Strength 3 Tin-Based Silicone Rubber Molding [1 lb 2 Part Kit] 10:1 Ratio Liquid Mix with Catalyst | DIY Making & Casting Resin of One-Piece Flexible Molds with Deep Undercuts by crafter's companion
- **How much does it cost?** S$30 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/2943521-alumilite-high-strength-3-tin-based-silicone-rubber-molding-1)

## Best For

- crafter's companion enthusiasts

## Why This Product

- Trusted crafter's companion brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Simple 10:1 Mix Ratio:** No guesswork—just weigh, mix until pink, and pour for professional-grade results.
- • **Fast Turnaround for Creators:** Demolds in just 18 hours with a 45-minute pot life—keep your projects moving.
- • **Flexible One-Piece Mold Magic:** Tin-based silicone rubber flexes around originals for seamless, cost-saving DIY molds.
- • **Master Complex Molds with Ease:** Perfect for deep undercuts & intricate designs—capture every detail flawlessly.
- • **Bubble-Free Pouring, Minimal Fuss:** Pourable mix releases air naturally; degassing optional but recommended for perfection.

## Overview

Alumilite High Strength 3 is a premium tin-based silicone rubber kit designed for crafting flexible, one-piece molds with complex undercuts. Featuring 8-10A shore hardness and 115 ppi tear strength, it offers durability and fine detail capture. With a 45-minute pot life and 18-hour demold time, it accelerates your creative workflow. The pourable formula minimizes bubbles without mandatory degassing, making it ideal for professional DIY mold makers seeking precision and efficiency.

## Description

The High Strength 3 is a great choice in making molds with deep undercuts, negative space or hard-to-reach areas. The rubber material has an 8-10A shore hardness and a tear strength of 115 ppi. This tin-based silicone rubber kit makes it easy to create one-piece molds that require a super soft and flexible silicone rubber to flex around complex originals. It has a pot life of 45 minutes and demolds in 18 hours. DIY molds fully cure in 7 days and are ready to make casting after casting! The pourable silicone rubber mixes easily and the consistency allows for great air release with minimal bubbles. Degassing is not mandatory, but is recommended. Easily mix and pour! Made in the USA.

Review: Amazing indeed! One of the very best mold materials for the home crafter! - Really excellent product for capturing fine details! Please be advised that this is not appropriate for hard clays like sculpey etc. as the super flexibility may cause distortion if you are attempting to pack a hard material into it. That said it works wonderfully with liquid clays as you can bake right in the mold. If using a soft air dry clay please remember that you need to add extra days drying time as the only evaporative surfaces are the ones that are still exposed to the air directly. Improper measuring of the materials will give you a sticky result so it really does help to invest in a little digital scale that does fractional grams. Wear gloves and only mix in containers you consider disposable and please allow good ventilation when mixing as it has quite an odor until fully cured. To avoid air bubbles in your finished mold it really helps to have a little vibration from the bottom before you pour as well as after the piece has been poured piercing the bubbles that come to the surface with a pin. Be advised since this is not a platinum cured silicone is is not meants for contact with skin. Happy sculpting!
Review: I found this easy to use and just got my first mold made - I found this easy to use and just got my first mold made. I make candles and have found some molds difficult to find. Or of a quality that I would sell the end product. So I decided to try making my own. Instructions were easy, I didn't have to learn a whole new hobby to get started and have a finished product. Have made my first mold, an apple I bought from the store and then polyurethaned before trying to make the mold. Came out great, the candle looks exactly like the apple I made it from. Even to the point of the small bruised spot on the apple. Gives the candle a uniqueness. I found some pitting in the candle when made, apparently from air bubbles in the mold. But I think the bubbles in the mold are due more to my inexperience when making the mold, than a product error. You can do one small object with the pound of rubber. I plan on ordering more after writing this review. Very excited!

## Features

- PERFECT FOR COMPLEX MOLDS: Do you need a mold for a complicated project? The High Strength 3 is a great choice in making molds with deep undercuts, negative space, or hard-to-reach areas. This rubber material has an 8-10A shore hardness and a tear strength of 115 ppi.
- GREAT FOR 1-PIECE MOLDS: Couldn't find the perfect molds elsewhere? Our tin-based silicone rubber kit makes it easy to create one-piece molds that require a super soft & flexible silicone rubber to flex around complex originals. You can also save money compared to buying them from a store if you can find them!
- FAST DEMOLDING TIME: This two-part mix has a pot life of 45 minutes and demolds in 18 hours. Your DIY molds fully cure in 7 days and will be ready to make casting after casting!
- NO DEGASSING REQUIRED: Our pourable silicone rubber mixes easily and the consistency allows for great air release with minimal bubbles. As a result, degassing is not mandatory, but it is recommended when possible.
- EASY TO MIX: Unsure how to measure & mix these 2 part silicone compounds? Weigh the base amount you need and add 1/10th (or 10%) of the base weight in the catalyst. Mix thoroughly until the color is pink without any swirls or inconsistencies. Then start pouring it into your mold box!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004BNA6VA |
| Best Sellers Rank | #591,802 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #3,185 in Sculpture Molding & Casting Products |
| Brand | Crafter's Companion |
| Color | Pink |
| Customer Reviews | 4.1 4.1 out of 5 stars (761) |
| Date First Available | November 10, 2010 |
| Global Trade Identification Number | 00689076922692 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.23 pounds |
| Item dimensions L x W x H | 3.75 x 4.75 x 4 inches |
| Item model number | A20501 |
| Manufacturer | Notions - In Network |
| Material | silicone rubber |
| Number of Pieces | 1000 |
| Product Dimensions | 3.75 x 4.75 x 4 inches |
| Shape | Round |
| UPC | 717917211596 811138021603 689076922692 |

## Product Details

- **Brand:** Crafter's Companion
- **Color:** Pink
- **Item dimensions L x W x H:** 3.75 x 4.75 x 4 inches
- **Material:** silicone rubber
- **Shape:** Round

## Images

![Alumilite High Strength 3 Tin-Based Silicone Rubber Molding [1 lb 2 Part Kit] 10:1 Ratio Liquid Mix with Catalyst | DIY Making & Casting Resin of One-Piece Flexible Molds with Deep Undercuts - Image 1](https://m.media-amazon.com/images/I/719YR6-xubL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Amazing indeed! One of the very best mold materials for the home crafter!
*by L***A on December 24, 2015*

Really excellent product for capturing fine details! Please be advised that this is not appropriate for hard clays like sculpey etc. as the super flexibility may cause distortion if you are attempting to pack a hard material into it. That said it works wonderfully with liquid clays as you can bake right in the mold. If using a soft air dry clay please remember that you need to add extra days drying time as the only evaporative surfaces are the ones that are still exposed to the air directly. Improper measuring of the materials will give you a sticky result so it really does help to invest in a little digital scale that does fractional grams. Wear gloves and only mix in containers you consider disposable and please allow good ventilation when mixing as it has quite an odor until fully cured. To avoid air bubbles in your finished mold it really helps to have a little vibration from the bottom before you pour as well as after the piece has been poured piercing the bubbles that come to the surface with a pin. Be advised since this is not a platinum cured silicone is is not meants for contact with skin. Happy sculpting!

### ⭐⭐⭐⭐⭐ I found this easy to use and just got my first mold made
*by S***R on October 4, 2014*

I found this easy to use and just got my first mold made. I make candles and have found some molds difficult to find. Or of a quality that I would sell the end product. So I decided to try making my own. Instructions were easy, I didn't have to learn a whole new hobby to get started and have a finished product. Have made my first mold, an apple I bought from the store and then polyurethaned before trying to make the mold. Came out great, the candle looks exactly like the apple I made it from. Even to the point of the small bruised spot on the apple. Gives the candle a uniqueness. I found some pitting in the candle when made, apparently from air bubbles in the mold. But I think the bubbles in the mold are due more to my inexperience when making the mold, than a product error. You can do one small object with the pound of rubber. I plan on ordering more after writing this review. Very excited!

### ⭐⭐⭐⭐⭐ RTV Works as advertised
*by M***D on October 25, 2016*

RTV Rubber works as expected. Picks up fine detail. Very durable. Definitely sticks to itself - I needed to cut a a part of the bottom of a mold off and glue it to the top to make it easier to use - parting line didn't work as anticipated. Cut off what I wanted and used this to attach to top. Watch out though since this can work against you if you are making a 2 part mold. be sure to use rubber release component. otherwise it will stick together, burying your master in the rubber. I had to start over for one 2 part mold. FYI, PB blaster does NOT work! - guess how I know :) Micomarks sell something but I think it has a shelf life as I put on 3 coats as recommended and still had problems - thats why I tried PB Blaster. next time will use vasoline or maybe even some acrylic paint. it should work. none of the issues are with the RTV, more with the mold maker!

## Frequently Bought Together

- Alumilite High Strength 3 Tin-Based Silicone Rubber Molding [1 lb 2 Part Kit] 10:1 Ratio Liquid Mix with Catalyst | DIY Making & Casting Resin of One-Piece Flexible Molds with Deep Undercuts
- Alumilite Amazing White Casting Resin Kit, 32 oz (16 oz Part A + 16 oz Part B) – Ideal for Pouring Small to Large Durable Pieces, Arts, Crafts, Jewelry, and Decorative Items, 10-Minute Cure Time

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-01-27*