---
product_id: 68078902
title: "Polycraft RTV Silicone Thixotropic Thickening Agent (Thixo), Mould Making, Casting, Resin Art, Professional Grade Thickener for Silicone, Easy Mixing and Application, Non-Toxic Formula - 25g"
brand: "polycraft ( mb fibreglass )"
price: "$47.22"
currency: USD
in_stock: true
reviews_count: 2
category: "Polycraft ( Mb Fibreglass )"
url: https://www.desertcart.us/products/68078902-polycraft-rtv-silicone-thixotropic-thickening-agent-thixo-mould-making-casting
store_origin: US
region: United States of America
---

# Brush-up technique friendly Up to 25g thickening per 1kg silicone Temperature-responsive viscosity Polycraft RTV Silicone Thixotropic Thickening Agent (Thixo), Mould Making, Casting, Resin Art, Professional Grade Thickener for Silicone, Easy Mixing and Application, Non-Toxic Formula - 25g

**Brand:** polycraft ( mb fibreglass )
**Price:** $47.22
**Availability:** ✅ In Stock

## Summary

> 🎨 Elevate your mould-making game—thicken, control, and create like a pro!

## Quick Answers

- **What is this?** Polycraft RTV Silicone Thixotropic Thickening Agent (Thixo), Mould Making, Casting, Resin Art, Professional Grade Thickener for Silicone, Easy Mixing and Application, Non-Toxic Formula - 25g by polycraft ( mb fibreglass )
- **How much does it cost?** $47.22 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/68078902-polycraft-rtv-silicone-thixotropic-thickening-agent-thixo-mould-making-casting)

## Best For

- polycraft ( mb fibreglass ) enthusiasts

## Why This Product

- Trusted polycraft ( mb fibreglass ) brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Bubble-Free Mould Mastery:** Use with an initial un-thickened silicone coat to achieve professional-grade, smooth moulds.
- • **Temperature Smart Formula:** Easily restore consistency with a simple hot water bath—no more clumps or hardening.
- • **Precision Thickening Power:** Boost silicone viscosity for ultra-detailed moulds with up to 25g per kilo.
- • **Safe & Non-Toxic Creativity:** Craft with confidence using a professional-grade, non-toxic thickener designed for resin art.
- • **Flawless Brush-Up Application:** Perfect for artists who demand control—prevents run-off and ensures even coverage.

## Overview

Polycraft RTV Silicone Thixotropic Thickening Agent is a professional-grade additive that enhances silicone viscosity up to 25g per kilo, ideal for detailed mould making and resin art. It supports brush-up techniques by preventing silicone run-off, ensures bubble-free moulds when paired with an initial un-thickened coat, and features a temperature-responsive formula that can be restored with a hot water bath. Non-toxic and easy to mix, it’s designed for precision and smooth application in creative projects.

## Description

Product description This agent may be added up to 25g per 1 kilo of Silicone.For those of you that prefer to us a brush-up technique when making moulds, this is a very useful additive. Most silicone compounds are designed to be poured and will run off off your model, seeking the lowest point.Thixo tropic Agent is an additive for RTV Silicone to thicken the silicone. The liquid silicone is thickened to make it more suitable to creating certain types of moulds. With correct amounts of this agent the silicone may be smoothed on to the original.For best results we would always recommend applying a first coat of un-thickened Silicone to create a bubble free mould.Silicone Thixo may harden and become firm in low temperatures, stand container in a hot water bath to restore to liquid form.Silicone Thixo is not suitable to be used with high temperature and food safe silicone mould making rubbers. Legal Disclaimer Unfortunately we are unable to ship this item to, Isle of Man, Channel Islands or any Scottish Islands. Orders placed for these addresses will be cancelled and refunded due to carrier restrictions.

Review: Excellent prduct - Excellent product & excellent service thank you 🙏
Review: Works as intended: Recommended - Work as advertised, and intended which is ideally what you want for any product at the end of the day.

## Features

- Enhances Viscosity - Add up to 25g per 1 kilo of Silicone, thickening the liquid silicone to create moulds with greater detail and precision.
- Brush-Up Technique Friendly - Ideal for users preferring a brush-up technique for mold making, preventing silicone from running off the model and seeking the lowest point.
- Smooth Application - Thixotropic Agent thickens silicone for smoother application onto the original, ensuring a bubble-free mould with correct usage.
- Optimal Mould Quality - For best results, apply a first coat of un-thickened Silicone to create a bubble-free mould, achieving professional-grade results.
- Temperature Considerations - Thixo may firm up in low temperatures, simply place the container in a hot water bath to restore it to a liquid form. Not suitable for use with high-temperature or food-safe silicone mould-making rubbers.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B006YQF9MS |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 415,409 in Home & Kitchen ( See Top 100 in Home & Kitchen ) 1,288 in Sculpting Moulding & Casting |
| Colour | Clear |
| Customer Reviews | 5.0 5.0 out of 5 stars (10) |
| Date First Available | 7 April 2009 |
| Item Package Quantity | 1 |
| Item model number | QL2476 |
| Manufacturer | Polycraft ( MB Fibreglass ) |
| Material | Silicone |
| Special Features | Non Toxic |
| Specific uses | Mould Making, Casting, Resin Art |

## Product Details

- **Brand:** Polycraft ( MB Fibreglass )
- **Item form:** Liquid
- **Material:** Silicone
- **Special feature:** Non Toxic
- **Specific uses for product:** Mould Making, Casting, Resin Art

## Images

![Polycraft RTV Silicone Thixotropic Thickening Agent (Thixo), Mould Making, Casting, Resin Art, Professional Grade Thickener for Silicone, Easy Mixing and Application, Non-Toxic Formula - 25g - Image 1](https://m.media-amazon.com/images/I/51MIzMFqZWS.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent prduct
*by J***E on 20 February 2023*

Excellent product & excellent service thank you 🙏

### ⭐⭐⭐⭐⭐ Works as intended: Recommended
*by M***L on 27 April 2021*

Work as advertised, and intended which is ideally what you want for any product at the end of the day.

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-27*