---
product_id: 22727564
title: "THI-VEX - Thixotropic Agent for Thickening Smooth-On Silicone Rubbers - Pint Bottle"
brand: "smooth-on"
price: "¥12377"
currency: JPY
in_stock: true
reviews_count: 12
category: "Smooth On"
url: https://www.desertcart.jp/products/22727564-thi-vex-thixotropic-agent-for-thickening-smooth-on-silicone-rubbers
store_origin: JP
region: Japan
---

# Ideal for vertical brush-on molds Precision thickening control Minimal quantity, maximum effect THI-VEX - Thixotropic Agent for Thickening Smooth-On Silicone Rubbers - Pint Bottle

**Brand:** smooth-on
**Price:** ¥12377
**Availability:** ✅ In Stock

## Summary

> 🖌️ Elevate your mold game—thicken smarter, not harder!

## Quick Answers

- **What is this?** THI-VEX - Thixotropic Agent for Thickening Smooth-On Silicone Rubbers - Pint Bottle by smooth-on
- **How much does it cost?** ¥12377 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/22727564-thi-vex-thixotropic-agent-for-thickening-smooth-on-silicone-rubbers)

## 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

- • **Trusted by Creators:** Top-rated by 400+ pros who demand precision and reliability
- • **Seamless Compatibility:** Specifically engineered for Smooth-On silicones (excludes Mold Max 40/60)
- • **Enhanced Mold Stability:** Prevents dripping and sagging for professional-grade brush-on coats
- • **Ultra-Efficient Formula:** Just a few drops transform your silicone application—no waste, no mess
- • **Customizable Viscosity Mastery:** Adjust thickness effortlessly for flawless vertical molds

## Overview

THI-VEX is a specialized thixotropic agent designed to thicken Smooth-On silicone rubbers, enabling perfect vertical brush-on mold applications. By adding just a small percentage to Part A and mixing thoroughly with Parts A and B, users can customize viscosity to prevent drips and material waste. Highly rated and favored by professional mold makers, THI-VEX delivers precision thickening without compromising cure times, though it is incompatible with Mold Max 40 and 60 silicones.

## Description

THI-VEX is made especially for thickening Smooth-On silicones for vertical surface application (making brush-on molds). Different viscosities can be attained by varying the amount of THI-VEX. THI-VEX is added as a percentage of Part A and must be thoroughly mixed with Parts A and B. THI-VEX will not work with Mold Max 40 or Mold Max 60 silicones.

Review: Excellent for thickening Rebound 40 - Phenomenal stuff! Used to make a mold with Smooth on rebound 40. My first two coats without thi-vex leaked all over the table, last coat put just 3-4 drops in and stirred for a couple minutes and thickened it perfectly, last coat stayed put and didn’t waste material…excellently stuff!!!
Review: Careful. Very strong. - Use sparingly, a little goes a long way. If you see with dragon skin, start with one or two drops as it shortens cure time. Haven't used it 3nough to talk about durability but the company is know for its amazing products, so I wont doubt this one.

## Features

- Thickening Liquid For Silicone Rubber
- Thickens Smooth-On Silicones
- Use For Making Brush-On Molds
- Only a Small Amount Is Needed

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01ACAHUR8 |
| Best Sellers Rank | #23,157 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #304 in Sculpture Supplies |
| Brand | Smooth-On |
| Customer Reviews | 4.6 4.6 out of 5 stars (405) |
| Date First Available | January 7, 2016 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.96 ounces |
| Manufacturer | Smooth-On, Inc. |
| Manufacturer Part Number | 83920B |
| Package Dimensions | 6.38 x 2.91 x 2.83 inches |
| Size | Pint Bottle |

## Images

![THI-VEX - Thixotropic Agent for Thickening Smooth-On Silicone Rubbers - Pint Bottle - Image 1](https://m.media-amazon.com/images/I/41RcM9pPINL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent for thickening Rebound 40
*by A***R on November 17, 2025*

Phenomenal stuff! Used to make a mold with Smooth on rebound 40. My first two coats without thi-vex leaked all over the table, last coat put just 3-4 drops in and stirred for a couple minutes and thickened it perfectly, last coat stayed put and didn’t waste material…excellently stuff!!!

### ⭐⭐⭐⭐⭐ Careful. Very strong.
*by I***S on September 18, 2025*

Use sparingly, a little goes a long way. If you see with dragon skin, start with one or two drops as it shortens cure time. Haven't used it 3nough to talk about durability but the company is know for its amazing products, so I wont doubt this one.

### ⭐⭐⭐⭐⭐ Where has this been all my life?!?
*by P***E on December 14, 2024*

Thinking of how much silicone I’ve wasted from dripping off molds, this definitely does the job! Add a few small squirts (depending on amount of silicone) and stir for 2 minutes till you decide to add more. It’s amazing for mold making! I’ve made my silicone as thick as Vaseline and it goes on so smooth and thick, not wasting silicone and hours of having to pour more silicone to build up the mold.

## Frequently Bought Together

- THI-VEX - Thixotropic Agent for Thickening Smooth-On Silicone Rubbers - Pint Bottle
- Smooth-On Rebound™ 25 Brushable Platinum Cure Silicone Rubber for Mold Making - Pint Unit
- Ease Release 200 Mold Release - 14 Fluid Ounce Aerosol Can

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**Shop now:** [https://www.desertcart.jp/products/22727564-thi-vex-thixotropic-agent-for-thickening-smooth-on-silicone-rubbers](https://www.desertcart.jp/products/22727564-thi-vex-thixotropic-agent-for-thickening-smooth-on-silicone-rubbers)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-11*