---
product_id: 438677496
title: "Smooth-On Thi-Vex Silicone Thickening Agent - 1 oz. Bottle"
brand: "smooth-on"
price: "S$29"
currency: SGD
in_stock: true
reviews_count: 5
category: "Smooth On"
url: https://www.desertcart.sg/products/438677496-smooth-on-thi-vex-silicone-thickening-agent-1-oz-bottle
store_origin: SG
region: Singapore
---

# Perfect for brush-on molds Adjustable viscosity control Only small amounts needed Smooth-On Thi-Vex Silicone Thickening Agent - 1 oz. Bottle

**Brand:** smooth-on
**Price:** S$29
**Availability:** ✅ In Stock

## Summary

> 🧴 Elevate your silicone game—thicken smarter, not harder!

## Quick Answers

- **What is this?** Smooth-On Thi-Vex Silicone Thickening Agent - 1 oz. Bottle by smooth-on
- **How much does it cost?** S$29 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/438677496-smooth-on-thi-vex-silicone-thickening-agent-1-oz-bottle)

## 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

- • **Versatile Viscosity Range:** From medium to high thickness, customize your project’s flow with ease.
- • **Precision Viscosity Control:** Tailor your silicone thickness for flawless vertical applications.
- • **Minimal Usage, Maximum Impact:** A little THI-VEX goes a long way—optimize your materials and budget.
- • **Seamless Silicone Integration:** Formulated exclusively for Smooth-On silicones for consistent results.
- • **Effortless Brush-On Mold Creation:** Achieve smooth, drip-free layers every time.

## Overview

Smooth-On Thi-Vex is a premium silicone thickening agent designed to precisely adjust the viscosity of Smooth-On silicones for brush-on mold applications. This USA-made, clear liquid requires only a small amount to transform your silicone into a perfect vertical coating, enabling professional-grade mold making with customizable thickness levels.

## 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: Thi vex - It’s great for my silicone paint
Review: Working good with my RTV silicon - Working good with my RTV silicon

## 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 | B01ACABSC6 |
| Best Sellers Rank | #1,113,544 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #1,186 in Sculpture Molding & Casting Products |
| Brand | Smooth-On |
| Colour | Clear |
| Country of Origin | USA |
| Item Form | Liquid |
| Item Package Quantity | 1 |
| Item Volume | 1 Fluid Ounces |
| Item Weight | 27.2 g |
| Item model number | 43216-54379 |
| Manufacturer | Smooth-On, Inc. |
| Material | Silicone |
| Number of Pieces | 1 |
| Package Information | Bottle, Can |
| Special Feature | Thixotropic, Adjustable Viscosity |
| Specific Uses For Product | Casting |
| UPC | 751635839205 |
| Viscosity | Adjustable, typically higher than original Smooth-On silicone |
| Viscosity Level | Medium to High |
| Water Resistance Level | Not Water Resistant |

## Product Details

- **Brand:** Smooth-On
- **Item Form:** Liquid
- **Material:** Silicone
- **Special Feature:** Thixotropic, Adjustable Viscosity
- **Specific Uses For Product:** Casting

## Images

![Smooth-On Thi-Vex Silicone Thickening Agent - 1 oz. Bottle - Image 1](https://m.media-amazon.com/images/I/41otcWX7hrL.jpg)

## Available Options

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

## Questions & Answers

**Q: Is this a good thickener for use with alumilite quick set rtv silicone?**
A: The Thi-Vex is normally used to thicken brush-ons like the rebound 25 silicone which checks its tendency to flow especially when the object being molded is in the vertical. The alumilite quickset silicone is not a brush on silicone. It is meant for pouring and therefore does not need the thi-vex thickener. If you make it thicker, it will be difficult for it to copy very intricate features.I hope this helps.

**Q: Will this work with Mold Maker by Alumilite?**
A: We don't test Thi-Vex with non-Smooth-On silicones.

**Q: Part A of my smooth-on got hard, can i use this with only part B to make a mold?**
A: No, that won't work

**Q: Can I use this with OoMoo30?**
A: It will work for OoMoo30, but I had much better results using rebound 25 with the thivex

## Customer Reviews

### ⭐⭐⭐⭐⭐ Thi vex
*by H***R on 3 November 2024*

It’s great for my silicone paint

### ⭐⭐⭐⭐ Working good with my RTV silicon
*by M***Y on 28 January 2025*

Working good with my RTV silicon

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

## Frequently Bought Together

- THI-VEX - Thixotropic Agent for Thickening Smooth-On Silicone Rubbers - 1 Ounce Bottle
- Rebound 25 - Brushable Platinum Silicone Rubber - Gallon Unit
- Ease Release 200 Mold Release - 14 Fluid Ounce Aerosol Can

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**Shop now:** [https://www.desertcart.sg/products/438677496-smooth-on-thi-vex-silicone-thickening-agent-1-oz-bottle](https://www.desertcart.sg/products/438677496-smooth-on-thi-vex-silicone-thickening-agent-1-oz-bottle)

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-02-08*