A-300-8: Thixotropic Agent

Got it — that’s a key selling point. Here’s a revised version with that emphasized:

A-300-8 Thixotropic Agent (“Thixo”)

A-300-8 Thixotropic Agent is a liquid additive used to increase the viscosity of platinum (addition-cure) silicone elastomers, transforming them from a flowable liquid into a non-slumping, brushable paste for improved application control.

Most importantly, A-300-8 helps reduce and release trapped air bubbles during mixing and application, resulting in smoother, more defect-free castings and molds.

This additive modifies the rheology of silicone without affecting the cured material’s mechanical or physical properties, maintaining the integrity of the elastomer.

A-300-8 performs similarly to A-300-1, offering the same functionality in a more economical option.

Product Features

• Helps eliminate and release air bubbles for smoother results

• Converts silicone to a non-sag, brushable consistency

• Enables brush-on applications

• Maintains original rubber properties

• Translucent liquid additive

• Compatible with platinum-cure silicone systems

• More cost-effective alternative to A-300-1

Usage

• Add 1–2 drops per 10 grams of silicone elastomer

• Adjust as needed to achieve desired viscosity and bubble release

Applications

• Brush-on mold making

• Detailed or vertical surface applications

• Any application requiring reduced air entrapment and improved surface finish

A simple, essential additive for achieving bubble-free, high-quality silicone results.