Colloidal Silica Epoxy Filler Thickening Additive For Viscosity Control And Runoff Prevention, Easy Mix For No Mess, Improves Handling And Structural Bond Strength, Built For Tough Epoxy Projects, Made In The USA

Colloidal Silica Epoxy Thickener (1.7 oz) for Viscosity
✔️ Improves handling and prevents runoff; works with WEST SYSTEM

West System 406-2 Colloidal Silica is a fine silica powder used to thicken epoxy, giving you better control over viscosity for precise placement. Ideal for marine repairs, fiberglass work, and structural fairing tasks.

✅ Thickens epoxy to control viscosity for better handling on vertical or overhead work
✅ Prevents epoxy runoff and sag during application on vertical surfaces
✅ Improves strength and abrasion resistance in fairing compounds
✅ Cures to a creamy off-white paste for smooth fairing consistency
✅ Compatible with WEST SYSTEM resins and hardeners; preserves cure and bond strength

💡 What is an epoxy thickening additive used for?

This handy additive helps you tailor epoxy flow, improve control, and reduce runoff in challenging builds. - Improves placement on vertical surfaces and minimizes sag - Enhances fairing compound consistency for smooth finishes - Maintains base epoxy strength while adjusting viscosity