WEST SYSTEM 406 Colloidal Silica Epoxy Filler Thickening Additive for WEST SYSTEM Epoxy | Viscosity Control for Strong Structural Bonds | Made in the USA

West System 406-2 Colloidal Silica 1.7 oz

• Epoxy thickening additive for viscosity control – WEST SYSTEM 406 Colloidal Silica is a finely powdered Made in the USA additive used to thicken epoxy and control viscosity for improved handling in specific applications.
• Prevents epoxy runoff – Adding this colloidal silica to epoxy resin and hardener mixtures helps prevent runoff on vertical and overhead surfaces, improving material placement without sagging.
• Enhances fairing compound performance – This additive can be used to improve epoxy fairing compounds by increasing strength, consistency, and abrasion resistance where a thicker body is needed.
• Cures to a creamy off-white color – Mixed into epoxy, 406 colloidal silica produces a stable, creamy off-white paste suitable for fairing and other structural tasks.
• Compatible with WEST SYSTEM epoxy systems – Designed for use with WEST SYSTEM epoxy resins and hardeners, this additive helps customize handling without altering the fundamental cure or strength of the base epoxy.