Sika BPO Cream Hardener Red 1oz Tube Resin Required

The Sika BPO Cream Hardener Red 1oz Tube is a benzoyl peroxide (BPO) catalyst engineered for rapid curing of amine-accelerated polyester resins and fillers. This product is essential for professionals and hobbyists working with fiberglass repair, composite layups, and resin-based molding applications. The compact 1-ounce tube format delivers precise metering, making it ideal for both large-scale production work and small repair jobs where accuracy and speed are critical.

BPO functions as a peroxide initiator that triggers exothermic polymerization in polyester systems, enabling fast hardening and demold capability even at low ambient temperatures. Unlike other hardening catalysts, the cream formulation in this tube provides consistent dispersion throughout the resin matrix, reducing the risk of incomplete cure or soft spots in finished parts. The red pigment facilitates visual mixing verification, helping users confirm thorough blending before application. This formulation is engineered to work specifically with amine-accelerated polyester resins, requiring no separate promoter in most standard resin systems.

Technicians, repair shops, composite manufacturers, and marine or automotive restoration specialists rely on this hardener for time-sensitive projects requiring predictable cure schedules. It performs optimally when mixed at manufacturer-recommended ratios—typically 1–2% by weight depending on desired cure time and ambient conditions. Always follow the resin manufacturer's specifications and safety guidelines, as benzoyl peroxide is a reactive chemical requiring proper ventilation, protective equipment, and storage in cool conditions. This 1oz tube is designed for use with polyester resins only; verify compatibility with your specific resin product before application.