Sika SikaBiresin AP077 Polyester Fairing Compound

Sika SikaBiresin® AP077 is a polyester filler and fairing compound that offers a smooth, workable paste with a fast cure to speed up repair or finish applications. It is designed for boaters and fabricators who need a compound that's easier to sand than conventional fillers and finishes to a feather edge.

It can be applied easily with a squeegee, spatula, or flat tool, and once cured, accepts virtually all types of coatings and decorative films. It's ideal for gel coat blister repair, fiberglass parts repair, and filling cloth imprint on FRP panels, with excellent adhesive and bond strength to fiberglass, SMC, FRP, epoxy, graphite, Kevlar composites, aluminum, and wood. Requires BPO hardener, sold separately. Browse more options in our cleaning, detailing, and protection category.

Key Features

• Smooth, workable paste spreads easily without dragging or clumping.
• Fast cure gets you to the sanding stage sooner.
• Sands easier than conventional fillers, cutting down on prep time.
• Finishes to a feather edge for a seamless transition into surrounding gelcoat.
• Exceptional adhesion with minimal shrinkage keeps repairs from cracking or pulling away later.
• Accepts all coating types once cured, so it won't limit your topcoat options.

Frequently Asked Questions

Does this require a hardener? Yes, BPO hardener is required and sold separately.

What is this compound used for? Gel coat blister repair, fiberglass parts repair, and filling cloth imprint on FRP panels.

What substrates does this bond well to? Fiberglass, SMC, FRP, epoxy, graphite, Kevlar composites, aluminum, and wood.