SikaBiresin AP077 White Quart is a fast-setting polyester filler and fairing compound designed for surface repairs on boats and composites, usable above or below the waterline.
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Color / Size: White, Quart
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Material: Polyester filler and fairing compound designed for easy sanding and feather-edge finishes
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Waterline compatibility: Suitable for repairs above and below the waterline on boats and composites
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BPO hardener: Requires BPO hardener for cure
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Application: Applies smoothly with a squeegee, spatula, or flat tool
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Finish: Finishes to a feather edge and accepts virtually any coating or decorative film after curing
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Adhesion: Exceptional adhesion to fiberglass, SMC, FRP, epoxy, graphite, Kevlar®, aluminum, wood, and other substrates
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Cure speed: Very quick setting and fast cure
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Shrinkage / Temperature: Minimal shrinkage; high service temperature capability
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Moisture resistance: Low moisture absorption
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Versatility: Gel coat blister repair, fiberglass parts repair, cloth imprint filling on FRP panels
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Manufacturer / Part: Manufactured by Sika; Part number 609801
This AP077 formulation yields a smooth, workable paste that cures quickly, accelerating repairs and final finishing. The feather-edge finish minimizes heavy blocking, leaving a seamless surface ready for coatings. With exceptional adhesion to a wide range of substrates and low moisture absorption, it performs reliably in both above-waterline and below-waterline environments. Its minimal shrinkage helps maintain surface integrity during curing, while the easy sanding characteristic supports fast, efficient work. Suitable for gel coat blister repair, fiberglass parts repair, and cloth imprint filling on FRP panels, it offers a versatile, durable solution for marine and composite projects.
