Sika SikaBiresin AP112 Fibrous Filler Compound

The Sika SikaBiresin AP112 Fibrous Filler Compound is a professional polyester repair compound for composite and marine fabrication work. Its fibrous, thixotropic formulation is intended for deeper rebuilding, bonding, and filling where additional structural body is useful before final surfacing.

The compound gives strong adhesion, quick setting, and minimal shrinkage on compatible substrates. Typical uses include rebuilding broken or voided composite areas, bonding FRP, installing metal inserts, and making deeper repairs before a separate fairing step.

BPO hardener is required for the listed product, and correct mixing is essential for cure and working characteristics. Prepare the substrate according to the manufacturer’s instructions, mix only the amount that can be applied within the working time, and allow the repair to cure fully before sanding, machining, coating, or placing it into service.

• The compound is formulated for strong adhesion with minimal shrinkage during cure.
• Fibrous reinforcement makes the material useful for void filling, bonding, and deeper composite repairs.
• Fast cure can reduce waiting time between filling, sanding, and later finishing steps.
• Once cured, the material can be sanded, machined, and finished according to the specific product guidance.

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