Sika Primer-209 D Black Bonding Primer - 250ml

The Sika Primer-209 D Black Bonding Primer - 250ml is a black, pigmented solvent-based primer used to prepare compatible bonding surfaces before selected Sika one-component polyurethane adhesives are applied. The primer reacts with moisture to form a thin interfacial layer that helps connect the substrate surface to the adhesive system.

Its intended substrates vary by primer formulation and can include glass, coated glass, plastics, painted surfaces, pre-coatings, metals, epoxy or GRP materials. Because plastics, paints, and stress-sensitive materials can respond differently, the manufacturer requires testing on the actual substrate and production conditions before relying on the bond.

This is a professional surface-preparation product, so application should follow Sika’s specific cleaning, shaking, coating, flash-time, and compatibility guidance for the chosen adhesive system. Apply only a thin covering coat and avoid assuming that one primer is interchangeable with another simply because both are black bonding primers.

• The primer creates an intermediate layer between the substrate and selected Sika adhesive systems.
• Each formulation is intended for a defined range of plastics, coatings, glass, metals, or composite surfaces.
• Thin-coat application and substrate testing help produce more predictable adhesion results.
• Testing on the actual material is important because coatings and plastics can vary significantly.

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