Everbuild Black Jack 902 Bitumen & Flashing Primer 1L

Everbuild® Black Jack® 902 Bitumen & Flashing Primer – 5 L

Thin, solvent-based black primer supplied in a 5 L tin, formulated to provide a solid key for bitumen paints, roof coatings, and flashing systems. It ensures superior adhesion on a wide variety of substrates.

Key benefits

• Fast drying—typically touch-dry within 3–6 hours depending on conditions.
• Provides excellent keying for all bituminous coatings.
• Produces a consistent film with coverage up to 11 m² per litre on non-porous surfaces, around 4–6 m² per litre on porous substrates.

Typical applications

• Priming before application of bitumen paint or flashing tape.
• Works effectively on concrete roofs, screeds, renders, bitumen felt, asphalt and mastic, wood, and weathered corrugated iron or steel.

Usage guidance

• Surfaces must be clean, dry, stable, and free from contaminants, rust, paint or tar residues.
• Product is ready to use—do not thin. Stir thoroughly before and during application.
• Apply by brush or spray, thoroughly scrubbing in to ensure even, thin coverage; avoid pooling.
• Allow to dry fully before applying bituminous topcoat or flashing tape.
• Clean tools immediately after use using white spirit or Sika Wonder Wipes.

Product details

• Pack size: 5 L tin (also available in 1 L size).
• Chemical base: White spirit (solvent-based).
• Drying time: 3–6 hours, depending on ambient conditions.
• Coverage: Approx. 11 m² per litre on non-porous surfaces, 4–6 m² per litre on porous ones.
• Density: Around 0.9 g/cm³ at 20 °C.
• Service temperature range: –20 °C to +50 °C (must be overcoated).
• Shelf life: Up to 24 months from manufacture when stored in unopened, well-sealed containers at 5–25 °C; flammable—store with applicable fire precautions.

Good to know

Not resistant to oils or aggressive solvents, so test compatibility in inconspicuous areas before use. Ensure adequate ventilation during application, and inspect overcoating compatibility before covering.