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Sika® Black Jack®-902 Bitumen & Flashing Primer

Primer used to give a key prior to applying bitumen paints

Sika® Black Jack®-902 Bitumen & Flashing Primer is a thin black primer used to give a key prior to applying bitumen paints, roof coatings and flashing.

  • Fast drying.
  • For use with all bituminous coatings.
  • Film thickness per coat at 11 m2/L - wet 0.1 mm.
  • Film thickness per coat at 11 m2/L - dry 0.05 mm.
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Product Data Sheet Show all documents

Usage

Mainly used for priming:
  • Concrete roofs and floors, cementitious screeds and renders.
  • Bitumen felt, asphalt and mastic.
  • Wood.
  • Weathered corrugated iron and steel.
  • Also suitable as a primer prior to applying Black Jack® Flashing Tape.  

Advantages

  • Fast drying.
  • For use with all bituminous coatings.
  • Film thickness per coat at 11 m2/L - wet 0.1 mm.
  • Film thickness per coat at 11 m2/L - dry 0.05 mm.

Packaging

1 L and 5 L tins.

Product Details

Product Information

Chemical Base

White spirit.

Shelf Life

24 months from date of manufacture in unopened and undamaged containers.

Storage Conditions

Contains a flammable solvent and all precautions against fire must be taken during storage.  Store between +5 and +25 °C.  

Density

ca. 0.9 g / cm3 at +20 °C.
Technical Information

Chemical Resistance

Resistant to: most salt solutions, dilute acids and alkali, and water.
Not resistant to: oils, solvents and some detergent solutions. 
If not sure, check first in an inconspicuous area.

Service Temperature

-20 °C to +50 °C (must be over coated).

 

Application

Application Information

Ambient Air Temperature

+5 ºC to +40 °C. Surfaces must be free from ice and water.

Substrate Temperature

+5 °C to +40 °C. Surfaces must be free from ice and water.

Drying time

3 - 6 hours depending on drying conditions.
Consumption

Yield

Approx. 4-6 m² per litre depending on porosity of substrate.
Approx. 11 m² per litre on non-porous surfaces.
Application steps

SUBSTRATE PREPARATION

All surfaces must be dry, stable and thoroughly cleaned to remove all traces of dirt, dust and grease. Wet surfaces should be brushed free from water and wiped with a dry cloth to remove any moisture which remains. Repair cracks and holes using Black Jack® 903 Bitumen Trowel Mastic, stick down loose felt etc. with Black Jack® 904 Roof Felt Adhesive.

 

Metal surfaces should be wire-brushed to remove rust. Where long-term protection is required an initial treatment of a rust-inhibitive product such as red lead or zinc phosphate should be used. Loose or blistered paint should be removed, as should tar-based paint systems. New galvanised surfaces should be roughened with a wire brush or treated with a proprietary etch primer. Where there is green growth present, clean surfaces with Sika® Mould Buster as directed, before proceeding.

APPLICATION

Sika® Black Jack®-902 Bitumen & Flashing Primer is ready for use and should not be thinned. Stir thoroughly before and during use. Apply by brush or spray. The primer should be well scrubbed in by brush, ensuring a thin even coverage. Avoid ponding/pooling when applying by spray. With fibre-cement or rag felt, apply generously to saturate the surface.

CLEANING OF TOOLS

All tools should be cleaned immediately after use with Sika® Wonder Wipes or white spirit. Any spillage should be wiped off surfaces before the bitumen paint has set.

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