- Suitable For: damp-proof membranes for floors
- Area of use: INT & EXT
- Application Method: brush
- Time to full cure: 4-6 hours
- Volume: 5L
- Container Type: tin
- Type: bitumen paint
- Colour: black
- Brand: Everbuild
- Manufactuer: Sika
- Box Size: 1
Data Sheets
EVERBUILD BLACK JACK 908 D.P.M. is a versatile, rubber-enriched bitumen emulsion designed for use as an effective sandwich damp proof membrane for floors. It also serves as a waterproofer for walls, above-ground structures, and foundations. Additionally, it works as an adhesive for various materials, including wood blocks, mosaic panels, insulation boards, expanded polystyrene, cork, and even as a plaster bonding agent on challenging surfaces. The product creates an impervious barrier to water and water vapor on most surfaces.
Key Points:
- Suitable for internal or external applications.
- Can be used as an adhesive or bonding aid.
- Low hazard with easy water cleanup.
- Low odor once cured.
For all other Everbuild products on our website, please click here. For more in our Roofing range, please click here.
For any further information on any of Everbuild’s products, please visit their website here.
Everbuild Black Jack is ideal for the following applications:
SUBSTRATE PREPARATION
Before application, stir well. The product is brown when wet and dries black. Ensure all surfaces are clean, dry, sound, and free from contaminants that could affect adhesion. Base concrete should be finished with a wooden float for a smooth surface, as tamped surfaces may prevent proper coverage. Prime porous surfaces with Everbuild® 503 SBR Bond diluted 1:4 with water, then allow to dry. All work should comply with BS Code of Practice 102: 1973, Section 3 – Protection of Buildings from the Ground.
APPLICATION INSTRUCTIONS
Damp-Proofing Floors
- Apply a minimum of 2 coats with a brush at 0.8 L/m².
- Extend the treatment up walls to join the wall DPC.
- Allow the first coat to dry before applying the second at right angles.
- Once dry, cover with a 50 mm sand/cement or concrete screed.
Waterproofing Walls
- Exterior walls: Level uneven surfaces, then apply 3 coats at 0.5 L/m² with a soft brush, allowing each coat to dry. Blind the final tacky coat with sharp sand.
- Interior walls (moderately damp): Prepare the surface by removing wallpaper and loose paint, repair plaster, and apply 3 coats at 0.5 L/m², leaving a 300 mm uncoated strip at the top for evaporation.
- Interior walls (very damp): Remove old plaster, repair masonry, and apply 3 coats at 0.5 L/m². Replaster after the final coat is dry.
Waterproofing Structures
- Use on bridge abutments, retaining walls, culverts, and foundations. Apply 2 coats at 0.5 L/m² to sound, dust-free surfaces.
Fixing Wood Blocks and Mosaics
- Wood blocks: Dip blocks into the product and place immediately (coverage: 1.1 L/m²).
- Wood mosaics: Spread at 0.8 L/m² and place panels immediately. Wait 24 hours before use.
- Underfloor heating: Turn off heating 48 hours before and after application.
Plaster/Render Bonding
- Apply 2 coats at 0.25 L/m². Blind the second coat with dry sand before plastering/rendering (48-hour curing). For gloss/alkyd finishes, ensure a 15 mm plaster thickness.
Fixing Insulation Boards, Polystyrene, and Cork
- Apply the product to the base and press insulation materials into the wet coating. Support boards if needed until the product sets.
DECORATING
Avoid using gloss, oil, or alkyd-based paints on treated surfaces. For plaster-treated areas, use lining paper with cellulose paste before painting or wallpapering. Do not use vinyl-coated papers.
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Elementlength | |||||||
up to 1,5 m |
up to 2,5 m |
up to 3,5 m |
up to 4,5 m |
up to 2,5 m |
up to 3,5 m |
up to 4,5 m |
|
Type of window frame material |
Minimum witdth of joints for a butled mounting b in mm |
Minimum witdth of joints for a inner mounting b in mm |
|||||
Hard PVC (white) | 10 | 15 | 20 | 25 | 10 | 10 | 15 |
Hard PVC and PMMA (dark) (colour extruded) |
15 | 20 | 25 | 30 | 10 | 15 | 20 |
Hard PUR integral foam | 10 | 10 | 15 | 20 | 10 | 10 | 15 |
Wood-aluminium-window | 10 | 10 | 15 | 20 | 10 | 10 | 15 |
Aluminium-plastic sandwich frame (bright) |
10 | 10 | 15 | 20 | 10 | 10 | 15 |
Aluminium-plastic sandwich frame (dark) |
10 | 15 | 20 | 25 | 10 | 10 | 15 |
Wooden window frame | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
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