Cromar Cromaprufe

• Suitable For: use as a waterproof membrane for concrete and brick foundations
• Area of use: EXT
• Application Method: brush
• Volume: 5L 25L
• Container Type: tin
• Type: waterproofer
• Colour: vrown (dries black)
• Brand: Cromar
• Manufactuer: Cromar
• Box Size: Single Box

Cromar Cromaprufe serves as a waterproof membrane for concrete and brick foundations, retaining walls, and bridge abutments, effectively shielding them against water penetration. It offers protection against sulphate attack from soil. Additionally, Cromaprufe functions as a versatile waterproofer for both floors and walls. Moreover, it demonstrates excellent adhesive properties, facilitating the bonding of wood block and wood mosaics, expanded polystyrene, and cork tiles. Furthermore, Cromaprufe provides a suitable surface for plaster application on challenging surfaces.

APPLICATION

• Surface Preparation:
  • Ensure all surfaces are sound, stable, and free from dust, dirt, grease, oil, and loose matter.
  • Cromaprufe can be applied to damp surfaces, but not waterlogged ones.
  • Porous and hot dry surfaces should be dampened with clean cold water prior to application to assist with product application.
• Application Instructions:
  • Stir Cromaprufe well before use and apply it by brush.
  • Avoid applying Cromaprufe to external surfaces during wet weather or if rain is expected, and ensure good ventilation in confined areas.
  • Allow each coat to dry completely before applying the next coat in multi-coat applications.
• Waterproofing and Protection:
  • Apply 2 coats of Cromaprufe at a rate of 2m² per liter for waterproofing structures such as foundations, retaining walls, and bridge abutments.
  • Ensure the coating extends to meet the damp-proof course in the base or wall when treating foundations.
  • Cromaprufe can be applied to green concrete surfaces immediately after shuttering removal to serve as a curing membrane, with 48 hours recommended before back-filling.
• Concrete Beams and Columns:
  • Apply 2 coats of Cromaprufe at a rate of 2m² per liter to provide a damp-proof membrane on concrete beams and columns before cladding with rendering, masonry, or brickwork.
  • After the second coat becomes tacky, blind it with 1 to 2 mm stone chippings or clean sharp sand.
• Walls:
  • Address rising dampness by inserting a damp-proof course or repairing the existing one if suspected.
  • For exterior walls, remove dirt, dust, and grease, level uneven surfaces with cement mortar, and apply three coats of Cromaprufe at a rate of 2m² per liter, with the final coat blinded with clean sharp sand while tacky.
• Interior Walls:
  • Remove wallpaper, loose paint, dirt, dust, and grease, and repair damaged plaster.
  • Apply two coats of Cromaprufe at a rate of 2m² per liter to moderately damp interior walls, leaving a section untreated for moisture evaporation.
  • Avoid using gloss paints or oil-based products for decoration over Cromaprufe; instead, use emulsion paints and wallpapers after hanging a lining paper fixed with cellulose paste.
• Floors:
  • For sandwich construction in severe conditions with penetrating damp, apply two coats of Cromaprufe at a rate of 1m² per liter to a clean concrete subfloor, and blind the second coat with clean sand.
  • Take the Cromaprufe membrane up walls to marry with the damp-proof course and ensure it remains intact before laying a floor covering.
• Surface Treatment on Existing Floors:
  • Apply a priming coat of diluted Cromaprufe at a rate of 7.5m² per liter, followed by two coats at a rate of 1m² per liter, ensuring each coat reaches the existing damp-proof course.
  • Do not use Cromaprufe as the final surface for pedestrian traffic; it should always be covered by a suitable floor covering material.
• Wood Blocks and Wood Mosaics Adhesive:
  • Treat the floor as described above if damp conditions are expected.
  • Prime the surface lightly with clean cold water, then dip wood blocks separately into Cromaprufe and press firmly into place, excluding air.
  • For wood mosaic panels, spread Cromaprufe onto the screed at a rate of 0.8m² per liter and immediately place the panels into position.
• Plastering on Difficult Surfaces:
  • Apply two thin layers of Cromaprufe at a rate of 4.5m² per liter each to surfaces with poor keying properties, such as gloss-painted walls or old tiles.
  • Blind the second coat with clean sharp sand while tacky and allow it to dry for 48 hours before plastering according to plaster manufacturers’ recommendations.