Gripset C-1P - 1 Part Flexible Cementitious Membrane 15Kg

Gripset C-1P is a one-component, flexible, fibre-reinforced cementitious waterproofing membrane. Its unique formulation, combining a cementitious base with graded aggregates and polymers, creates a highly flexible membrane capable of withstanding significant flexural strain, making it suitable for 5 bar positive and 1.5 bar negative water pressure.

Uses & Applications

• Under-tile waterproofing for internal wet areas (bathrooms, showers, laundries, kitchens, toilets).
• Planter boxes and retaining walls.
• Under-tile or wearing systems on rooftops, balconies, and podiums.
• Waterproofing concrete shelves.
• Concrete swimming pools, water features, and potable water storage.
• Areas subject to 5 bar positive and 1.5 bar negative hydrostatic pressure.

Suitable Substrates

• Cement-rendered masonry
• Fibre cement sheeting
• Concrete
• Water-resistant plasterboard
• Structural plywood

Benefits

• Easy application by brush, roller, or trowel.
• Applicable to damp surfaces.
• High adhesion strength.
• Versatile mixing ratio.
• Good crack-bridging capabilities (up to 0.75mm in standard and low temperatures).
• Suitable for light foot traffic.
• Class One membrane.

Application Guide

1. Surface Preparation:
   • Thoroughly clean the surface using methods like blast cleaning, high-pressure water jetting, wire brushing, or grinding to remove existing coatings, contaminants, and laitance.
   • Ensure the substrate is damp but not saturated before application.
   • Allow new concrete and render to cure for at least 28 days.
   • For optimal adhesion, apply by trowel for consistent coverage.
   • Treat and fill static cracks up to 2mm wide with GRIPSET SB.
   • Consult a professional for cracks over 2mm or those subject to movement.
2. Priming:
   • Porous Substrates: Dampen the substrate before application.
   • Non-Porous Substrates: Mechanically abrade (sanding/grinding) and then dampen the surface.
3. Mixing:
   • Add powder to water while mixing with a mechanical stirrer.
   • Adjust water ratio (3.0 - 4.2 litres per 15kg bag) for desired consistency.
4. Application:
   • Apply two coats with a minimum wet film thickness of 1.5mm per coat.
   • Allow 4-6 hours of drying time between coats.
   • Ensure a final dry film thickness of 2-3mm.
   • Use a wet film gauge to ensure adequate coverage.

Limitations

• Not suitable for heavy or continuous traffic.
• Not to be applied over lightweight concrete.
• Avoid application in temperatures below 5°C and above 35°C.
• External applications covered with tiles or screed require a separation layer.

Additional Information

• Shelf life of 12 months in original unopened packaging.
• Available in 15kg poly-lined bags.
• Product data available for adhesion, water resistance, crack bridging, etc.

Additional Product Downloads:

• Download TDS
• Download SDS