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Sikalastic®-1KVendor:
Sikalastic-1K is a one-component, fibre-reinforced flexible cementitious waterproofing mortar for concrete protection and wet-area waterproofing. Mix with water and apply by brush, trowel or suitable spray equipment over correctly prepared mineral substrates.Waterproofing on concrete and masonryUse Sikalastic-1K for bathrooms and showers beneath tiles, balconies...- $213.07
- $213.07
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Gripset 2PVendor:
Gripset 2P is a two-part flexible cementitious waterproofing membrane for under-tile, immersed and subterranean applications. It combines cement-based durability with flexibility, high adhesion and fast drying for wet areas, balconies, pools, tanks, planter boxes and retaining structures. Why choose 2P? Its two-part cementitious system...- $188.44
- $188.44
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Gripset C-1PVendor:
Gripset C-1P is a one-part, fibre-reinforced flexible cementitious waterproofing membrane for positive and negative waterproofing. It is designed for concrete and masonry structures, under-tile areas, basements, retaining walls, pools and water-retaining structures, including applications subject to hydrostatic pressure. When C-1P is the right choice:...
- $166.30
- $166.30
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RLA 2 Part Cementitious Waterproofing MembraneVendor:RLARLA 2 Part is a flexible two-component cementitious waterproofing membrane for suitably prepared wet areas and external surfaces beneath compatible tile or protective finishes. It is designed for construction projects needing a cement-based waterproofing system, with specific detailing and curing requirements for pools and...
- $251.23
- $251.23
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Frequently Asked Questions
What is a cementitious waterproofing membrane?
A cementitious waterproofing membrane is a polymer-modified cement coating that provides a rigid waterproof barrier. Unlike liquid membranes, cementitious membranes are not flexible and must be covered with tiles, screed, or backfill. They suit wet areas, pools, and tanks.
Can I apply a cementitious membrane inside a basement?
Yes. Gripset C-1P and Sikalastic-1K both resist negative water pressure and suit the inside face of retaining walls and basement slabs. Gripset C-1P resists 1.5 bar negative pressure. Sikalastic-1K resists 2.5 bar negative pressure.
Which cementitious membranes are safe for drinking water tanks?
Gripset C-1P, RLA 2 Part Cementitious, and Sikalastic-1K all hold AS 4020 approval for contact with potable water. Use them for concrete rainwater tanks and reservoirs. All three suit immersion service.
Do cementitious membranes bridge cracks in the substrate?
Gripset C-1P and Sikalastic-1K both bridge cracks up to 0.75 mm. Cementitious membranes rely on their polymer content for crack bridging. For wider crack movement, consider a Class III liquid membrane with higher elongation.
What is the difference between single-component and two-part cementitious membranes?
Single-component products such as Gripset C-1P and Sikalastic-1K mix with water only. Two-part products such as Gripset 2P and RLA 2 Part need a liquid polymer additive. Two-part membranes tile in 24 hours. Single-component products need longer immersion cure.