Fosroc Supercast SW30, 5m, Swellable Waterstop Strip for Waterproof Concrete Joints

Fosroc Supercast SW30 (5m) is a waterproofing and protective coating system for concrete and masonry structures. It combines a high-build elastomeric basecoat with a flexible, crack-bridging topcoat and is supplied as a 5-meter-long, single-component self-adhesive membrane. It forms an impermeable barrier that protects the substrate from water ingress, dampness, and chemical exposure, making it suitable for below-ground applications.

SW30 is designed for concrete and masonry substrates. It can also be applied to compatible surfaces that are clean, dry, and structurally sound, including certain types of wood and metal cladding when permitted by Fosroc guidance. Always prepare the substrate per Fosroc recommendations for best adhesion and performance.

Key features include: 5-meter length per roll, single-component self-adhesive membrane, elastomeric basecoat with a flexible, crack-bridging topcoat, breathable membrane that lets water vapor escape while preventing liquid water ingress, and an impermeable barrier to protect against dampness and chemical penetration. It is designed for easy installation and effective protection of below-ground structures.

General installation steps: (1) Prepare the substrate to be clean, dry, and sound. (2) Cut the membrane to the required length. (3) Peel back the release film and apply the self-adhesive membrane onto the substrate, starting from one edge. (4) Use a roller to ensure full contact and eliminate air pockets. (5) Seal seams and overlaps with appropriate seam tape or detailing as recommended by Fosroc. (6) Inspect the applied membrane for full adhesion and continuity. Always follow the specific installation guide provided by Fosroc for your project.

SW30 is ideal for below-ground structures and damp-prone areas such as foundations, basements, retaining walls, tunnels, and other concrete or masonry elements that require durable waterproofing and protection from dampness, weathering, and chemical exposure.

Yes, SW30 is described as a breathable membrane. This means it allows water vapor to escape from the wall or substrate while blocking liquid water ingress. This helps prevent interior dampness, mould growth, and moisture-related damage without trapping moisture inside the wall.

Handle SW30 with standard PPE for construction adhesives and waterproofing products: gloves, eye protection, and suitable clothing. Work in a well-ventilated area, keep away from heat sources as a precaution, and follow the Material Safety Data Sheet (MSDS) and any local regulations. Ensure the substrate is prepared per Fosroc guidelines to minimize exposure risks and maximize performance.

SW30 is designed to provide long-term waterproofing and substrate protection. When installed correctly on suitable substrates and under appropriate service conditions, it helps prevent water ingress, dampness, mould and mildew, and protects the structural elements from moisture-related deterioration. Periodic inspections of the membrane for damage or seam integrity are recommended as part of routine maintenance.

If you’re considering alternatives on Fepy, you can compare these options (all available on Fepy): - Fosroc Supercast SW52 (5m): https://fepy.com/product/fosroc-supercast-sw52-5m A different SW series membrane from Fosroc with similar self-adhesive, breathable properties suitable for damp environments. - Sika Waterproofing Membrane – Sikaplan GT 1.0 (5m): https://fepy.com/product/sika-sikaplan-gt-1-0-5m A Sika solution offering a flexible waterproofing membrane with comparable adhesion and seam integrity. - MAP Aqualine Waterproof Membrane (5m): https://fepy.com/product/map-aqualine-waterproof-membrane-5m An alternative membrane with similar waterproofing performance for below-ground and damp-prone areas. These options provide similar protective functions; check each product’s substrate compatibility, breathability, and seam details to select the best fit for your project.

Fepy’s return policy applies to this product. If you need to return SW30, please refer to Fepy’s stated policy on returns for hardware and building materials. Ensure the item is in acceptable condition per the policy terms and initiate a return within the applicable time frame.