Rust-Oleum Mathys Dacfill Waterproofing - Seamless Membrane for Roofing Dacfill is a water-based liquid membrane designed for the waterproofing of roofs. It forms a seamless, elastic coat that provides excellent waterproofing for sloped roofs, with a minimum slope of 5%. Resistant to harsh weather conditions including UV radiation, acid rain, heat, and frost, ensuring long-lasting protection. Ideal for roofs, chimney slabs, and other surfaces that require a robust waterproof layer. Features 100% watertight with high-build coating properties. Abrasion-resistant, rubber-like coat without joints or seams. Self-extinguishing and hardly flammable. Can be reinforced with Dacfill-fleece for added durability. Application Instructions Before applying Dacfill, ensure the surface is clean, dry, and free from any debris. For surfaces like roofing or bituminous materials over one year old, Dacfill can be applied directly. For metals such as zinc, galvanised steel, copper, lead, and aluminium, degreasing and slight sanding are recommended before application. Always stir the product thoroughly before use. Limitations Not suitable for roofs with a slope less than 5% without Dacfill-fleece reinforcement. Do not apply on tar, soft PVC, or bituminous materials less than one year old. Avoid use on surfaces where water stagnation is frequent without proper reinforcement. Not designed for immersion purposes. Recommendations For added protection and durability, use Dacfill in combination with Dacfill-fleece, especially on roofs with slight slopes or potential water stagnation areas. Regular maintenance and inspection of the roof coating will ensure longevity and optimal performance.