Kingfisher Fibreseal Roof Repair Compound – Grey

Reinforced, Instant-Setting Roof Sealant for Emergency and Long-Term Repairs. Kingfisher Fibreseal is a professional-grade, solvent-based acrylic repair compound formulated to deliver instant waterproofing for roofs, gutters, flashings, and cladding. Engineered with built-in fibrous reinforcement, it bridges small cracks and gaps, forming a tough, flexible membrane even in damp or wet conditions.. Its thixotropic grey formula ensures excellent workability on vertical and sloped surfaces without sagging, and cures to a weather-resistant, semi-gloss finish. Fibreseal is ideal for emergency repairs and planned refurbishments across residential, industrial, and agricultural buildings.. Key Features & Benefits. Instant Waterproof Seal: Stops leaks immediately—even in the rain. Built-in Fibre Reinforcement: Flexible and crack-bridging for added durability. All-Weather Application: Suitable for use in wet, damp, or dry conditions. UV-Stable & Weatherproof: Resists embrittlement and degradation from sunlight. Multi-Surface Compatibility: Bonds to felt, slate, asbestos sheets, metal cladding, lead, concrete and more. Semi-Gloss Finish: Clean, uniform grey coating that enhances appearance. Ideal For. Flat or pitched roof leak repairs. Cracked flashings or felt overlaps. Gutter joints and valleys. Temporary or permanent detailing around chimneys and roof windows. Industrial roofing and sheet metal waterproofing. Product Details. Colour: Grey. Finish: Flexible, semi-gloss film. Pack Sizes: 5 kg or 20 kg. Cure Time: Initial cure in 24 hours, full cure in 72 hours (at 20 °C). Coverage: 1–2 m² per litre for single thick coat or 0.5 m² per litre for two thin coats. Application Temperature: +5 °C to +30 °C. Service Temperature: –20 °C to +70 °C. Shelf Life: 9 months from manufacture (sealed, cool dry storage). Application Instructions. Surface Prep: Remove dirt, grease, and loose debris. Do not apply to frosty or greasy surfaces. Power wash if required (avoid high-pressure on asbestos). Biological Control: Apply Kingfisher Biocidal Wash to treat and inhibit moss or algae before sealing. Application: Stir well and apply with a stiff-bristled brush or heavy-duty roller. Apply in one thick or two thin coats, depending on the area and porosity. Crack Bridging: For joints or cracks, embed fibre mesh or fleece between coats, ensuring air pockets are eliminated. Drying: Allow 24 hours for surface cure; longer in cooler or humid conditions. Apply second coat once first is fully cured. Compatibility Notes. Suitable substrates: Felt, concrete, slate, fibre cement, bitumen, lead, metal sheeting, and corrugated asbestos. Unsuitable for: Plastic, timber, or freshly poured concrete without priming. Can be overcoated after full curing with selected acrylic or elastomeric topcoats. Tools & Safety. Recommended Tools: Heavy-duty brush or roller; not suitable for spray. Clean-Up: Use white spirit immediately after use. PPE: Wear gloves and protective eyewear; ensure good ventilation during use. Kingfisher Fibreseal is the trusted solution for roofing professionals and DIYers alike—delivering high-performance waterproofing in all conditions, with minimal surface preparation.