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

1. 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)
2. Biological Control: Apply Kingfisher Biocidal Wash to treat and inhibit moss or algae before sealing
3. 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
4. Crack Bridging: For joints or cracks, embed fibre mesh or fleece between coats, ensuring air pockets are eliminated
5. 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.