Roof Repair Compound – Waterproof – Exterior

Product Overview

The High-Performance Roof Repair Compound in grey is available in a 2.5kg one-coat format, designed to provide instant waterproofing on a variety of common roofing substrates. Its resin-based, fiber-reinforced formula allows for application even in wet conditions, ensuring leaks are sealed immediately without the need for dry surfaces.

The compound features high fiber reinforcement, which bridges small cracks and forms a continuous, flexible membrane capable of withstanding thermal movement and surface ponding. Made with lightfast acrylic polymers, it offers superior UV resistance compared to traditional bitumen-based coatings, making it a reliable choice for long-term roof maintenance.

This product adheres without the need for a primer to most non-porous roofing materials, including felt, mastic asphalt, metals, slates, tiles, rigid uPVC, and fiber-cement sheets. Its brush-grade viscosity ensures even distribution and complete coverage in a single coat, with a recommended yield of approximately 0.75m² per kilogram.

Suitable for emergency repairs and general refurbishment, it can be applied within a temperature range of -5°C to +35°C, forming an instantly waterproof surface upon application with full drying taking 6-7 days depending on the film thickness and ambient conditions. The 2.5kg size is ideal for medium-scale repairs and extensive waterproofing projects.

Features & Benefits

• Instant waterproofing: Creates a waterproof membrane immediately, ideal for emergency leaks.
• Wet-surface application: Effective on damp and wet surfaces, even during rainfall.
• Fiber-reinforced formulation: Bridges small cracks for a durable, strengthened membrane.
• Lightfast acrylic polymers: Greater sunlight resistance than bitumen coatings.
• Primerless adhesion: Bonds to most substrates without primer.
• Flexible temperature use: Effective from -5°C to +35°C.
• Single-coat coverage: Provides complete waterproofing in one application.
• Container size: 2.5kg suitable for medium-sized areas.

Applications

• General roof repair: Suitable for concrete, roofing felt, fiber-cement, bituminous coatings, mastic asphalt, and metals.
• Emergency leak sealing: Instant waterproofing for active leaks.
• Detailing and junctions: Ideal for complex roof areas.

Frequently Asked Questions

• Can this product be applied in the rain? Yes, it is designed for application on wet surfaces and remains effective in ongoing rainfall.
• How long does it take to fully dry? Full drying occurs over 6-7 days, depending on conditions.
• Is a primer needed before application? No, it adheres to most surfaces without a primer.