Bitumen Primer – Black – Roofing & Building

Product Overview

The Industrial Grade Bitumen & Flashing Primer in a 1-litre tin is a thin black primer designed to provide a strong key for subsequent bituminous coatings, paints, and flashing tapes. Ideal for roofing and general building substrates, it enhances adhesion and supports the performance of applied bitumen layers in both waterproofing and refurbishment works.

Suitable for use on concrete, cementitious screeds, renders, bitumen felt, asphalt, mastic, timber, and weathered metal surfaces, this primer ensures a consistent preparation layer across various roof and structural surfaces. It forms a controlled film on metal and penetrates deeply into porous substrates, supporting even application and predictable bonding behavior.

Brush or spray application is possible, and the primer dries rapidly in favorable weather conditions, providing a clean, receptive base for bituminous paints, roof coatings, and flashing membranes. The formulation adheres effectively to both porous and non-porous substrates, with higher saturation achievable on fiber cement or rag felt where deeper penetration is required.

Features & Benefits

• Fast drying: Forms a receptive surface within 3–6 hours depending on weather conditions.
• Prepares surfaces for bituminous products: Improves adhesion for bitumen paints, coatings, and flashing tapes.
• Compatible with multiple substrates: Suitable for concrete, asphalt, felt, wood, and weathered metals.
• Controlled film formation: Provides 0.1mm wet and 0.05mm dry film thickness at 11m²/L for uniform priming.
• Brush or spray application: Allows flexible use on small or detailed roof and building surfaces.
• Container size: 1 litre is ideal for localized priming, detailing work, and small roof preparation tasks.

Applications

• Roof surface priming: Prepares concrete, cementitious screeds, and renders for bituminous coatings.
• Bituminous membrane preparation: Suitable for use on bitumen felt, asphalt, and mastic surfaces.
• Timber and metal priming: Used on wood and weathered corrugated metal to enhance coating adhesion.
• Flashing tape preparation: Acts as a bonding primer before applying flashing tape.

Installation Guidance

• Surface preparation: Ensure all areas are dry, stable, and cleaned free from dust, dirt, grease, and loose material.
• Metal conditioning: Remove rust by wire brushing and prime separately with a rust-inhibitive primer where necessary.

FAQ

• How quickly does the primer dry? The primer dries within 3–6 hours under optimal weather conditions.
• What surfaces can this primer be used on? It is suitable for concrete, asphalt, felt, wood, and weathered metals.
• Can the primer be applied with a brush? Yes, it can be applied using a brush or spray for flexible application.