Bituminous paint
Bituminous paint is a solvent-based black coating used to waterproof, weatherproof and protect a wide range of surfaces. Applied to metal, concrete, brick, stone, wood and felt, it dries to a tough, flexible black film that keeps water out and slows corrosion, which makes it one of the most cost-effective protective coatings for exterior and below-ground work.
From gutters and downpipes to foundations, tanks and roofing repairs, bituminous paint is a workhorse for anyone who needs a dependable waterproof barrier.
What bituminous paint does
Once cured, bituminous paint forms a continuous, water-resistant film that resists most salt solutions, dilute acids and alkalis, water and alcohol. It shields metal from moisture and oxidation and gives porous surfaces such as concrete and masonry a waterproof, weatherproof skin. It is not intended for use with oils, strong solvents, potable water tanks or, in most cases, interiors.
Common uses for bituminous paint
- Metal protection for corrugated iron, gutters, downpipes, tanks, fences, railings, gates, fire escapes, stairways and ladders
- Waterproofing concrete structures, screeds, stone, brick and sand or cement surfaces
- Overcoating felt and timber on roofing repairs
- Below-ground and foundation waterproofing
How to get the best from bituminous paint
Surfaces must be dry, stable and clean, free of dirt, dust, grease and loose material. Metal should be wire-brushed to remove rust. Porous surfaces such as concrete usually need a compatible primer first. Apply at least two coats by brush or spray, letting the first dry before the second. Where extra UV durability is needed, a solar-reflective topcoat can be applied once the bitumen has dried.
FAQs
What is bituminous paint used for? Waterproofing and corrosion protection on metal, concrete, brick, stone, wood and felt, both above and below ground.
How many coats of bituminous paint do I need? Two coats is the standard for reliable waterproofing, with the first coat fully dry before the second goes on.
Can bituminous paint be used below ground? Yes. It is widely used on foundations and buried surfaces to keep moisture out, provided the surface is properly prepared and primed.
Is bituminous paint waterproof straight away? It becomes waterproof once fully cured. Drying time depends on temperature and surface, but the film is designed for long-term weatherproof protection.
Internal links: link down to the Black Jack product page as a specific bituminous paint; link across to the Asphalt and surface repair hub for below-ground and hard-standing work. CTA: Not sure which bituminous coating fits your surface? Ask our team for a recommendation and pricing. DM us or request a quote.