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High Build all purpose high build mastic

A single component high build mastic product, used where a durable sealant is required for repair work or sealing around structural angles and penetrations on roofing structures, wood, metal or concrete surfaces.


High Build is an elastomeric modified asphalt emulsion type coating, containing no solvents and is applied using an airless spray system, roller or brush. High Build produces an excellent waterproofing membrane for smaller roof surfaces when applied by brush or squeegee.


Easy to use, High Build can be applied using, a brush, roller or squeegee.
The elastic nature of the product means that it will move with the building and not crack or pull loose from the surface it is adhered to, giving a permanent waterproof seal.

Once opened a can of High Build can be re-sealed, keeping the product fresh and ready for use up to 12 months.

environmentally friendly
liquid rubber
high build
trowel grade

High Build Uses

High Build is an excellent choice for sealing around vents and drains, where pipes pass through concrete.
The foundation walls require a sealant that both adheres to the different materials equally well but has sufficient flexibility and elasticity to resist cracking and tearing due structural movement.

High Build is UV-resistant, meaning it can be used inside and outside and will not be damaged by the sun.