Non-drying oil-based mastic providing a durable, waterproof seal for gutters, ducting, down pipes, roof bolts, air duct joints and seams

    Key Features

    • 100% waterproof
    • Solvent-free
    • Non-shrinking
    • Polymer reinforced, increases performance life
    • Paintable once a skin has formed

    Non-drying sealant

    It forms a protective self-healing skin on the surface keeping the body of the mastic permanently flexible in order to accommodate any structural or thermal movement on the surface. If the skin is cut, the oils beneath will flow and reseal the damage. It remains flexible over a wide range of temperatures, and has excellent adhesion to most materials used in construction and can be overpainted to achieve the desired colour.

    Other information:

    Do not use for floor joints or on bituminous surfaces. Not recommended for high movement joints. Not suitable for continuous immersion in water. Not suitable as an adhesive to bond two surfaces together. Do not use where sealant strength is needed e.g. to hold guttering in position. Application onto porous surface may reduce longevity of the product due to absorption of the oils into the surface.


    • 280ml cartridge (white)
    • 410ml cellopak (white)

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