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Hydroseal Bituminous Paint Waterproofing Membrane 20 L

Code: 40-WM20
U.O.M. - Each
Waterproofing membrane (Hydroseal) 20L. A brushable bitumen based sealant that is easy to apply. This bituminous waterproofing sealant that will not contaminate drinking water.


Brushable Hydroseal is a heavy bituminous, fibre reinforced, rust inhibiting sealing compound, specially designed to be brushed thickly to any surface. When dry, Brushable Hydroseal is tough and waterproof with good weathering qualities, does not contaminate drinking water and is not highly inflammable. It forms a tough skin quickly.


  • Easy to apply
  • Will not contaminate drinking water
  • Forms a tough skin quickly
  • No primer required
  • Ideal for:

  • Repairing and waterproofing the inside of iron and concrete tanks and troughs
  • Re-surfacing old Malthoid, iron and cement reinforced roofs and gutters
  • Stopping leaks in roofs and gutters; sealing leaks in tanks, troughs, flashings and cappings, under screws and washers and downpipes (internal)
  • A relatively slow drying sound deadener and anti-drumming compound for all sheetmetal work
  • Damp-proofing of concrete and masonry walls, above and below grade, where no hydrostatic pressure exists

    Surface Preparation:

    Apply to clean, dry surfaces, free from dirt, wax, grease, oily residue and all loose paint, rust and other material. No primer required. Can be applied to damp metalic surfaces


    Stir before use but do not thin - use direct from container.


    Apply by stiff brush as thickly as possible (approx. 0.7mm wet film thickness). For large holes use a glass mesh or strong cloth to reinforce. First spread a liberal coating of Brushable Hydroseal around the hole or crack, cut mesh or cloth to fit across the hole and to overlap at least 150mm. Spread one side with Brushable Hydroseal and embed this side in the Brushable Hydroseal around the hole. Then apply a further coating of Brushable Hydroseal to cover the mesh entirely. To provide UV protection on exterior applications, after 14 days drying, Brushable Hydroseal can be painted with a water based paint - refer to data sheets prior to applying products.

    Clean Up:

    Thoroughly clean brushes and equipment with mineral turps and rinse under water. Hands can be cleaned using appropriate hand cleanser.


    Store in sealed containers under cover at normal temperatures for 12 months. Containers must be kept sealed at all times when the material is not being used.


    Covers approx. 1.5m2 per litre

    Additional Information

    CODE 40-WM20
    10/4 - 4/10 Delivery Yes
    Colour Black
    U.O.M Each
    Size 20 L
    Appearance / Composition Liquid
    Cure Time Allow 72 hours (min) before refilling water tanks
    Yield Covers approx 1.5m2 per litre
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