Tremco Heavy Grade Hydroseal


Product Description

Tremco Heavy Grade Hydroseal

Tremco Heavy Grade Hydroseal is a thick, inert fibre reinforced solvent cut bituminous mastic. It is easy to use and adheres to all dry, clean surfaces. Tremco Heavy Grade Hydroseal is alkali and acid resistant, and when dry it will not contaminate drinking water. Specially designed to be trowel applied to any surface. It forms a tough skin quickly then dries slowly beneath the surface. Heavy Grade Hydroseal is specially formulated for waterproofing and sealing cracks, laps or joints and fixings on new or old structures of metal, concrete and timber.

It is Ideally suited for Roof sheetings, Flashings and Cappings, Box and valley gutters, Downpipes, Under screws, Washers, Water Tanks, Troughs and Sealing fixed windows.

Please call our friendly staff on 1300 PLUGIT for more information.

Domestic, Industrial and Commercial Buildings:

  • Roof sheetings.
  • Flashings and Cappings.
  • Box and valley gutters.
  • Downpipes.
  • Under screws.
  • Washers.


Rural Applications:

  • Sheds and other buildings.
  • Water tanks.
  • Troughs.


Marine Work:

  • Sealing against water, Drafts and Fumes.
  • Bedding in deck timber.
  • Sealing fixed windows


  • Low Cost
  • Will not slump at temperatures up to 70oC
  • Will not contaminate drinking water

Click on Below Links for Technical Data Sheets and/or MSDS Sheets

TWS – TDS  Heavy Grade Hydroseal

TWS – MSDS  Heavy Grade Hydroseal