Topseal Systems can only be installed by Trained and Approved Topseal Installers nationwide. Technical inspections are carried out to ensure that our high standards are being maintained.

Contact details of local installers who are located in the region of your project are available on request.

18mm OSB3 T & G decking
450g/m2 Topseal Reinforcement Mat
450g/m2 Topseal Reinforcement Mat
Topseal Roofing Resin
Topseal Roofing Resin
Topseal Roofing Resin
Topseal Topcoat
Topseal GRP Edge Trim

The Topseal Double Top system comprises of a waterproofing laminate consisting of 2 x 450g/m2 Topseal Roofing Grade Reinforcement Mat saturated with Topseal Roofing Resin.

When the laminate has cured (normally within 1 hour) it is over-coated with Topseal Topcoat.


Upstands / Edge Trims / Corners Details
For ease of detailing, a range of preformed Topseal edge trims are available in a variety of shapes and sizes to suit most changes in direction and termination points. These are installed in accordance with our recommendations. Once fitted they are overlapped by the main laminate to provide a completely seamless system.


Every Topseal Double Top installation is backed by our class leading 25 year materials guarantee for water containment and 40 year for roofing and is supported by the installer’s guarantee on workmanship for the same period.
Each installation can also be covered by Topseal’s optional guarantee protection certificate and Insurance backed guarantee.

Key Features

  • Cold applied – no heat or naked flames
  • Quick curing – fast application rate
  • Completely seamless – no joints or seams
  • Fully reinforced – flexible
  • Suitable for flat (zero falls) / pitched roofs
  • Suitable for balconies/walkways – will withstand heavy foot traffic.
  • Guarantee for 25 years for water containment and 40 years for roofing installations
  • UV and chemical resistant
  • Full range of BS4800/RAL colours available – including Simulated Lead and Copper finish.
  • BBA independent certification EXT.F.AA Fire Rated to BS476: Part 3
  • Environmentally Friendly
  • ISO:9001 and ISO:14001 registered
  • Isocyanate and Halogen free
  • Available with anti-slip finish
  • No toxic rainwater run-off



Every Topseal installer is allocated a unique verification number to prevent 3rd party misrepresentation. You should always ask any Topseal installer for their verification number.

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