Topseal DoubleTop System

Topseal DoubleTop System

Topseal Systems Ltd Third party certifications:
  • BBA Agrément Certificate

    BBA Agrément Certificate

    Certificate type

Extra reinforced protection (2 x 450 g/m² reinforcement mat) to provide a guaranteed waterproof barrier for permanent water containment in critical applications such as ponds and pools.

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For containing water for the lifetime of the guarantee. Topseal DoubleTop can deliver guaranteed performance under water for at least 25 years, enabling the creation of a versatile and stylish pond, pool, wet room or practically any environment where guaranteed protection is needed. Life expectancy 60+ years.


  • 18 mm OSB3 decking.
  • Topseal GRP roof, comprising: Topseal GRP laminate (2 X 450 g/m² reinforcement) and Topseal topcoat with choice of colours and finishes.

General information

Uniclass 2015

Pr_25_57_51_66 Polymeric membranesPrimary


J31/10 Warm deck roof coating

J31/110 Cold deck roof coating

J31/120 Warm deck roof coating

J31/5 Cold deck roof coating

Specification data - Polymeric membranes

Product Reference

Topseal DoubleTop System


Dark Admiralty Grey




BS 4800, colour

Consult manufacturer and insert requirements.

RAL, colour

Consult manufacturer and insert requirements.


As drawing

Contractors choice

Product Options


A wide range of GRP edge trims are available, consult manufacturer with requirements.


Third party certifications