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Topseal DoubleTop System

Third party certifications:
  • BBA Agrément Certificate

    Certificate type

Topseal Systems Ltd

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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+44 (0)1423 886495 www.topseal.co.uk

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
Specification data - Polymeric membranes
Product Reference

Topseal DoubleTop System


Standard: Dark Admiralty Grey. There is a further choice of 20 standard and 98 BS 4800 colours, insert requirements.


As drawing

Contractors choice

Product Options


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

Third party certifications
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