Axter Limited

Starcoat Roof Waterproofing Systems

Manufacturer: Axter Limited 

Materials: Polyurethane 

Starcoat Roof Waterproofing Systems are built up by applying the following components on site:
• Starcoat — a one-component, polyurethane, liquid-applied waterproofing membrane available in black, light grey (similar to RAL 7001), dark grey (similar to RAL 7011), dark red and tile red
• Starcoat QC — a one-component, polyurethane, liquid-applied ‘Quick Cure’ variant of Starcoat waterproofing membrane, available in black, light grey (similar to RAL 7001), dark grey (similar to RAL 7011), dark red and tile red, and with a typical curing time of 2.5 hours at 14°C >85% RH and 4 hours at 7°C >50% RH
• Starcoat PU Accelerant — a catalyst for mixing into Starcoat or Starcoat QC to reduce the curing time. The catalyst must not be used at temperatures above 20˚C
• Matcoat — a 80 g∙m–2 polyester reinforcement fabric for embedding into Starcoat or Starcoat QC over existing cracks, at upstands and other changes of plane in the unreinforced system
• Matcoat VV — a 150 g·m–2 glass-fibre reinforcement for embedment into Starcoat or Starcoat QC to achieve a fully reinforced system
• Primcoat Epoxy — a two-component primer for use on concrete surfaces where the moisture content of the concrete is greater than 4%
• Starcoat Thixo Additive — an additive mixed into Starcoat or Starcoat QC when used at upstands

BBA logo

Number: 13/5031
Issue date: 13/06/2018

Approved for use on

Flat Roofs Pitched Roofs 

For use as a fully adhered, exposed waterproofing layer on new and existing flat and pitched roofs with limited access and, when fully protected, on pedestrian access roofs.



The adhesion of the systems has been assessed as suitable on concrete, including damp concrete(1) , substrates. Acceptable adhesion of the systems to other substrates should be confirmed by test.

(1) Concrete with a humidity level ≥ 4% must be primed with Primcoat Epoxy


25 Years 

With adequate maintenance and repair, the systems will have an expected service life in excess of 25 years.

Installation Requirements

Installation of the systems must only be carried out by installers who have been trained and approved by the Certificate holder.

Fire Safety

When classified in accordance with BS EN 13501-5 : 2005, a flat roof system comprising an 18 mm WBP plywood substrate and two coats of Starcoat, each applied at a coverage rate of 1 kg∙m–2, was designated BROOF(t4).

The designation of other specifications should be confirmed by: England and Wales — test or assessment in accordance with Approved Document B (Volumes 1 and 2), Appendix A, clause A1. Scotland — test to conform to Mandatory Standard 2.8, clause 2.8.1. Northern Ireland — test or assessment by UKAS-accredited laboratory, or an independent consultant with appropriate experience.

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Axter Ltd

West Road
Ransomes Europark

T : 01473 724056

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