WestWood Liquid Technologies

Wecryl 230

Manufacturer: WestWood Liquid Technologies 

Materials: Poly Methyl Methacrylates (PMMA) 

Wecryl R 230 comprises:

  • Wecryl R 230 — a two-component polymethyl methacrylate waterproofing resin available in pebble grey (RAL 7032). Other RAL colours are available on request
  • Wecryl R 230 Thix — a thixotropic version of the standard resin, for use in detailing at upstands, corners, connections and other details, available in pebble grey (RAL 7032) and charcoal grey (RAL 7043). Other RAL colours are available on request
  • Wecryl R 230 TT — a low-temperature installation version of the standard resin, with a modified cure system, to allow application between +25 and –15°C, available in pebble grey (RAL 7032). Other RAL colours are available on request
  • WestWood Fleece — a 1.10 kg·m–2 polyester fleece for use as a reinforcement
  • Wecryl 222 Primer — a non-pigmented primer based on a two-component fast-reactive polymethyl methacrylate resin, for the preparation of asphaltic and bituminous substrates
  • Wecryl 276 Primer — a non-pigmented primer based on a two-component fast-reactive and fast-curing polymethylmethacrylate resin, for the preparation of absorbent substrates such as concrete, screeds and timber

BBA logo

Number: 14/5117
Issue date: 11/05/2021

ETA logo

Number: 16/0812
Issue date: 16/12/2016

Approved for use on

Flat Roofs Green Roofs Pitched Roofs Roof Gardens Zero Falls Buried Roofs 

For use as a waterproofing system on flat and pitched roofs with limited access, including green roof and roof gardens

The system is also satisfactory for use on zero fall roofs with limited access on concrete substrates. The adhesion
to, and compatibility with, other substrates must be confirmed by test


Concrete Reinforced Bituminous Membranes Single Ply Membranes - PVC Timber 

on substrates of:
• concrete
• bitumen
• timber
• metal
• plastic

Surface Temperature Application

The substrate and ambient air temperature for the application of Wecryl R 230 standard formulation and Wecryl R 230 Thix is between –5 and +35°C, and for Wecryl R 230 TT between –15 and +25°C


25 Years 

Wecryl R 230 will achieve a service life in excess of 25 years.

Installation Requirements

The system should only be installed by installers who have been trained and approved by the Certificate holder.

Puncture Resistance

P1 - non accessible

Most Compressible Substrate (eg insulation)

P3 - accessible for maintenance of plant and equipment and to pedestrian traffic

Least compressible (eg concrete)

Fire Safety

In the opinion of the BBA, a system comprising a 12 mm thick gypsum glassrock roof board, primed with Wecryl 276 Primer and coated with Wecryl R 230 (grey) reinforced with WestWood Fleece, can be classified as BROOF(t4) in accordance with BS EN 13501-5 : 2005.

In the opinion of the BBA, a roof garden incorporating the system covered with a drainage layer of gravel 100 mm thick and a soil layer a minimum of 300 mm thick, will be designated as BROOF(t4).

In the opinion of the BBA, when the system is used in irrigated roof gardens its use will be unrestricted under the requirements of the national Building Regulations.

If allowed to dry, plants used in a roof garden may allow flame spread across the roof. This should be taken into consideration when selecting suitable plants.

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

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WestWood Liquid Technologies

Unit 12 Albany Park
Cabot Lane
Poole BH17 7BX
United Kingdom

T : 08008 085480

E : info@westwood-uk.com

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