Wethertex HBS Flex-Coat Hi-Build Coating

Wethertex HBS Flex-Coat Hi-Build Coating View larger
Typical Coverage (per coat)2 - 3kg per m²
ApplicationRoller, Spray
The figures stated above are approximate. Please ensure you refer to all datasheets for full application information.

Wethertex HBS Flex-Coat Hi-Build Coating is a high quality, ready to use, highly vapour permeable and flexible, high build silicone wall coating. For use on most exterior masonry surfaces and exterior grade building boards. Ideal for renovation of uneven and irregular surfaces. A variety of textured finishes can be achieved using various application techniques. 

Read Full Description

More details

£56.70 + VAT

Wethertex HBS Flex-Coat Hi-Build Coating is a quality ready mixed highly vapour permeable and flexible silicone coating. For use on most exterior masonry surfaces and exterior grade building boards. Ideal for renovation of uneven and irregular surfaces. A variety of textured finishes can be achieved using various application techniques.

Features & Benefits

  • Suitable for existing well adhered paint coatings, render, plaster and building boards 
  • Silicone technology
  • Trowel, roller or spray application
  • Breathable
  • Highly water resistant
  • Anti-crack
  • Highly flexible


Make good cracks and structural defects. All surfaces must be clean, dry and free from algae, lichen & other growths. Any faults in the substrate/structure, particularly those that can lead to moisture penetration, must be rectified or can affect the finish quality. Any existing crazed or flaking paint, dirt, grease or other surface contaminants should be removed. For optimum performance it is recommend to apply to substrates that have been primed with Wethertex ST1 Quick Dry Stabilising Primer. Scaffolding must be independently tied to allow for uninterrupted application.


Hawk/Trowel & Roller

Stir the product thoroughly to ensure it is fully homogenous, do not contaminate. Apply by hawk and trowel 1-2 mm thick and texture using a High Build application roller, or other texturing rollers or tools.


Stir the product thoroughly to ensure it is fully homogenous, do not contaminate. For spray application, prime all areas to be decorated. For best results in terms of finish, coverage, speed of application and low over spray the following set up is recommended. Use a GC 200/24 2HP compressor or larger that can continuously deliver a maximum of 80psi at 4-5 cubic feet per minute on a 3 metre (maximum) length air-line to the spray gun. A GC 330 hopper feed spray gun with a 3mm air cap and tip size of 3-4mm. Apply at 40psi air flow/spraying pressure with an 18” (450mm) distance from gun tip to the surface being coated (target). Cover areas not to be sprayed with masking tape and wet strength masking paper or film. Spray using a ‘cross hatch’ method, i.e. horizontally & vertically to achieve a full, uniform and even texture overall. Clean the tip and air cap frequently during use to prevent blocking.

Apply all products in accordance with BS 6150: 2006 Code of Practice for painting of buildings and BS 8000: Part 12: 1989 Code of Practice for decorative wall coverings and painting. 

Send us your question


Hi I want to paint new ply outside with Wethertex HSB flex coat high build Would I need to prime the ply 1st if so what’s the primer to use?

Wayne T from Ringwood (England ) - 03/10/17


No primer is required, Wethertex HBS Flex-Coat Hi-Build Coating can be applied directly to plywood.

Question about the product

I have read and agree to the Conditions of Use (read) Send

The question has been correctly sent

Free delivery on orders over £75 (terms & conditions)

• Deliveries will be made within 3 working days (standard delivery)
• You must be UK mainland based for the free delivery offer.
• Postcodes listed are excluded from the free delivery and priced below.

Please note: deliveries will need to be signed for at the point of delivery.

UK Mainland OnlyUp to £75.00£75.01 +
Standard (2/3 working days)£8.00FREE
Next Day£15.00£15.00
Next day before 09:00am£30.00£30.00
Next day before 10:30am£25.00£25.00
Next day before 12:00pm£20.00£20.00
Saturday Delivery£35.00£35.00

£25 (Standard 2-3 Day Delivery Only)

AB30, AB31, AB32, AB33, AB34, AB35, AB36, AB37, AB38, AB44, AB45, AB46, AB47, AB48, AB49, AB50, AB51, AB52, AB53, AB54, AB55, AB56, FK, G83, IV, KW1, KW2, KW3, KW4, KW5, KW6, KW7, KW8, KW9, KW10, KW11, KW12, KW13, KW14, PA, PH, HS, KA27, KA28, ZE

£35 (Standard 2-3 Day Delivery Only)


£50 (Standard 2-3 Day Delivery Only)


Please note that all carriage prices are quoted without V.A.T. at the current rate.

Scottish Islands - outside standard distribution area, please contact us for a quote.

There may be an exception for heavy goods when purchased in quantity where we will contact you to advise any additional charges.

Next Day delivery and Saturday Service is available on stocked items for orders received before 11:00am only.

Because of the nature of our products, we use specially selected carriers to ensure safe and prompt delivery to you.

Please note: Any time or date named by Rawlins Paints Limited for delivery is given and intended as an estimate only and Rawlins Paints Limited shall not be liable to make good any damage or loss whether arising directly or indirectly out of a delay in delivery. Deliveries are made using a reliable nationwide carrier. Although over 99% of consignments arrive on time, we recommend that no labour is employed to undertake work until materials have arrived on site.

Wethertex HBS Flex-Coat TDS


Wethertex HBS Flex-Coat MSDS

Whilst every effort is made to ensure our data sheets are up to date, we advise you check the latest revision directly with the manufacturer to ensure you have the most current version.
E J Rawlins & Co. Ltd trading as Rawlins Paints make available product data sheets and information in good faith but without warranty. We do not accept liability for any errors or omissions contained within the data sheets or any outdated versions.