Wethertex HBS Flex-Coat Hi-Build Coating
  • Wethertex HBS Flex-Coat Hi-Build Coating

Wethertex HBS Flex-Coat Hi-Build Coating

Wethertex HBS Flex-Coat Hi-Build Coating is a high quality, heavily textured, flexible masonry paint developed using advanced Optilife silicone technology.


  • Advanced 20 year durability
  • Tough and weatherproof finish
  • Highly flexible and anti-crack
  • Textured finish
  • Highly breathable
  • One coat application
  • Current colour: Brilliant White
Choose a colour
Close colour picker
  • Brilliant White
  • RAL1015 - Antique Cream
  • RAL7047 - Pebble Grey
  • RAL9001 - Ivory Tusk
VAT excluded

£59.53 Tax incl.


Wethertex HBS Flex-Coat Hi-Build Coating is a high quality, heavily textured, flexible masonry paint. Developed using advanced Optilife silicone technology, Wethertex HBS Flex-Coat Hi-Build Coating offers outstanding breathability, is highly waterproof and will protect your building for up to 20 years. Due to its extreme flexibility, this one coat masonry paint is the perfect solution for the renovation of areas that are uneven, badly weathered or that have developed small cracks.


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 apply to a substrate that has been primed with Wethertex ST1 Quick Dry Stabilising Primer. Scaffolding must be independently tied to allow for uninterrupted application.


Stir the product thoroughly and do not contaminate. For application by hawk and trowel apply to 1-2mm thick and texture using Wethertex Textured Rollers, or other texturing rollers or tools. 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 (max) 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. 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 procts 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.

It is your responsibility to read the Product Data Sheets (available below) before you place an order and prior to application of the product. The content of this website is our best recommendation and is not advice. Coverage rates quoted are approximate, you agree that coverage depends on the condition of the substrate, surface absorption, texture and application method. We ALWAYS recommend a trial area is coated to ensure the product meets your requirements before use.

Product Details

Data sheet

Roller, Spray

Customer agrees that before placing an Order, Customer has read and understood the most up to date Product Data Sheet for the Product. Where we have access to the Product Data Sheet from the manufacturer, we will either provide a copy on request, or include a link to the Product Data Sheet available on the manufacturer’s website. Customer further agrees that we have no liability for any errors or omissions contained within the Product Data Sheets. For more information, please see our Terms & Conditions of Sale.

questions John Riggs on 22/04/2019

Would OSB3 Board need any preparation before applying this product? Other than taping over joints and filling the fixing holes. It's to be used on the South-west (prevailing wind)side of a park home.


On OSB we recommend priming first with Wethertex ST1 Quick Dry Stabilising Primer and then using a plasterers scrim on the joints before applying the Wethertex HBS Flex-Coat Hi-Build Coating.

questions Mark  on 22/03/2019

Can you this product to paint over the outside walls (house)if they have been painted previously with waterproof paint . Thanks.


Wethertex HBS Flex-Coat Hi-Build Coating can be used over existing coatings however it does depend on which type has been applied. As we do not know this we would recommend a test area is applied to ascertain suitability and would advise the use of Wethertex ST1 Quick Dry Stabilising Primer also.

questions Tim on 13/03/2019

Hi. Would this coating bridge butt joints in OSB3 clad walls without a bridging material? If no, what bridging material is available?


On OSB we recommend priming first with Wethertex ST1 Quick Dry Stabilising Primer and then using a plasterers scrim on the joints before applying the Wethertex HBS Flex-Coat Hi-Build Coating.

questions Nicholas on 22/01/2019

Hi Is this paint, suitable for a garden wall surrounding our patio, which I’d made from blocks?


Wethertex HBS Flex-Coat Hi-Build Coating can be applied to blockwork, in this particular application the important factor would be to ensure no water/moisture is allowed to penetrate through the wall from behind the coating to cause issues.

questions Lynne on 13/11/2018

I have been advised to use something called terrain paint to fix a problem with an area on my park home. Is this product similar?


We're not familiar with 'Terrain Paint' but Wethertex HBS Flex-Coat Hi-Build Coating is used extensively on park homes. 

questions Ross faulkner on 13/10/2018

Can it be painted straight on to cement boards


For optimum performance apply Wethertex ST1 Quick Dry Stabilising Primer to the substrate first.

questions Chris on 13/10/2018

Hello,can this product be used on exterior ply board? It is for a chalet type home of timber construction.


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

questions James  on 27/09/2018

Can you get different colours or can you paint over it.


Wethertex HBS Flex-Coat Hi-Build Coating is only available in the colours listed but can be overcoated with Wethertex AP77 Flexible Smooth Masonry Paint if desired.

questions Andrew on 17/09/2018

Hi there can you paint metal with this paint?


No, but we offer a range of finishes from Cromadex that offer a textured finish for metal surfaces, see HERE

questions Brian Gant  on 30/06/2018

How much coverage per tub on new. Smooth sand and cement rendering?


The coverage rate is 2-3kg per m² which means a 15kg tub will cover 5 - 7.5m².

questions Wayne T on 03/10/2017
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?

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


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