More Views

High Build, Breathable, Crack Bridging External Wall Paint

Wallflex HB

Wallflex is a highly protective and decorative coating that has been developed using our latest technological advancements.
  • Water based – Environmentally friendly
  • Protects, insulates and weatherproofs in one coat
  • Allows the wall to breathe
  • Contains ceramic spheres – increasing the insulative properties of the wall.
  • Withstands harsh climates and wind driven rain

* Required Fields

Reset Options

You may be interested in our 'Bargain Basement' version of this product.

Quantity Calculator

Wallflex HB


You may also need

Price for all selected : £0.00
  1.    This itemWallflex HB



Wallflex HB is a high-build, environmentally friendly, decorative, single pack coating. Withstanding harsh climates, Wallflex HB will protect, insulate and weatherproof.

Is your building suffering from old / flaking paint, damp penetration, cracked render, crumbling pebbledash or brickwork? Brickwork and renders are mostly porous substrates and suffer from damp penetration followed by degradation caused from freeze-thaw cycles. Constant expansion and contraction takes its toll and renders and coatings begin to crack and crumble. Wallflex HB is a highly weather resistant coating that easily withstands wind-driven rain, ice and snow. It is also highly flexible, frost resistant and easily copes with normal expansion and contraction.

Suffering from mildew or mould? A lot of coatings on the market seal the wall and stop the rain, but do not allow the wall to breathe causing the wall to ‘sweat’. Wallflex HB is a totally weather resistant wall coating that remains water vapour permeable, allowing the wall to breathe without diminishing any of its protective qualities.

Are you aware that environmentally friendly products can last longer and are easier to use? As Polycote has produced long-term maintenance solutions, we have also striven to help the environment. Wallflex HB is one of our latest technological advancements – being a solvent-free, environmentally friendly wall coating. The ingredients used in this new formulation substantially reduce air emissions and vapour toxicity and are not only less damaging to the environment but are more user friendly too!

Would you like to eliminate your repainting needs for many years to come? Wallflex HB is a highly weather resistant, flexible coating with a life expectancy in excess of 20 years. Polycote, formed in 1991 now has buildings that are still coated, still look great and still give all the same protection we promised all those years ago.

Insulating qualities of Wallflex HB. Wallflex HB has been developed to contain ceramic spheres and pigments (more commonly found in the space industry), that reflects heat and significantly reduce heat loss in the winter and/or heat gain in the summer months. Wallflex HB also has anti-carbonation properties, protecting reinforced concrete structures from corrosion of the reinforcing steel.

  • 100’s of satisfied customers
  • Adheres to virtually any surface including: pebbledash, render, brick, block, concrete, Stucco, Tyrolean
  • Far longer lasting than conventional masonry paint!

Available in six different colours: Winter White, Magnolia, Cream, Champagne, Silver Grey and Suffolk Pink

You may be interested in our 'Bargain Basement' version of this product.


Number of parts:1
Application temperature:Above 5oC
Drying time @ 20oC:Touch dry: 45 minutes
Hard dry: 8 hours
Recoatable: 24 hours
Coverage:5L: 10 - 20m2
15L: 30 - 60m2
Number of coats:2

Please consult the technical data sheet for full product technical data.

View FileWallflex HB Safety Data Sheet    Size: (97.52 KB) View FileWallflex HB Technical Data Sheet    Size: (298.91 KB)


Thorough substrate preparation is essential.
The surface must be dry, sound, clean and free of loose or friable material, dust, chalk, oil and grease contamination. It is important that very damp or wet walls are not coated. Algae or fungi should be removed by power washing the surface and then coated with Polycote Destroy IT. Wallflex HB will bridge over hairline cracks, but larger cracks and other surface damage should be treated with suitable fillers or repair materials.

Priming is unnecessary unless the substrate is very porous, in which case a primer coat should be applied using Wallflex thinned 10-15% with water.
This should be left to dry overnight before the top coat is applied.

Wallflex HB is ideally suited to application by roller and brush, although it may be sprayed. The roller should be a heavy pile for rough surfaces and a medium to short pile for smooth surfaces.
Airless spraying should use a tip size of 18-23 thou and pressure of 150-200 bar. Mask off all areas not to be coated.
Apply 2 coats.


Product Questions

Can I achieve a smooth finish using wallflex? if not, can you suggest an alternative product
Question by: Jeremy Hale on 25 Aug 2015 16:16:00

Many thanks for your enquiry.

This wont change a smooth finish into a rough finish and wont smooth out a rough finish into a smooth finish.

It will simply repeat the undulations that you have on your existing surface although it will bridge hairline cracks and other minor defects.

I would also recommend that you use a short pile good quality lambswool roller to prevent leaving any texture marks on the surface.

Hope this helps.

Please feel free to call ourselves if you have any further questions or queries.

Answer by: Stuart White (Admin) on 26 Aug 2015 11:15:00
You must be logged in to answer questions.
What is the coverage of 15 liters on a previously painted roughcast wall?
Is there an off white colour option?
Question by: d.taylor on 28 Aug 2015 11:53:00
Depending on the previous coating and how porous the substrate may be, a 15l unit will generally cover in between 30-60 sq.m. There are 6 different finishes available, Magnolia would best suit an off white finish.
Give our Sale/Technical team a call on Free phone 0800 980 0852 and they will be more than willing to help.
Answer by: Guy Stanton (Admin) on 28 Aug 2015 12:05:00
You must be logged in to answer questions.

Customer Reviews

Good product great service
Review by Mrs Adrian Eatough

Good product great service

Soo pleased
Review by Alan Larkin

I thought I would just drop you a quick email to say how pleased I have been with your product Polycote Wallflex . My property in Wetherby west Yorkshire was finished in the Tyrolean finish and was in quite a bad state but your product covered well and application was quite easy and the finish was considerably better than expected

Add a Review

Other Products You May Need

  • Paint Brushes

    Paint Brushes

    From Only: £2.25
    For applying floor & roof coatings and solvents.
  • Professional Roller Kits

    Professional Roller Kits

    High quality easy to use and long lasting roller kits
  • Destroy IT Fungicidal Wash

    Destroy IT Fungicidal Wash

    Fungicidal wash solution – ideal to prevent regrowth of algae and similar weeds on roofs, walls, ceilings and masonry.
  • Easi-Fil


    From Only: £55.80
    Excellent for filling of fine cracks, holes and surface imperfections. Very strong, cures in only 20 minutes and can be sanded / painted straight away.

Product Tags

Use spaces to separate tags. Use single quotes (') for phrases.

Please wait...

Product Successfully Added to Your Cart