Cork Spray Render Specialists
Sustainable Spray Cork Render for Every Building
CorkSeal delivers natural, high-performance cork coatings that insulate, waterproof and protect, transforming internal and external walls with a finish that is built to last and kind to the planet.
Get a QuoteWhat Is Spray Cork?
A Natural, High-Performance Coating
Spray cork render is a natural coating made from granulated cork mixed with water-based resins. Applied to both internal and external surfaces, it provides insulation, protection and a beautiful, seamless finish.
Because cork is harvested from the bark of the cork oak tree without ever cutting it down, it is one of the most sustainable and eco-friendly building materials available today.
Learn More About Spray Cork →Why Choose Cork
The Benefits of Spray Cork Render
One coating, countless advantages, from year-round comfort to lasting protection and genuine eco-credentials.
Thermal Insulation
Millions of microscopic air pockets reduce heat loss in winter and heat gain in summer, improving energy efficiency and cutting fuel bills.
Able to achieve a U value of down to 0.066 W/mK, a single coating helps keep interiors comfortable year round, reducing reliance on heating and air conditioning.
Waterproof & Breathable
A waterproof barrier keeps rain and moisture out while still letting walls breathe, preventing condensation, damp and mould.
This vapour-permeable finish allows trapped moisture to escape rather than becoming locked inside the structure, protecting the wall and the health of your building for decades.
Crack Resistant
Naturally flexible, spray cork expands and contracts with the building, preventing the cracking common to cement renders.
With up to 38% elongation before breaking, the coating absorbs the natural movement and settling of a structure, keeping walls looking flawless long after rigid renders would have failed.
Fire Resistant
Cork is naturally fire-retardant with a Euro-class B rating, and never releases toxic fumes when exposed to high temperatures.
Unlike many synthetic coatings, cork does not melt, drip or spread flame, giving you added peace of mind and helping your property meet modern fire-safety expectations.
Acoustic Insulation
The cellular structure of cork absorbs sound waves, cutting noise transmission by up to 38dB for a more peaceful space.
Ideal for roadside homes, studios and busy offices, it dampens both airborne and impact noise, creating calmer, quieter interiors without bulky acoustic panels.
Weatherproof
Almost impervious to salt and resistant to UV, frost and extreme weather, making it the ideal choice for coastal and exposed environments where traditional renders quickly break down.
Salt spray and sea air won't corrode or degrade the finish, the colour won't fade and the coating stands up to driving rain and temperature swings, backed by a warranty of up to 25 years.
Where It Works
Applications for Every Project
From full building façades and external wall insulation systems to soundproofing studios and anti-condensation coatings, spray cork adheres to almost any surface, brick, concrete, plaster, metal and wood.
It is the ideal solution for new builds, renovations, heritage restoration, eco-builds and specialist projects such as container conversions and motorhome insulation.
Explore ApplicationsProven Performance
The Numbers Behind the Coating
25
Year Warranty
28
Standard Colours
38dB
Noise Absorption
B
Fire Rating
Kind To The Planet
Sustainable & Carbon Negative
Cork oak forests absorb large amounts of CO₂, and harvesting the bark stimulates the tree to absorb even more as it regenerates, every 9 to 12 years, for over 200 years, without a single tree being felled.
The result is a coating that stores more carbon than is emitted during production. Water-based, biodegradable and free from solvents, microplastics and toxic additives, spray cork is a genuinely responsible choice.
Read Our Eco-Credentials →The Transformation
Before & After
See how spray cork render revitalises tired, weathered walls, delivering a seamless, protective finish that looks as good as it performs.
Areas We Cover
Essex & Kent
Proudly serving homes and businesses across Essex and Kent.
Start Your Project
Ready to Transform Your Walls?
Get in touch with the CorkSeal team for a free, no-obligation quote and discover how spray cork render can protect and insulate your property.
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