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Protecting buildings from water penetration with waterproofing solutions

Whether you’re looking to stop a leak, repair an existing roof, or fit a new roof, Bostik has a solution to support the step-by-step process of your next waterproofing project.

Key products in the Bostik waterproofing range include:

  • Flexacryl - a flexible, single coat compound for immediate waterproofing over most conventional roofing substrates
  • Flashband – a self-adhesive flashing tape which bonds instantly to provide a permanent watertight seal

In addition to products that are designed to protect buildings from water penetration, the range also features a Bituminous Black Paint for general weatherproofing of metalwork and roofs, as well as an Aluminium Solar Protector with light and heat reflecting properties.

Discover our products and materials

bostik-uk-flexacryl-instant-repair-waterproofing-coating-main-64
bostik-uk-flexacryl-instant-repair-waterproofing-coating-main-64

FLEXACRYL QUICK DRYING WATERPROOFING COATING

  • Product
Fast-drying, solvent-free roof coating
Bostik Penetration Primer for Roofs 1L Black - 30811883.jpg
Bostik Penetration Primer for Roofs 1L Black - 30811883.jpg

PENETRATION PRIMER FOR ROOFS

  • Product
General purpose, highly penetrative primer
Bostik Bituminous Mastic All Weather Trowel 5L 30618101.jpg
Bostik Bituminous Mastic All Weather Trowel 5L 30618101.jpg

BITUMINOUS MASTIC FOR ROOFS

  • Product
Multi-purpose trowel grade bituminous material
Bostik Solvent Free Waterproofer for Roofs 5L Black - 30811685.jpg
Bostik Solvent Free Waterproofer for Roofs 5L Black - 30811685.jpg

SOLVENT-FREE WATERPROOFER FOR ROOFS

  • Product
Flexible emulsion for use on all common roof surfaces
Bostik All Weather Brush Bituminous Waterproofer 5L 30811918.jpg
Bostik All Weather Brush Bituminous Waterproofer 5L 30811918.jpg

BITUMINOUS WATERPROOFER FOR ROOFS

  • Product
Premium-grade, solvent-based waterproofer for use on all common roofing materials
Bostik Rufabrush Brushable Waterproofer 2.5L 30811925.jpg
Bostik Rufabrush Brushable Waterproofer 2.5L 30811925.jpg

BRUSHABLE WATERPROOFER FOR ROOFS

  • Product
General purpose, solvent-based waterproof compound for use on all common roofing surfaces
Bostik Aluminium Solar Protector for Roofs 5kg Silver - 30812224.jpg
Bostik Aluminium Solar Protector for Roofs 5kg Silver - 30812224.jpg

ALUMINIUM SOLAR PROTECTOR FOR ROOFS

  • Product
Aluminium protective coating with light and heat reflective properties
Bostik Bituminous Black Paint 1L Black - 30812217.jpg
Bostik Bituminous Black Paint 1L Black - 30812217.jpg

BITUMINOUS BLACK PAINT

  • Product
Protective coating for external waterproofing and weather protection
Bostik Flashband Primer SV 500ml Black - 30812257.jpg
Bostik Flashband Primer SV 500ml Black - 30812257.jpg

FLASHBAND PRIMER SV

  • Product
Solution designed to prepare porous or dusty surfaces before application of Bostik Flashband
Bostik Damp-Proofer & Waterproofer 2.5L Black - 30812206.jpg
Bostik Damp-Proofer & Waterproofer 2.5L Black - 30812206.jpg

AQUAPRUFE DAMP-PROOFER AND WATERPROOFER

  • Product
Emulsion for use both internally and externally on floors and walls
bostik-uk-tanking-slurry-20kg-main-640x480px
bostik-uk-tanking-slurry-20kg-main-640x480px

Tanking Slurry

  • Product
A breathable, waterproof coating for sound internal brickwork, concrete and stone
bostik-uk-flexacryl-instant-repair-waterproofing-compound-main-6
bostik-uk-flexacryl-instant-repair-waterproofing-compound-main-6

FLEXACRYL INSTANT REPAIR WATERPROOFING COMPOUND

  • Product
Flexible, single-coat waterproofing compound for flat roofs
bostik-uk-image-product-flashband-1.jpg
bostik-uk-image-product-flashband-1.jpg

FLASHBAND

  • Product

Bostik Flashband Self Adhesive Flashing Tape for Roofs is a flexible bitumen strip that bonds instantly to most building materials ...

Frequently Asked Questions

Selecting the right roof sealant depends on your specific waterproofing needs. For small cracks and emergency repairs, a flexible coating that can be applied in various weather conditions works best. These products create a watertight seal while remaining elastic enough to handle roof movement and temperature changes.

When dealing with larger areas, look for coatings offering UV protection and long-term durability. Our range of roof sealant products provides solutions for different roofing materials and project sizes, to support both planned maintenance and urgent repairs.

The key is choosing a coating that matches your roof type and application requirements. Consider factors like drying time, weather resistance, and ease of application to ensure the best waterproofing results.

Modern roof coatings offer exceptional protection when properly matched to your roofing material. Acrylic-based formulations provide excellent UV resistance and durability for most surfaces, while creating a flexible membrane that moves with your roof's natural expansion and contraction.

Our range includes quick-drying solutions that can be applied in various weather conditions. Many of our products only require a single application to achieve full protection, saving both time and labour costs while ensuring your roof stays protected for years to come.

Proper preparation forms the foundation of successful roof waterproofing. Start by thoroughly cleaning the surface and removing any loose materials. Check for existing damage and repair any cracks or gaps before applying your chosen waterproofing system.

For optimal results, apply a suitable primer to enhance adhesion and create a strong bond between the roof surface and waterproofing material. This step proves particularly important on porous surfaces where the Bostik Penetration Primer helps ensure maximum effectiveness.

When applying the main waterproofing layer, work in manageable sections and maintain consistent coverage. Our WATERSTOP Flexible Waterproof Coating provides excellent adhesion and flexibility, making it suitable for various roof types and weather conditions.

*Bostik Penetration Primer is not suitable for use with the Bostik WATERSTOP product range.

Roof coatings provide an effective solution for preventing and stopping minor leaks when properly applied. The coating creates a seamless, waterproof barrier that seals existing small gaps while protecting against future water penetration.

For the best performance, examine your roof carefully before application. While roof coatings work well for small leaks and preventive maintenance, larger structural issues need repair first. The coating's success depends on proper surface preparation and application techniques.

Regular maintenance checks help ensure the coating continues performing as intended.

Modern roof coatings incorporate advanced waterproofing technologies designed to create robust moisture barriers. The waterproof performance varies based on the coating formulation, with premium options offering superior protection against water infiltration under diverse conditions.

Quality coatings form seamless membranes that bond directly to the roof surface, preventing water from finding entry points. This protective layer works in two ways - repelling surface water while allowing the roof structure to breathe, which helps prevent moisture buildup underneath.

Our range features specially engineered waterproof formulations that maintain their protective properties over time. When selecting a coating, consider factors like the roof material, local climate, and intended level of protection to ensure optimal waterproofing performance for your specific needs.

Discover the Bostik Academy

Bostik Academy is a knowledge centre created for professionals in the construction market.

Sign up for our tailored training, completely aligned to your needs.

Our highly skilled Technical Team will present our product portfolio, best application methods, and key industry recommendations.

VISIT THE BOSTIK ACADEMY!

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