10 Best Flat Roof Waterproofing Paint in The UK

✅Designed for both flat and pitched roofs, this high-performance coating adheres to a wide range of surfaces, including asphalt, brick, concrete, GRP, metal, felt, OSB, and more.
✅No primer needed, no second coat required—just a single, easy application with a brush or roller. Siramico Coatings Liquid Rubber Coating is perfect for hassle-free DIY use, delivering a professional finish with minimal effort.
✅Forming a seamless, elastic membrane, this liquid rubber coating expands and contracts with your surface, providing strong adhesion and waterproofing that lasts up to 10 years.
✅Quick drying and ease to use straight out of the can liquid rubber solution for all your waterproofing requirements.

9.3

Superb

9.2

Superb

Polar Specialist Coatings

Polar Bitumenseal Grey Paint - 5KG - Instant Waterproof Bitumen Roof Sealant - Ideal for Leaks, Cracks & Pitched Roof Repair - Concrete, Brick, Asphalt, Drainpipes & Gutters - Easy to Apply

Free Shipping

Why We Love It

Instant and durable waterproof seal.
Easy, one-coat application process.
Long-lasting, protective finish.

Main Highlights

Instant Waterproof Seal: The ideal solvent-free solution for immediate and complete sealing of emergency leaks or cracks. Apply directly to the affected area to quickly seal and protect. This bitumen roof sealant forms a robust, waterproof membrane to keep damp and water out, ensuring reliable long-term results
One Coat Application: Efficiently seal cracks or leaks with just one coat, saving you time and effort. A 5kg container covers up to 5m², delivering optimal waterproof protection with a single application. This bitumen paint solution is suitable for various uses, ensuring excellent results. Perfect for both residential and commercial applications
Multi-Surface Compatibility: Specially formulated with reinforced fibres that interlace to provide reliable protection. The water-resistant solution offers a resilient finish that works on drain pipes, gutters, GRP, flat and pitched roofs, bitumen, metal, fibreglass, and concrete
Easy to Apply: No primer is needed before applying Polar Bitumenseal waterproofing paint. Apply immediately and directly for instant protection. Clear the affected area of moss and debris, and remove any surface water, oil, or grease. Use a brush or roller depending on the size of the area. Touch dry within 3 hours. Allow 24 hours to fully dry. Note: Should not be applied in poor drying conditions or when rain is imminent
Attractive Finish: Polar Bitumenseal is a water-based solution that provides long-lasting protection. Available in grey, white, and black finishes and is available in a convenient 5kg size to suit any job. Dries to form a durable and water-resistant finish, ensuring a professional and clean appearance every time

TekCryl 10 KG - Grey, 5 year guarantee! (YES NOBODY ELSE OFFERS A 5YR WARRANTY), Roof Sealer, Emergency Roof Repair, Fast Fix

Roofix 20/10 Multi-Surface | Roof & Gutter Repair | Instant Waterproofing Solution for Flat Roofs and guttering | Black, Grey or White (Black) | 5 litres

Why We Love It

Superb flexibility and longevity.
Easily applicable on roofs.
Generous coverage ratio.

Main Highlights

Easy to apply
Excellent flexibility and durability
Can be applied to virtually any roofing material (not rubber)
Can last in excess of 10 year
Coverage is approximately 1 litre per m², nb corrugated & porous surfaces have a lower coverage

Flat Roof Waterproofing Compound 5L with Application Brush – Quality Flat Roof Sealant Paint - House and Shed Roofing Repair and WaterProof Coating DIY - for Bitumen, Asphalt, Felt, Concrete, Metal

Why We Love It

Ideal for roof repairs.
Versatile waterproofing protection.
Easy DIY application.

Main Highlights

IDEAL FOR ROOF REPAIRS: Set off Flat roof sealant paint with an application brush included. It’s a reliable choice for maintaining older roofs or preventing leaks, resealing, waterproofing, and repairing existing roofs for houses and sheds. The compound keeps roofs watertight almost immediately after application.
VERSATILE WATERPROOFING: Effectively seals and protects a variety of surfaces, roof repair paint for asphalt roofs, felt roofs, concrete decks, asbestos-cement sheeting, metal sheeting, slates, and tiles.
EASY APPLICATION: Roof sealant paint spreads smoothly with the included brush. For best results, ensure the surface is clean and dry before applying two coats of this compound. Ideal for DIYers - just mix well and start sealing.
DURABLE FIBRE-REINFORCED PROTECTION: Contains organic fibres, waterproof paint sealant provides strength and stability, creating a long-lasting barrier against water, even in harsh weather conditions.
GREAT VALUE FOR MONEY: A cost-effective shed roof paint waterproof solution delivering high-quality waterproofing, saving you from expensive roof repairs. Ideal for flat roofs, sheds ect.

Polar Specialist Coatings

Polar Leak Seal Clear Paint - 2.5 Litre - Instant Waterproof Roof Sealant - Ideal for Leaks, Cracks & Roof Repair - Concrete, Brick, Metal, Drainpipes & Gutters - Easy to Apply

Free Shipping

Why We Love It

Durable and resilient protection.
Instant and effective repair.
Versatile across multiple applications.

Main Highlights

Waterproof Seal: The ideal solution for instant waterproof sealant on leaks or cracks. Apply roof sealant paint to the affected area to seal. The paint forms a waterproof membrane to keep water out. Easy to apply with a brush or roller, ensuring complete coverage. Durable and resilient, it safeguards against damage from severe weather
One Coat Repair: Don’t waste any time sealing cracks or leaks. Polar LeakFix works in one coat, This flat roof sealant paint provides instant repair on flat or pitched roofs. With 500ml covering up to 0.5㎡, its quick-drying formula ensures minimal downtime. Ideal for both residential and commercial use, offering a reliable solution for all your waterproofing needs
Instant Protection: Formulated with reinforced fibres for tough, hard-wearing, and instant protection. This black sealant is perfect for emergency repairs or maintenance on drain pipes, gutters, and roofs. It gives long-lasting protection to cracked surfaces and performs reliably in all weather conditions, ensuring peace of mind
Easy To Apply: No primer needed before applying Polar Leakfix. Apply waterproofing sealant immediately for instant waterproof protection. Clear the affected area of moss, debris, and surface water, oil, or grease thoroughly. The sealant becomes touch dry within 3-4 hours. Designed for DIY enthusiasts and professionals, achieving thorough sealing
Multi-Purpose Use: Ideal water sealant for felt shed roofs, asphalt, bitumen surfaces, gutters, drainpipes, concrete, brick, GRP, fiberglass, and metal roofing. Available in Clear, Grey, and Black. Ensures versatility across applications, with a seamless finish for robust protection. Please note: Our paint is not compatible with copper surfaces

Cromar Grey Cromapol Acrylic Waterproofing Roof Sealant Fibre Reinforced Roof Coat 5Kg

Why We Love It

Instant protection in one coat.
Fibre reinforced for durability.
Personalization with color options.

Main Highlights

One Coat Instant Protection
Waterproofing Roof Sealant
Fibre Reinforced
Available in White, Black, Clear and Grey

8.7

Excellent

We scanned 1990 products

We reviewed these offers relevant to the Flat Roof Waterproofing Paint within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like Cromapol, masterbitumens, SIRAMICO COATINGS, Polar Specialist Coatings, PHIMIITA, Flag Paints, NOVECRAFTO, Ashbrook Roofing, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Flat Roof Waterproofing Paint in the market, we considered we took a deep dive into 9951 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is Cromar Grey Cromapol Acrylic Fibre Reinforced Roof Coat Sealant Paint 4 x 5Kg. We love many things about this product by Cromapol. What sets it apart from the competition is Instant waterproof protection in one coat, Bridges gaps with added fibres, Usable in both dry, damp conditions.
The best value product for most shoppers and where user satisfaction is continuously the highest is Bitumen All Weather Roofing Repair Compound Waterproof Roof Coating 25L by masterbitumens based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Flat Roof Waterproofing Paint and the best cost-to-value ratio is Cromar Grey Cromapol Acrylic Waterproofing Roof Sealant Fibre Reinforced Roof Coat 5Kgat Ashbrook Roofing with a % discount.
Our list of the best Flat Roof Waterproofing Paint is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best Flat Roof Waterproofing Paint in The UK

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Cromar White Cromapol Acrylic Waterproofing Roof Sealant Fibre Reinforced Roof Coat 5Kg

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We scanned 1990 products

We concluded that: