Best Roof Repair Mastic of 2025

Last updated on 09/10/2025
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1
Multicrete Bitumen Trowel Mastic Roof Repair Fill Joints Cracks & Splits - 5 litres
Multicrete Bitumen Trowel Mastic Roof Repair Fill Joints Cracks & Splits - 5 litres
Multicrete
Why we love it
  • Resistant to water penetration.
  • Excellent adhesion on materials.
  • Fills joints and cracks.
Main Highlights
  • Fill Joints, Cracks and Splits in Roofing and Building Materials
  • Use on Roofing Felt, Asphalt, Concrete, Asbestos Cement & Metallic Guttering & Drainpipes
  • A typical coverage rate for a 2mm thickness of material is 2m²/litre
  • Resistant to water penetration immediately after application
  • Excellent adhesion
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9.9
Exceptional
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9.9
Exceptional
Multicrete
Multicrete Bitumen Trowel Mastic Roof Repair Fill Joints Cracks & Splits - 5 litres
Why we love it
  • Resistant to water penetration.
  • Excellent adhesion on materials.
  • Fills joints and cracks.
Main Highlights
  • Fill Joints, Cracks and Splits in Roofing and Building Materials
  • Use on Roofing Felt, Asphalt, Concrete, Asbestos Cement & Metallic Guttering & Drainpipes
  • A typical coverage rate for a 2mm thickness of material is 2m²/litre
  • Resistant to water penetration immediately after application
  • Excellent adhesion
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Value for Money
2
SIRAMICO COATINGS Leak Stop Rapid Leak Repair Paint Instant Waterproof Leak Sealer | GREY 1 Litre | Perfect for Flat and Pitched Felt, Shed & Garage Roofs | Easy to Apply & Fast Dry
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SIRAMICO COATINGS Leak Stop Rapid Leak Repair Paint Instant Waterproof Leak Sealer | GREY 1 Litre | Perfect for Flat and Pitched Felt, Shed & Garage Roofs | Easy to Apply & Fast Dry
SIRAMICO COATINGS
Why we love it
  • Instant waterproofing for various surfaces.
  • Single coat, no primer necessary.
  • Enhanced with fibres for durability.
Main Highlights
  • DURABLE PROTECTION - Leak Stop Rapid Leak Repair Paint has a tough and durable finish suitable for immediately sealing damaged and leaking roof surfaces such as flat roofs, felt, bitumen, garages, sheds etc. Durable and resilient, it protects against damage from the elements.
  • READY TO USE - Leak Stop Rapid Leak Repair Paint is ready to use, no primer required before application. Easy to use, simply apply Leak Repair Paint immediately for instant waterproof protection. Thoroughly clean the affected area of moss, debris and surface water, oil or grease before starting.
  • APPLICATION - Apply Siramico's Leak Stop Rapid Leak Repair Paint by brush or roller. The drying time is between 15-30 minutes. One coat is sufficient.
  • PROFESSIONAL GRADE FINISH - The Rapid Leak Repair Paint gives a smooth professional looking finish with instant protection. The fast drying formula ensures minimal downtime. Ideal for both domestic and commercial use, it provides a reliable solution to all your waterproofing needs.
  • INSTANT PROTECTION - Designed to be tough and provide instant protection, this sealant is perfect for emergency repairs or maintenance to drains, gutters and roofs. Provides long lasting protection to cracked surfaces in all weather conditions.
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9.8
Exceptional
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9.8
Exceptional
SIRAMICO COATINGS
SIRAMICO COATINGS Leak Stop Rapid Leak Repair Paint Instant Waterproof Leak Sealer | GREY 1 Litre | Perfect for Flat and Pitched Felt, Shed & Garage Roofs | Easy to Apply & Fast Dry
Why we love it
  • Instant waterproofing for various surfaces.
  • Single coat, no primer necessary.
  • Enhanced with fibres for durability.
Main Highlights
  • DURABLE PROTECTION - Leak Stop Rapid Leak Repair Paint has a tough and durable finish suitable for immediately sealing damaged and leaking roof surfaces such as flat roofs, felt, bitumen, garages, sheds etc. Durable and resilient, it protects against damage from the elements.
  • READY TO USE - Leak Stop Rapid Leak Repair Paint is ready to use, no primer required before application. Easy to use, simply apply Leak Repair Paint immediately for instant waterproof protection. Thoroughly clean the affected area of moss, debris and surface water, oil or grease before starting.
  • APPLICATION - Apply Siramico's Leak Stop Rapid Leak Repair Paint by brush or roller. The drying time is between 15-30 minutes. One coat is sufficient.
  • PROFESSIONAL GRADE FINISH - The Rapid Leak Repair Paint gives a smooth professional looking finish with instant protection. The fast drying formula ensures minimal downtime. Ideal for both domestic and commercial use, it provides a reliable solution to all your waterproofing needs.
  • INSTANT PROTECTION - Designed to be tough and provide instant protection, this sealant is perfect for emergency repairs or maintenance to drains, gutters and roofs. Provides long lasting protection to cracked surfaces in all weather conditions.
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3
Waterproofing, Leaking ROOF Repair Coating, Grey, Single Coat. TekCryl 5kg Acrylic (5yr Material Warranty)
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Waterproofing, Leaking ROOF Repair Coating, Grey, Single Coat. TekCryl 5kg Acrylic (5yr Material Warranty)
TekCryl
Why we love it
  • Versatile application on surfaces.
  • Low smell and VOC.
  • Comes with 5-year guarantee.
Main Highlights
  • LEAKING ROOF? GUTTER? GARAGE? SHED?
  • USE ON FELT, BITUMEN, STEEL, WOOD, CONCRETE, ASBESTOS
  • BRUSH OR ROLLER APPLIED GREY COLOURED
  • SOLVENT BASED BUT LOW SMELL LOW VOC
  • PROFESSIONAL PRODUCT WITH 5 YR GUARANTEE
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9.6
Superb
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9.6
Superb
TekCryl
Waterproofing, Leaking ROOF Repair Coating, Grey, Single Coat. TekCryl 5kg Acrylic (5yr Material Warranty)
Why we love it
  • Versatile application on surfaces.
  • Low smell and VOC.
  • Comes with 5-year guarantee.
Main Highlights
  • LEAKING ROOF? GUTTER? GARAGE? SHED?
  • USE ON FELT, BITUMEN, STEEL, WOOD, CONCRETE, ASBESTOS
  • BRUSH OR ROLLER APPLIED GREY COLOURED
  • SOLVENT BASED BUT LOW SMELL LOW VOC
  • PROFESSIONAL PRODUCT WITH 5 YR GUARANTEE
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4
Everbuild Black Jack 905 – All Weather Roof Coating – Solvent-Based – Fibre-Reinforced – Fast Drying – Weatherproof – Black – 5 Litre
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Everbuild Black Jack 905 – All Weather Roof Coating – Solvent-Based – Fibre-Reinforced – Fast Drying – Weatherproof – Black – 5 Litre
Everbuild
35% Off
Why we love it
  • Quick drying for efficient use.
  • Super strong, weatherproof finish.
  • Versatile, complete waterproof coating.
Main Highlights
  • QUICK DRYING FORMULA – This brushable bitumen compound dries fast and is ready for a second coat in 24 hours.
  • SUPER STRONG FINISH – Solvent-based formula with added fibres to reinforce the strength and weatherproofing of the coating.
  • IDEAL FOR WEATHERPROOFING APPLICATIONS – Designed to deliver an immediate waterproof coating to non-plastic guttering, structural steelwork and other roofing applications.
  • SUITABLE FOR USE ON A RANGE OF SUBSTRATES – Use it to reseal and weatherproof a range of materials, including asphalt and felt roofing, concrete decks and sheeting, metal sheeting, tiles and more.
  • COMPLETE WATERPROOF COATING – Versatile enough to use as a protective barrier on walls and roofs to prevent water and vapour entry.
  • A CHOICE OF SIZES – Available in both 5-litre and 25-litre tins to suit your project size.
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9.6
Superb
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9.6
Superb
Everbuild
Everbuild Black Jack 905 – All Weather Roof Coating – Solvent-Based – Fibre-Reinforced – Fast Drying – Weatherproof – Black – 5 Litre
35% Off
Why we love it
  • Quick drying for efficient use.
  • Super strong, weatherproof finish.
  • Versatile, complete waterproof coating.
Main Highlights
  • QUICK DRYING FORMULA – This brushable bitumen compound dries fast and is ready for a second coat in 24 hours.
  • SUPER STRONG FINISH – Solvent-based formula with added fibres to reinforce the strength and weatherproofing of the coating.
  • IDEAL FOR WEATHERPROOFING APPLICATIONS – Designed to deliver an immediate waterproof coating to non-plastic guttering, structural steelwork and other roofing applications.
  • SUITABLE FOR USE ON A RANGE OF SUBSTRATES – Use it to reseal and weatherproof a range of materials, including asphalt and felt roofing, concrete decks and sheeting, metal sheeting, tiles and more.
  • COMPLETE WATERPROOF COATING – Versatile enough to use as a protective barrier on walls and roofs to prevent water and vapour entry.
  • A CHOICE OF SIZES – Available in both 5-litre and 25-litre tins to suit your project size.
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5
Ronseal TERRM750 Thompsons Emergency Roof Repair Mastic 750 ml, Black
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Ronseal TERRM750 Thompsons Emergency Roof Repair Mastic 750 ml, Black
Ronseal
7% Off
Why we love it
  • Effortless application process.
  • Designed for comfort.
  • User-friendly interface.
Main Highlights
  • Easy application
  • Ergonomic design
  • Easy to use
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9.5
Superb
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9.5
Superb
Ronseal
Ronseal TERRM750 Thompsons Emergency Roof Repair Mastic 750 ml, Black
7% Off
Why we love it
  • Effortless application process.
  • Designed for comfort.
  • User-friendly interface.
Main Highlights
  • Easy application
  • Ergonomic design
  • Easy to use
Show More
6
Gorilla 84756 Waterproof Coat & Seal Black 473ml
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Gorilla 84756 Waterproof Coat & Seal Black 473ml
Gorilla
Free Shipping
Why we love it
  • Superior sealing power.
  • Thick, durable coat.
  • Elegant black finish.
Main Highlights
  • Easy to use
  • Value for money
  • Design & durable
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9.5
Superb
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9.5
Superb
Gorilla
Gorilla 84756 Waterproof Coat & Seal Black 473ml
Free Shipping
Why we love it
  • Superior sealing power.
  • Thick, durable coat.
  • Elegant black finish.
Main Highlights
  • Easy to use
  • Value for money
  • Design & durable
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7
Thompsons 10 Year Roof Seal Grey 1L
Thompsons 10 Year Roof Seal Grey 1L
Thompson's
5% OffFree Shipping
Why we love it
  • Flexes with natural roof movement.
  • Has sun's UV ray resistance.
  • Rainproof in just 6 hours.
Main Highlights
  • Flexes with the natural movement of the roof
  • Resists the sun's UV rays, so colour won't fade
  • Rainproof in 6 hours
  • Outperforms standard bitumen paint
  • The fast acting formula is rainproof in just 6 hours.
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9.4
Superb
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9.4
Superb
Thompson's
Thompsons 10 Year Roof Seal Grey 1L
5% OffFree Shipping
Why we love it
  • Flexes with natural roof movement.
  • Has sun's UV ray resistance.
  • Rainproof in just 6 hours.
Main Highlights
  • Flexes with the natural movement of the roof
  • Resists the sun's UV rays, so colour won't fade
  • Rainproof in 6 hours
  • Outperforms standard bitumen paint
  • The fast acting formula is rainproof in just 6 hours.
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8
Waterproof Grey Roof Sealant | Extra Strong Flat and Shed Roof Sealant with Glass Fibers | Fix & Stop Leak for Gutters, Joints, Cracks | Leak Sealer Repair | TopBase ST Fiber | Grey | Made in EU (1kg)
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Waterproof Grey Roof Sealant | Extra Strong Flat and Shed Roof Sealant with Glass Fibers | Fix & Stop Leak for Gutters, Joints, Cracks | Leak Sealer Repair | TopBase ST Fiber | Grey | Made in EU (1kg)
Pandacoat
Free Shipping
Why we love it
  • Long-lasting waterproof protection.
  • Reinforced for added strength.
  • Versatile for multiple applications.
Main Highlights
  • EXTRA-STRONG ROOF SEALANT WITH GLASS FIBERS – TopBase ST Fiber is reinforced with embedded glass fibers for superior strength and flexibility. Perfect for sealing cracks, joints, and damaged roof areas.
  • WATERPROOF SEAL FOR FLAT & SHED ROOFS – Specially formulated as a durable flat roof sealant and shed roof paint waterproof alternative, offering a resilient barrier against rain and weather damage.
  • EFFECTIVE FIX FOR LEAKS IN GUTTERS, JOINTS & DETAILS – Quickly stop leaks and restore surfaces. Ideal for use on roofing details, gutter sealing, and minor roof repairs without complicated tools.
  • DURABLE & WEATHER-RESISTANT LEAK SEALER – Designed to withstand heavy rain, UV rays, and extreme temperatures, TopBase ST Fiber provides long-lasting protection and leak prevention.
  • EASY TO APPLY & MADE IN EU – Ready-to-use formula. Simply brush or roll on for an immediate waterproof finish. Proudly manufactured in the EU to high quality standards.
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9.3
Superb
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9.3
Superb
Pandacoat
Waterproof Grey Roof Sealant | Extra Strong Flat and Shed Roof Sealant with Glass Fibers | Fix & Stop Leak for Gutters, Joints, Cracks | Leak Sealer Repair | TopBase ST Fiber | Grey | Made in EU (1kg)
Free Shipping
Why we love it
  • Long-lasting waterproof protection.
  • Reinforced for added strength.
  • Versatile for multiple applications.
Main Highlights
  • EXTRA-STRONG ROOF SEALANT WITH GLASS FIBERS – TopBase ST Fiber is reinforced with embedded glass fibers for superior strength and flexibility. Perfect for sealing cracks, joints, and damaged roof areas.
  • WATERPROOF SEAL FOR FLAT & SHED ROOFS – Specially formulated as a durable flat roof sealant and shed roof paint waterproof alternative, offering a resilient barrier against rain and weather damage.
  • EFFECTIVE FIX FOR LEAKS IN GUTTERS, JOINTS & DETAILS – Quickly stop leaks and restore surfaces. Ideal for use on roofing details, gutter sealing, and minor roof repairs without complicated tools.
  • DURABLE & WEATHER-RESISTANT LEAK SEALER – Designed to withstand heavy rain, UV rays, and extreme temperatures, TopBase ST Fiber provides long-lasting protection and leak prevention.
  • EASY TO APPLY & MADE IN EU – Ready-to-use formula. Simply brush or roll on for an immediate waterproof finish. Proudly manufactured in the EU to high quality standards.
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9
6 X Everbuild Roof & Gutter Butyl Sealant Black Waterproof and Sealing
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6 X Everbuild Roof & Gutter Butyl Sealant Black Waterproof and Sealing
Everbuild
Why we love it
  • Innovative and efficient solutions.
  • Sustainable and eco-friendly options.
  • Trusted since 1927.
Main Highlights
  • Sika / Everbuild Products offer a full range of products for both the professional market and DIY consumer
  • Efficient use of energy and natural resources are crucial to sustainable development. Sika aims to minimize the impact on climate change by reducing energy consumption, with the positive effect of lowering costs and increasing competitiveness.
  • Sika’s objective centers on supplying customers with innovative solutions that boost the efficiency, durability and aesthetic appeal of buildings, infrastructure constructions, installations and vehicles. Sika solutions are developed to help customers to make a positive environmental impact, or to address climate-related concerns.
  • As a global company, Sika is committed to sustainable development. The company honors its responsibilities by offering sustainable solutions for energy-efficient constructions and environmentlly friendly vehicles. It also implements numerous projects and measures aimed at boosting the Group’s business, social, and ecological sustainability.
  • Sika Group was established in 1927 and produces and markets a wide range of state-of-the-art systems covering construction products, industrial manufacturing, automotive manufacturing and DIY products ranges
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9.2
Superb
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9.2
Superb
Everbuild
6 X Everbuild Roof & Gutter Butyl Sealant Black Waterproof and Sealing
Why we love it
  • Innovative and efficient solutions.
  • Sustainable and eco-friendly options.
  • Trusted since 1927.
Main Highlights
  • Sika / Everbuild Products offer a full range of products for both the professional market and DIY consumer
  • Efficient use of energy and natural resources are crucial to sustainable development. Sika aims to minimize the impact on climate change by reducing energy consumption, with the positive effect of lowering costs and increasing competitiveness.
  • Sika’s objective centers on supplying customers with innovative solutions that boost the efficiency, durability and aesthetic appeal of buildings, infrastructure constructions, installations and vehicles. Sika solutions are developed to help customers to make a positive environmental impact, or to address climate-related concerns.
  • As a global company, Sika is committed to sustainable development. The company honors its responsibilities by offering sustainable solutions for energy-efficient constructions and environmentlly friendly vehicles. It also implements numerous projects and measures aimed at boosting the Group’s business, social, and ecological sustainability.
  • Sika Group was established in 1927 and produces and markets a wide range of state-of-the-art systems covering construction products, industrial manufacturing, automotive manufacturing and DIY products ranges
Show More
10
CROMAR Trowel Mastic – Heavy-Duty Bituminous Mastic for Roofing and Building Repairs | 2.5L
CROMAR Trowel Mastic – Heavy-Duty Bituminous Mastic for Roofing and Building Repairs | 2.5L
ARA CHOICE
Main Highlights
  • Versatile Repair Solution: Perfect for filling joints, cracks, and splits in roofing felt, asphalt, concrete, asbestos cement, and metallic guttering and drainpipes.
  • Immediate Water Resistance: Protects against water penetration immediately after application.
  • Easy Application: Apply using a trowel or putty knife for smooth, efficient repairs.
  • Reinforcement for Large Cracks: Use with glass fibre scrim for cracks or joints over 3mm.
  • Indefinite Shelf Life: Long-lasting with proper storage conditions.
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9.0
Superb
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9.0
Superb
ARA CHOICE
CROMAR Trowel Mastic – Heavy-Duty Bituminous Mastic for Roofing and Building Repairs | 2.5L
Main Highlights
  • Versatile Repair Solution: Perfect for filling joints, cracks, and splits in roofing felt, asphalt, concrete, asbestos cement, and metallic guttering and drainpipes.
  • Immediate Water Resistance: Protects against water penetration immediately after application.
  • Easy Application: Apply using a trowel or putty knife for smooth, efficient repairs.
  • Reinforcement for Large Cracks: Use with glass fibre scrim for cracks or joints over 3mm.
  • Indefinite Shelf Life: Long-lasting with proper storage conditions.
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We scanned 725 products

We reviewed these offers relevant to the Roof Repair Mastic 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 Multicrete, SIRAMICO COATINGS, TekCryl, Everbuild, Ronseal, Gorilla, Thompson's, Pandacoat, ARA CHOICE, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.
For the best Roof Repair Mastic in the market, we considered we took a deep dive into 3626 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: