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Best Bostik Flexacryl Roof Repair Compound Grey 5kg of 2026
Last updated on 04/04/2026
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1
Bostik Flexacryl Instant Repair Waterproof Compound for Flat Roofs, Colour: Black, 5kg
Bostik
Why we love it
High performance for emergency repairs.
Immediate waterproofing with one application.
Flexible, long-lasting and resilient.
Main Highlights
A high performance, instant roof repair compound, ideal for emergency repairs or general waterproofing
One coat application providing immediate waterproofing
For wet or dry surfaces, Can be applied in damp conditions
Flexible and long lasting, Contains fibres to bridge gaps
Contents: 1x Bostik Flexacryl Instant Repair for Flat Roofs, Colour: Black, 5kg
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9.8
Exceptional
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9.8
Exceptional
Bostik
Bostik Flexacryl Instant Repair Waterproof Compound for Flat Roofs, Colour: Black, 5kg
Check Price
Show More
Why we love it
High performance for emergency repairs.
Immediate waterproofing with one application.
Flexible, long-lasting and resilient.
Main Highlights
A high performance, instant roof repair compound, ideal for emergency repairs or general waterproofing
One coat application providing immediate waterproofing
For wet or dry surfaces, Can be applied in damp conditions
Flexible and long lasting, Contains fibres to bridge gaps
Contents: 1x Bostik Flexacryl Instant Repair for Flat Roofs, Colour: Black, 5kg
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Value for Money
2
SmartSeal Liquid Roof Repair Black – 5 Litre – Liquid Roof Coating & Leak Repair Sealer for Flat Roofs, Shed Roofs, Gutters, Flashings, Metal, Concrete, Roofing Felt – Waterproof, Seamless Membrane
SmartSeal
Why we love it
Rapid roof leak repair.
Versatile external surface solution.
Simple application process.
Main Highlights
ALL-PURPOSE WATERPROOFING & LEAK REPAIR - SmartSeal Liquid Roof Repair is a multi-purpose, fibre-reinforced waterproof coating specially designed for rapid leak repair and long-lasting roof waterproofing. Ideal for sealing cracks, joints, and small leaks, it creates a seamless, flexible membrane that resists water ingress and weather damage on a wide range of external surfaces.
SUITABLE FOR MULTIPLE ROOF TYPES & SURFACES - Formulated for external use, this liquid roof coating is ideal for flat roofs, shed roofs, gutters, lead flashing, metal roofs, slate, concrete, asphalt, roofing felt, and asbestos surfaces. Its high adhesion and flexible finish make it a trusted choice for domestic and industrial roofing maintenance, protecting against rain, frost, and UV degradation.
EASY TO APPLY & NO PRIMER REQUIRED - SmartSeal Liquid Roof Repair is ready to use and requires no specialist tools or primer. Simply clear the area of moss, dirt, and debris, and ensure it’s dry and free of grease. Apply evenly by brush, trowel, soft broom, or squeegee, depending on the repair size. Once applied, avoid walking on the coated surface until fully cured (approximately 2–3 days).
EXCELLENT COVERAGE & COST-EFFECTIVE PROTECTION - One litre of SmartSeal Liquid Roof Repair covers approximately 1m² on flat surfaces, providing thick, durable, and watertight coverage. Designed to deliver long-term protection, it seals and rejuvenates worn or leaking areas, reducing the need for costly roof replacements or frequent maintenance.
TOUGH, FLEXIBLE & WEATHERPROOF - A professional-grade liquid roof sealer, ideal for flat roof repair, shed roof waterproofing, and gutter sealing. Its seamless waterproof membrane expands and contracts with temperature changes, preventing cracks and leaks. Perfect as a roof leak sealer, waterproof roof coating, or emergency roof repair solution, offering maximum durability, flexibility, and weather resistance year-round.
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9.7
Exceptional
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9.7
Exceptional
SmartSeal
SmartSeal Liquid Roof Repair Black – 5 Litre – Liquid Roof Coating & Leak Repair Sealer for Flat Roofs, Shed Roofs, Gutters, Flashings, Metal, Concrete, Roofing Felt – Waterproof, Seamless Membrane
Check Price
Show More
Why we love it
Rapid roof leak repair.
Versatile external surface solution.
Simple application process.
Main Highlights
ALL-PURPOSE WATERPROOFING & LEAK REPAIR - SmartSeal Liquid Roof Repair is a multi-purpose, fibre-reinforced waterproof coating specially designed for rapid leak repair and long-lasting roof waterproofing. Ideal for sealing cracks, joints, and small leaks, it creates a seamless, flexible membrane that resists water ingress and weather damage on a wide range of external surfaces.
SUITABLE FOR MULTIPLE ROOF TYPES & SURFACES - Formulated for external use, this liquid roof coating is ideal for flat roofs, shed roofs, gutters, lead flashing, metal roofs, slate, concrete, asphalt, roofing felt, and asbestos surfaces. Its high adhesion and flexible finish make it a trusted choice for domestic and industrial roofing maintenance, protecting against rain, frost, and UV degradation.
EASY TO APPLY & NO PRIMER REQUIRED - SmartSeal Liquid Roof Repair is ready to use and requires no specialist tools or primer. Simply clear the area of moss, dirt, and debris, and ensure it’s dry and free of grease. Apply evenly by brush, trowel, soft broom, or squeegee, depending on the repair size. Once applied, avoid walking on the coated surface until fully cured (approximately 2–3 days).
EXCELLENT COVERAGE & COST-EFFECTIVE PROTECTION - One litre of SmartSeal Liquid Roof Repair covers approximately 1m² on flat surfaces, providing thick, durable, and watertight coverage. Designed to deliver long-term protection, it seals and rejuvenates worn or leaking areas, reducing the need for costly roof replacements or frequent maintenance.
TOUGH, FLEXIBLE & WEATHERPROOF - A professional-grade liquid roof sealer, ideal for flat roof repair, shed roof waterproofing, and gutter sealing. Its seamless waterproof membrane expands and contracts with temperature changes, preventing cracks and leaks. Perfect as a roof leak sealer, waterproof roof coating, or emergency roof repair solution, offering maximum durability, flexibility, and weather resistance year-round.
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3
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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9.5
Superb
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9.5
Superb
TekCryl
Waterproofing, Leaking ROOF Repair Coating, Grey, Single Coat. TekCryl 5kg Acrylic (5yr Material Warranty)
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Show More
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
Emergency Roof Repair 5 yr Material Guarantee, Fast Fix, TekCryl (Grey) 5 kg
KoverTek
Why we love it
Assures long-term material reliability.
Addresses various leakage issues effortlessly.
Application process is user-friendly.
Main Highlights
LEAKING ROOF? GUTTER? GARAGE? SHED, ASBESTOS ROOF?
5 YEAR MATERIAL WARRANTY AGAINST FAILURE
SIMPLE SAFE AND EASY TO APPLY
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9.3
Superb
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9.3
Superb
KoverTek
Emergency Roof Repair 5 yr Material Guarantee, Fast Fix, TekCryl (Grey) 5 kg
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Why we love it
Assures long-term material reliability.
Addresses various leakage issues effortlessly.
Application process is user-friendly.
Main Highlights
LEAKING ROOF? GUTTER? GARAGE? SHED, ASBESTOS ROOF?
5 YEAR MATERIAL WARRANTY AGAINST FAILURE
SIMPLE SAFE AND EASY TO APPLY
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5
5 year warranted Roof Sealer, 5 KG Black One Coat Roof Repair Compound (All roof types including Asbestos, Felt, Bitumin, Tiled, GRP)
KoverTek
Why we love it
Long-lasting material, guarantee of 5 years.
Instant waterproofing for damaged areas.
Resists future cracking with elasticity.
Main Highlights
Guaranteed to last min 5yrs (Material warranty)
Water proofs the damaged area quickly and effectively
Brush or Roller Apply Cold Apply No Special Tools Needed
Air drys and shower proof immediately
Gap Fills Cracks and Splits & Elastic Properties Resist Future Cracking
Available in black or grey
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9.3
Superb
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9.3
Superb
KoverTek
5 year warranted Roof Sealer, 5 KG Black One Coat Roof Repair Compound (All roof types including Asbestos, Felt, Bitumin, Tiled, GRP)
Check Price
Show More
Why we love it
Long-lasting material, guarantee of 5 years.
Instant waterproofing for damaged areas.
Resists future cracking with elasticity.
Main Highlights
Guaranteed to last min 5yrs (Material warranty)
Water proofs the damaged area quickly and effectively
Brush or Roller Apply Cold Apply No Special Tools Needed
Air drys and shower proof immediately
Gap Fills Cracks and Splits & Elastic Properties Resist Future Cracking
Available in black or grey
Show More
6
KoverTek TekCryl Acrylic Roofing - Leaking Roof Repair - Fibre Reinforced - 5kg Grey Kit
KoverTek
Why we love it
Waterproofs damaged areas quickly.
No special tools needed.
Fills cracks and splits.
Main Highlights
Water proofs the damaged area quickly and effectively
Brush or Roller Apply Cold Apply No Special Tools Needed
Air drys and shower proof immediately
Fills Cracks and Splits
Show More
9.2
Superb
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9.2
Superb
KoverTek
KoverTek TekCryl Acrylic Roofing - Leaking Roof Repair - Fibre Reinforced - 5kg Grey Kit
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Show More
Why we love it
Waterproofs damaged areas quickly.
No special tools needed.
Fills cracks and splits.
Main Highlights
Water proofs the damaged area quickly and effectively
Brush or Roller Apply Cold Apply No Special Tools Needed
Air drys and shower proof immediately
Fills Cracks and Splits
Show More
7
Laybond Flexacryl Instant Waterproof Compound - Grey 1kg
Bostik
9.0
Superb
Check Price
9.0
Superb
Bostik
Laybond Flexacryl Instant Waterproof Compound - Grey 1kg
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8
Nassboards - Everbuild Evercryl One Coat Repair Compound - 5 Litre Black- Fibre Reinforced Sealant for Roof Reparation - Algae and Fungus Resistant, One Coat Roof Repair - Multi Use & Weather Proof
Nassboards
Why we love it
All-weather roof protection.
Easy application process.
Includes protective gear.
Main Highlights
ALL WEATHER CONDITIONS: Evercryl One Coat Repair Compound, brought to you by Nassboards, is a resin based, fibre reinforced roof repair compound which is effective on all common roofing surfaces, giving instant roof repairs even in the wet and on wet surfaces and can even be applied in frosty conditions down to -5°C!
PROTECTIVE: This One Coat Repair Compound was especially formulated to resist algae and fungal growth. Not only will it protect your roof from algae and fungi, but water damage as well! Keep your roof protected from anything and everything that mother nature throws at it
EASY TO APPLY: Everbuild Evercryl is brush applied and dries to a smooth consistent flexible membrane. Due to the high level of fibre reinforcement, it will fix small cracks and requires only a one-coat brush application to give instant water protection. Evercryl requires no primer on sound nonporous surfaces
BONUS GIFT: With your purchase, you will not only receive your Everbuild Evercryl One Coat Repair Compound, you will also receive protective gloves as well as a 3-inch brush to help give you expert-level application, as well as expert-level protection
COLOUR OPTIONS: Your Everbuild Evercryl One Coat Repair Compound comes in two colours. Black and Grey, we are confident that any of these two colours will compliment your home’s décor, while still staying protective.
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8.9
Excellent
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8.9
Excellent
Nassboards
Nassboards - Everbuild Evercryl One Coat Repair Compound - 5 Litre Black- Fibre Reinforced Sealant for Roof Reparation - Algae and Fungus Resistant, One Coat Roof Repair - Multi Use & Weather Proof
Check Price
Show More
Why we love it
All-weather roof protection.
Easy application process.
Includes protective gear.
Main Highlights
ALL WEATHER CONDITIONS: Evercryl One Coat Repair Compound, brought to you by Nassboards, is a resin based, fibre reinforced roof repair compound which is effective on all common roofing surfaces, giving instant roof repairs even in the wet and on wet surfaces and can even be applied in frosty conditions down to -5°C!
PROTECTIVE: This One Coat Repair Compound was especially formulated to resist algae and fungal growth. Not only will it protect your roof from algae and fungi, but water damage as well! Keep your roof protected from anything and everything that mother nature throws at it
EASY TO APPLY: Everbuild Evercryl is brush applied and dries to a smooth consistent flexible membrane. Due to the high level of fibre reinforcement, it will fix small cracks and requires only a one-coat brush application to give instant water protection. Evercryl requires no primer on sound nonporous surfaces
BONUS GIFT: With your purchase, you will not only receive your Everbuild Evercryl One Coat Repair Compound, you will also receive protective gloves as well as a 3-inch brush to help give you expert-level application, as well as expert-level protection
COLOUR OPTIONS: Your Everbuild Evercryl One Coat Repair Compound comes in two colours. Black and Grey, we are confident that any of these two colours will compliment your home’s décor, while still staying protective.
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9
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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8.8
Excellent
Check Price
8.8
Excellent
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
Check Price
Show More
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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10
Bostik Cempolatex Fibreflex Grey - 20kg - Fibre Reinforced & Highly Flexible Self Level Compound
Bostik
Why we love it
Flexible and durable performance.
Rapid setting for efficiency.
Compatible with underfloor heating.
Main Highlights
A one part, flexible floor levelling compound reinforced with fibre, Designed for use on subfloors where minimal vibration or lateral movement may occur
Rapid setting, Can be applied between 3–30mm thickness in a single application
Suitable for use with underfloor heating systems
Protein and casein free, Can be used over most common subfloors, including mechanically fixed flooring grade plywood (SP101) and P5 chipboard
Contents: 1x Bostik Cempolatex Fibreflex, Fibre-reinforced, Flexible, Rapid Setting Self-Levelling Compound For Interior Floors, 20kg
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8.7
Excellent
Check Price
8.7
Excellent
Bostik
Bostik Cempolatex Fibreflex Grey - 20kg - Fibre Reinforced & Highly Flexible Self Level Compound
Check Price
Show More
Why we love it
Flexible and durable performance.
Rapid setting for efficiency.
Compatible with underfloor heating.
Main Highlights
A one part, flexible floor levelling compound reinforced with fibre, Designed for use on subfloors where minimal vibration or lateral movement may occur
Rapid setting, Can be applied between 3–30mm thickness in a single application
Suitable for use with underfloor heating systems
Protein and casein free, Can be used over most common subfloors, including mechanically fixed flooring grade plywood (SP101) and P5 chipboard
Contents: 1x Bostik Cempolatex Fibreflex, Fibre-reinforced, Flexible, Rapid Setting Self-Levelling Compound For Interior Floors, 20kg
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