Thompson’s 10 Year Roof Seal Black for Long-Lasting Repair

Manufactured by Thompson's

Thompson’s 10 Year Roof Seal Black is a premium, long-lasting roof coating with exceptional waterproofing and flexible protection. Formulated with advanced acrylic polymers, this professional-grade seal flexes with the natural movement of the roof, creating a durable membrane that resists cracking, peeling, and UV degradation for up to 10 years. Its deep black finish restores a uniform appearance while shielding against fading caused by sun exposure.

Unlike traditional bitumen paints, Thompson’s 10 Year Roof Seal offers superior adhesion and elasticity, ensuring a weatherproof barrier that withstands heavy rain, frost, and seasonal temperature changes. The fast-acting formula is rainproof in as little as 6 hours, allowing for reliable same-day protection and quick project turnaround.

Ideal for repairing or renewing flat and pitched roofs, roofing felt, asphalt, cement, slate, tiles, and corrugated sheets, this versatile coating seals minor cracks and imperfections while preventing ponding water damage. Manufactured in the UK, it provides a dependable solution for homeowners and contractors seeking professional results with easy application and minimal maintenance.

Key Features & Benefits

Long-lasting protection: Creates a flexible waterproof membrane with up to 10 years of durability.
Fast rain proofing: Becomes rainproof within 6 hours for quick project completion.
UV resistant: Maintains colour and prevents fading from harsh sunlight.
Superior flexibility: Expands and contracts with roof movement to prevent cracking.
Easy application: Brush, roller, or broom, friendly for hassle-free use.
Versatile coverage: It is suitable for flat roofs, roofing felt, cement, tiles, slate, and corrugated metal.
Low maintenance: Provides a seamless, weatherproof finish that reduces the need for frequent repairs.

Ideal Uses

Flat or pitched roofs in residential or commercial settings
Roofing felt, asphalt, and cement surfaces.
Slate, tiles, and corrugated sheet roofs
Weatherproofing roof repairs and patching minor cracks
Restoring colour and protection to aged roofing materials

Sizes & Coverage

Available in a 4 L tin
Coverage: up to 1–2 m² per litre per coat, depending on surface texture and porosity
Two coats recommended for maximum durability

Why Choose Thompson’s 10 Year Roof Seal Black
This advanced roof sealant outperforms standard bitumen paints by combining fast rain proofing with long-term flexibility. Its UV-resistant black coating maintains appearance and protection in all weather conditions, ensuring roofs stay dry and secure year after year.

Surface Preparation
Start by thoroughly cleaning the roof with a stiff-bristle brush to remove dirt, dust, moss, and loose debris. Repair any structural faults, including lifting felt, cracks, or blisters, and make sure any ponding water is dehydrated. Cut open old blisters for felt roofs and secure the felt with tacks to create a stable, even surface.

Mixing
Before and during application, stir the tin thoroughly to ensure the coating remains smooth and consistent. This helps maintain an even colour and texture throughout the job.

Application Method
Depending on the roof size and access, apply Thompson’s 10 Year Roof Seal using a brush, roller, or soft broom—work in long, smooth strokes, covering the entire area evenly to create a continuous waterproof membrane. A priming coat may be required for optimal adhesion on highly porous surfaces.

Coating & Coverage
Apply the first coat generously to seal all cracks and pores. Allow at least 6 hours of drying before applying a second coat to achieve maximum durability and flexibility. Two full coats are recommended to provide the promised 10-year protection. Coverage is approximately 1–2 m² per litre per coat, depending on surface texture and porosity.

Curing & Weather Considerations
For best results, apply on a dry day when temperatures are above 10°C. Avoid application in damp or freezing conditions as drying times will increase. Once applied, the surface becomes rainproof in 6 hours, offering same-day weather protection.

Clean-Up
Clean all brushes, rollers, and equipment with warm water and mild detergent before the product cures. Dispose of waste responsibly in line with local environmental regulations.

Pro Tips

Work from the roof's highest point downward to prevent stepping on freshly coated areas.
Check weather forecasts to avoid unexpected rainfall during the drying period.
A third light coat may improve long-term performance for heavily weathered or rough surfaces.

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Frequently Asked Questions

What is Thompson’s 10 Year Roof Seal used for?

It is a high-performance waterproof coating designed to repair and protect flat and pitched roofs. It seals cracks, prevents leaks, and flexes with the roof to provide long-term weatherproofing.

Can it be applied to all types of roofs?

It suits felt, asphalt, concrete, slate, and corrugated sheet roofs. However, ensure the surface is clean, dry, and structurally sound before application.

How long does Thompson’s 10 Year Roof Seal last?

When applied correctly in two coats, it provides up to 10 years of protection against rain, UV rays, and weather-related damage.

How quickly does the coating become rainproof?

The product is rainproof in as little as 6 hours, making it ideal for same-day application even in unpredictable weather.

What preparation is required before applying the product?

Clean the roof thoroughly with a stiff brush to remove dust, moss, and loose debris. Repair cracks, secure loose felt, and ensure any ponding water is dry.

Can it be applied in cold or damp weather?

It is best applied on dry days when the temperature is above 10 °C. Cold or damp conditions can extend drying and recoat times.

How many coats are needed for complete protection?

At least two full coats are recommended for maximum durability. A third coat may be applied to heavily weathered or porous surfaces.

What tools can be used to apply the roof seal?

Depending on the size of the roof and ease of access, you can use a brush, roller, or soft broom.

How much area does a 4 L tin cover?

Coverage varies depending on surface texture and porosity but typically averages 1–2 m² per litre per coat, giving up to 8 m² of coverage per coat with a 4 L tin.

Does the product resist UV rays?

Yes, it contains UV-resistant additives that help prevent colour fading and material breakdown caused by prolonged sun exposure.

Can it be used to seal hairline cracks?

Yes, it penetrates and fills small cracks, forming a flexible waterproof membrane that moves with the roof’s natural expansion and contraction.

How do I clean the tools after application?

Clean brushes, rollers, or brooms immediately after use with warm water and mild detergent before the product fully cures.

Is Thompson’s 10 Year Roof Seal safe for pets and plants?

Once dry, it is safe and weatherproof. During application, keep pets and plants away from the area to avoid contact with the wet product.

Can it be applied over old bitumen paint?

Yes, but the existing coating must be well-adhered and free of loose or flaky material to ensure proper bonding.

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£44.99 (inc VAT)

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Delivery within 24 to 48 hours

Size

4LTR

Colour

Black

Product variants

*subject to stock levels at the time of your order.

Thompson’s 10 Year Roof Seal Black for Long-Lasting Repair

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