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10 bestExterior Sealantsof September 2025

112M consumers helped this year.

15% off

1

Polar Clear Leak Fix Spray - 400ml - Waterproof Roof Sealant - Instantly Seals Leaks and Cracks, for Lasting Protection on Roofs, Drainpipes and Gutter Repairs, for Interior and Exterior Use

Polar Clear Leak Fix Spray - 400ml - Waterproof Roof Sealant - Instantly Seals Leaks and Cracks, for Lasting Protection on Roofs, Drainpipes and Gutter Repairs, for Interior and Exterior Use

Polar Clear Leak Fix Spray - 400ml - Waterproof Roof Sealant - Instantly Seals Leaks and Cracks, for Lasting Protection on Roofs, Drainpipes and Gutter Repairs, for Interior and Exterior Use

Polar Specialist Coatings

10.0

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13% off

2

Sika Stixall – Extreme Power Sealant And Adhesive – Waterproof – Black – 290ml

Sika Stixall – Extreme Power Sealant And Adhesive – Waterproof – Black – 290ml

Sika Stixall – Extreme Power Sealant And Adhesive – Waterproof – Black – 290ml

Sika

10.0

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3

Stormdry Masonry Waterproofing Cream (1 Litre) 25 Year BBA Approved Exterior Brick Sealer. Breathable, Colourless Brick, Concrete, Stone, Mortar, Sandstone & Granite Waterproofer

Stormdry Masonry Waterproofing Cream (1 Litre) 25 Year BBA Approved Exterior Brick Sealer. Breathable, Colourless Brick, Concrete, Stone, Mortar, Sandstone & Granite Waterproofer

Stormdry Masonry Waterproofing Cream (1 Litre) 25 Year BBA Approved Exterior Brick Sealer. Breathable, Colourless Brick, Concrete, Stone, Mortar, Sandstone & Granite Waterproofer

Stormdry

9.8

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4

Clear Transparent 300ml Hybrid Polymer Sealant Adhesive Construction Joint Waterproof Curable Weatherproof Seal Paintable Odourless Wood Plastic Metal Stone Window Door Roof Gutter Leak Grab - 1 Pack

Clear Transparent 300ml Hybrid Polymer Sealant Adhesive Construction Joint Waterproof Curable Weatherproof Seal Paintable Odourless Wood Plastic Metal Stone Window Door Roof Gutter Leak Grab - 1 Pack

Clear Transparent 300ml Hybrid Polymer Sealant Adhesive Construction Joint Waterproof Curable Weatherproof Seal Paintable Odourless Wood Plastic Metal Stone Window Door Roof Gutter Leak Grab - 1 Pack

Hemway

9.6

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5

Everbuild General Purpose Silicone Sealant – Waterproof – Suitable for Interior and Exterior Use – Clear – 280ml

Everbuild General Purpose Silicone Sealant – Waterproof – Suitable for Interior and Exterior Use – Clear – 280ml

Everbuild General Purpose Silicone Sealant – Waterproof – Suitable for Interior and Exterior Use – Clear – 280ml

Everbuild

9.3

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OtherRelated productsUp to 38% off

Unibond Outdoor Extreme Repair - Translucent 294g

Unibond Outdoor Extreme Repair - Translucent 294g

UniBond Outdoor Window and Door Frame Sealant, White Outdoor Sealant, Durable Weatherproof Door and Window Sealant, Cartridge

UniBond Outdoor Window and Door Frame Sealant, White Outdoor Sealant, Durable Weatherproof Door and Window Sealant, Cartridge

300g Invisible Waterproof Anti-Leaking Sealant Agent, Transparent Waterproof Coating Agent, Waterproof Insulation Sealant, Coating Tile Trapping Repair Wall Mending Agent for Home Roof Bathroom

300g Invisible Waterproof Anti-Leaking Sealant Agent, Transparent Waterproof Coating Agent, Waterproof Insulation Sealant, Coating Tile Trapping Repair Wall Mending Agent for Home Roof Bathroom

Everbuild – Everflex – 225 Contract Industrial & Glazing Silicone – Industrial and Glazing Sealant – Adheres to Most Common Building Materials – Transparent – 295ml

Everbuild – Everflex – 225 Contract Industrial & Glazing Silicone – Industrial and Glazing Sealant – Adheres to Most Common Building Materials – Transparent – 295ml

6

Raincheck Water Seal 5 Litre - Breathable, Colourless Waterproofer for Brick, Stone, Mortar & Concrete

Raincheck Water Seal 5 Litre - Breathable, Colourless Waterproofer for Brick, Stone, Mortar & Concrete

Raincheck Water Seal 5 Litre - Breathable, Colourless Waterproofer for Brick, Stone, Mortar & Concrete

SAFEGUARD

9.1

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7

Clear Silicone Sealant | Multipurpose Waterproof Silicone Sealant CLEAR | Transparent Bathroom & Kitchen Silicone Sealant x 2 70g Tubes

Clear Silicone Sealant | Multipurpose Waterproof Silicone Sealant CLEAR | Transparent Bathroom & Kitchen Silicone Sealant x 2 70g Tubes

Clear Silicone Sealant | Multipurpose Waterproof Silicone Sealant CLEAR | Transparent Bathroom & Kitchen Silicone Sealant x 2 70g Tubes

ABL Supplies

8.8

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28% off

8

Gorilla 1144110 All Conditions Sealant Silicone Clear 295ml

Gorilla 1144110 All Conditions Sealant Silicone Clear 295ml

Gorilla 1144110 All Conditions Sealant Silicone Clear 295ml

Gorilla

8.6

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9

Everbuild General Purpose Silicone Sealant – Waterproof – Suitable for Interior and Exterior Use – White – 280ml

Everbuild General Purpose Silicone Sealant – Waterproof – Suitable for Interior and Exterior Use – White – 280ml

Everbuild General Purpose Silicone Sealant – Waterproof – Suitable for Interior and Exterior Use – White – 280ml

Everbuild

8.3

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10

RONSEAL 36286 Thompsons Water Seal 5 Litre (TWSEAL5L), Clear

RONSEAL 36286 Thompsons Water Seal 5 Litre (TWSEAL5L), Clear

RONSEAL 36286 Thompsons Water Seal 5 Litre (TWSEAL5L), Clear

Thompson's Water Seal

8.1

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