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Sealants

Plug every hole in the house, and keep creeping moisture from making its way into any cracks and crevices with a damp proof sealant. Inside the home or outside, you can take control of moisture with our range of products.

If you’ve seen a few spots of damp in your home, don’t despair. We’ve got sealant for damp walls that will help you put an end to those unwanted patches. Paint over damp surfaces in your home with it, and create a breathable membrane that will stop the reoccurrence of damp in that area.

Protect your exterior from the elements too, with waterproof sealant that provides an invisible, yet highly protective layer to prevent damp forming in your walls. Explore the full range of damp proofing sealants for walls online or in-store today.

384 products found
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save£3

Evo-Stik Evo-Seal Clear Multipurpose Silicone Tube 290ml
£5.00
£8.00

38% off

  • In stock for delivery
  • Click & Collect unavailable

save£10

Hemway Premium All-in-One Jet Black Sealant and Adhesive 300ml 9 Pack
£60.00
£70.00

14% off

  • In stock for delivery
  • Click & Collect unavailable

save£9.50

Hemway Premium All-in-One Light Grey Sealant and Adhesive 300ml 3 Pack
£24.50
£34.00

28% off

  • In stock for delivery
  • Click & Collect unavailable

save£63

Evo-Stik Evo-Seal White Multipurpose Silicone Tube 290ml 12 Pack
£56.00
£119.00

53% off

  • In stock for delivery
  • Click & Collect unavailable

save£9.50

Hemway Premium All-in-One Jet Black Sealant and Adhesive 300ml 3 Pack
£24.50
£34.00

28% off

  • In stock for delivery
  • Click & Collect unavailable

save£2

Corotherm Clickfit White Low Modulus Silicone Sealant 310ml
£14.00
£16.00

13% off

  • In stock for delivery
  • Click & Collect unavailable

save£8.50

Hemway Premium All-in-One Bright White Sealant and Adhesive 300ml 9 Pack
£45.50
£54.00

16% off

  • In stock for delivery
  • Click & Collect unavailable

save£2

UniBond General Purpose Translucent Silicone Sealant Cartridge 273g 2 Pack
£12.00
£14.00

14% off

  • In stock for delivery
  • Click & Collect unavailable

save£10

Hemway Premium All-in-One Crystal Clear Sealant and Adhesive 300ml 9 Pack
£60.00
£70.00

14% off

  • In stock for delivery
  • Click & Collect unavailable

save£1.99

Spear & Jackson Ready to Use Paving Sealant and Proofer with Long Hose Trigger Spray 2.5L
£16.00
£17.99

11% off

  • In stock for delivery
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save£1.95

StoneCare4U Essential Perfect Grout Treatment Primer 500ml
£15.00
£16.95

12% off

  • In stock for delivery
  • Click & Collect unavailable

save£10

Hemway Premium All-in-One Light Grey Sealant and Adhesive 300ml 9 Pack
£60.00
£70.00

14% off

  • In stock for delivery
  • Click & Collect unavailable

save£3

UniBond Indoor General Purpose White Silicone Sealant Cartridge 273 g 2 Pack
£13.00
£16.00

19% off

  • In stock for delivery
  • Click & Collect unavailable

save£63

Evo-Stik Evo-Seal Clear Multipurpose Silicone Tube 290ml 12 Pack
£56.00
£119.00

53% off

  • In stock for delivery
  • Click & Collect unavailable

save£4

Evo-Stik Evo-Seal White Multipurpose Silicone Tube 290ml
£5.00
£9.00

44% off

  • In stock for delivery
  • Click & Collect unavailable

save£9.50

Hemway Crystal Clear All-in-One Construction Hybrid Polymer Sealant and Adhesive 300ml 3 Pack
£24.50
£34.00

28% off

  • In stock for delivery
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StoneCare4U Essential Brick Waterproofer 3L
£64.95
  • In stock for delivery
  • Click & Collect unavailable
MAPEI Mapeisil AC 299 Limestone Silicone Sealant 310ml
£18.00
  • In stock for delivery
  • Click & Collect unavailable
StoneCare4U Essential Green Away 5L 3 Pack
£59.95
  • In stock for delivery
  • Click & Collect unavailable
MAPEI Mapeisil AC 111 Silver Grey Silicone Sealant 310ml
£18.00
  • In stock for delivery
  • Click & Collect unavailable
SmartSeal Matt Imprinted Concrete Sealer 25L
£169.00
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

SmartSeal Dry Finish Natural Stone Sealer 5L 2 Pack
£129.95
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

SmartSeal Matt Block Paving Sealer 5L 3 Pack
£119.95
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

MAPEI Mapeisil AC 136 Mud Silicone Sealant 310ml
£18.00
  • In stock for delivery
  • Click & Collect unavailable
SmartSeal External Concrete Sealer 5L 2 Pack
£86.00
  • In stock for delivery
  • Click & Collect unavailable
StoneCare4U Essential Porcelain Sealer 5L
£84.95
  • In stock for delivery
  • Click & Collect unavailable
SmartSeal Porcelain Tile Sealer 1L and Tile Cleaner 1L Bundle
£41.95
  • In stock for delivery
  • Click & Collect unavailable
SmartSeal Silk Imprinted Concrete Sealer 25L
£169.00
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

New
Hemway Premium All-in-One Light Grey Sealant and Adhesive 300ml
£12.00
  • In stock for delivery
  • Click & Collect unavailable
StoneCare4U Essential Roof Cleaner 5L 3 Pack
£79.00
  • In stock for delivery
  • Click & Collect unavailable
SmartSeal Roof Tile Sealer 25L
£239.95
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

StoneCare4U Essential Porcelain Sealer 5L 3 Pack
£195.95
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

StoneCare4U Essential Satin Finish Limestone Sealer 5L
£56.95
  • In stock for delivery
  • Click & Collect unavailable
StoneCare4U Essential De-Icer 10kg 4 Pack
£159.00
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

MAPEI Mapeisil AC 143 Terracotta Silicone Sealant 310ml
£18.00
  • In stock for delivery
  • Click & Collect unavailable
White Exterior Frame Sealant 300ml
£3.99
  • In stock for delivery
  • Click & Collect unavailable
StoneCare4U Essential Matt Finish All Stone Sealer 5L
£54.95
  • In stock for delivery
  • Click & Collect unavailable
SmartSeal Patio ColourSeal Dark Grey 5L 3 Pack
£179.95
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

SmartSeal Mid Grey Patio ColourSeal 5L
£69.95
4 out of 5 stars (2)
  • In stock for delivery
  • Click & Collect unavailable
MAPEI Mapeisil AC 999 Transparent Silicone Sealant 310ml
£18.00
  • In stock for delivery
  • Click & Collect unavailable
Zinsser Peel Stop Clear Paint Sealer 5L
£52.00
  • In stock for delivery
  • Click & Collect unavailable
New
Hemway Premium All-in-One Anthracite Grey Sealant and Adhesive 300ml
£12.00
  • In stock for delivery
  • Click & Collect unavailable
SmartSeal Silk Imprinted Concrete Sealer 5L 4 Pack
£140.00
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

SmartSeal Dark Grey Block Magic 25L
£184.95
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

Azpects EASYPrime Natural Stone and Porcelain Paving Primer Tub15kg
£40.00
  • In stock for delivery
  • Click & Collect unavailable
New
Polyvine Natural Stone and Brick Protector 1L
£30.00
  • In stock for delivery
  • Click & Collect unavailable
StoneCare4U Essential Brick Waterproofer 5L 3 Pack
£221.95
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

SmartSeal Sealer Repair Fluid 5L 2 Pack
£70.00
  • In stock for delivery
  • Click & Collect unavailable
SmartSeal White Masonry Protection Cream 15L
£269.95
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

StoneCare4U Essential Matt Finish Slate Sealer 5L 3 Pack
£124.00
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

StoneCare4U Essential Colour Boost Sandstone Sealer 5L
£64.95
  • In stock for delivery
  • Click & Collect unavailable
StoneCare4U Essential Satin Finish All Stone Sealer 5L 3 Pack
£136.00
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

StoneCare4U Essential Brick Acid Cleaner 5L 2 Pack
£65.95
  • In stock for delivery
  • Click & Collect unavailable
StoneCare4U Essential Satin Finish Block Paving Sealer 25L
£116.00
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

StoneCare4U Essential Matt Finish Sandstone Sealer 5L 3 Pack
£124.00
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

StoneCare4U Essential Deck Cleaner 5L 3 Pack
£79.00
  • In stock for delivery
  • Click & Collect unavailable
StoneCare4U Essential Gold Colour Boost Stone Sealer 1L
£28.95
  • In stock for delivery
  • Click & Collect unavailable
StoneCare4U Essential Brick Acid Cleaner 25L
£93.99
  • In stock for delivery
  • Click & Collect unavailable
New
Hemway Premium All-in-One Jet Black Sealant and Adhesive 300ml
£12.00
  • In stock for delivery
  • Click & Collect unavailable
StoneCare4U Essential Colour Boost Limestone Sealer 5L 2 Pack
£108.00
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

SmartSeal Porcelain Tile Sealer 1L
£29.00
  • In stock for delivery
  • Click & Collect unavailable
SmartSeal Red Patio ColourSeal 5L 3 Pack
£179.95
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

SmartSeal Xtreme Roof Cleaner 5L 3 Pack
£76.95
  • In stock for delivery
  • Click & Collect unavailable
SmartSeal Xtreme Roof Cleaner 25L
£109.95
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

SmartSeal Brick Sealer 5L
£38.50
  • In stock for delivery
  • Click & Collect unavailable
StoneCare4U Essential Matt Finish Slate Sealer 5L
£54.95
  • In stock for delivery
  • Click & Collect unavailable
SmartSeal Red Patio ColourSeal 5L 2 Pack
£129.95
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

StoneCare4U Essential Colour Boost Limestone Sealer 25L
£194.00
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

Soudal Seal It No White Mould Silicone Sealant
£5.59
  • In stock for delivery
  • Click & Collect available
SmartSeal Black Block Magic 5L
£59.95
  • In stock for delivery
  • Click & Collect unavailable
MAPEI Mapeisil AC 149 Volcano Sand Silicone Sealant 310ml
£18.00
  • In stock for delivery
  • Click & Collect unavailable
StoneCare4U Essential Satin Finish Slate Sealer 5L 3 Pack
£139.00
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

SmartSeal Colour Enhancer Natural Stone Sealer 1L
£28.50
  • In stock for delivery
  • Click & Collect unavailable
StoneCare4U Essential Satin Finish All Stone Sealer 25L
£194.00
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

New
Hemway Premium All-in-One Jet Black Sealant and Adhesive 300ml 3 Pack
£21.00
  • In stock for delivery
  • Click & Collect unavailable
SmartSeal Silk Imprinted Concrete Sealer 5L 2 Pack
£84.00
  • In stock for delivery
  • Click & Collect unavailable
StoneCare4U Essential Colour Boost Sandstone Sealer 5L 2 Pack
£109.00
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

Unibond General Purpose Silicone Sealant
£6.99
  • In stock for delivery
  • Click & Collect unavailable
SmartSeal Colour Enhancer Natural Stone Sealer 5L
£77.00
  • In stock for delivery
  • Click & Collect unavailable
SmartSeal External Concrete Sealer 5L 4 Pack
£144.00
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

MAPEI Mapeisil AC 131 Vanilla Silicone Sealant 310ml
£18.00
  • In stock for delivery
  • Click & Collect unavailable
StoneCare4U Essential Efflorescence and Salts Acid Remover 5L 2 Pack
£67.00
  • In stock for delivery
  • Click & Collect unavailable
StoneCare4U Essential Matt Finish Limestone Sealer 5L 2 Pack
£94.95
  • In stock for delivery
  • Click & Collect unavailable
SmartSeal Climashield Mahogany Roof Coating 20L
£129.95
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

SmartSeal Brick Sealer 25L
£124.95
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

SmartSeal Patio ColourSeal Black 5L 2 Pack
£129.95
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

StoneCare4U Essential Roof Cleaner 25L
£93.99
  • In stock for delivery
  • Click & Collect unavailable
SmartSeal Silk Block Paving Sealer 25L
£159.00
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

Soudal Multi Purpose Grey Silicone Sealant
£6.89
  • In stock for delivery
  • Click & Collect available
SmartSeal Black Block Magic 5L 3 Pack
£144.95
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

SmartSeal Eco Friendly Block Paving Sealer 5L 2 Pack
£67.00
  • In stock for delivery
  • Click & Collect unavailable
New
Hemway Premium 4-Piece Yellow Sealant Profiling Tool Kit
£10.00
  • In stock for delivery
  • Click & Collect unavailable
SmartSeal Concrete Floor Sealer 25L
£129.95
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

Unibond General Purpose Sealant
£6.99
  • In stock for delivery
  • Click & Collect unavailable
StoneCare4U Essential Colour Boost Slate Sealer 5L 3 Pack
£149.00
  • In stock for delivery
  • Click & Collect unavailable

Free Home Delivery

New
Hemway Premium All-in-One Anthracite Grey Sealant and Adhesive 300ml 9 Pack
£54.00
  • In stock for delivery
  • Click & Collect unavailable

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