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Sealants

Sealants are used to stop fluids and other substances from passing through joints or openings. Various types available including all purpose, roofers seal, fire and heat, building, glazing and more.

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  • ALM Oil Patination 500ml

    ALM Oil Patination 500ml

    Premium Patination Oil is an alkyd resin-based liquid which, when applied to lead sheet, provides a permeable coating through which the metal surface will oxidise at a controlled rate. Over time this oxised layer develops into uniform dull grey adherent...
  • Dowsil 791 Weatherproofing Sealant Black 310ml Dowsil 791 Weatherproofing Sealant Black 310ml

    Dowsil 791 Weatherproofing Sealant Black 310ml

    This Dow Corning Weatherproofing Silicone is designed to protect areas from a variety of weather problems, including (not exclusive to) pollution, temperature extremes particularly during the summer and winter months and rain. The Silicone can be used...
  • Dowsil 791 Weatherproofing Sealant White 310ml Dowsil 791 Weatherproofing Sealant White 310ml

    Dowsil 791 Weatherproofing Sealant White 310ml

    Suitable for use with the majority of construction materials, including brick, timber and glass, this Weatherproofing Silicone is designed to protect a building from extreme hot and cold temperatures, pollution, UV rays etc. The Silicone cures incredibly...
  • Geocel Trade Mate Frame Seal Clear 310ml

    Geocel Trade Mate Frame Seal Clear 310ml

    Geocel Trade Mate Frame Seal is a low modulus neutral silicone sealant for external sealing around door and window frames including PVC-U, coated aluminium & painted surfaces.
  • Geocel Contractors Caulk White 380ml

    Geocel Contractors Caulk White 380ml

    Geocel Contractors Decorators Caulk is a one part, easy to apply flexible acrylic filler which is ideal for sealing gaps and cracks prior to decorating. It has been specifically developed for the painting and decorating contractor where large volume...
  • Geocel Trade Mate Sanitary Sealant White 310ml

    Geocel Trade Mate Sanitary Sealant White 310ml

    Geocel Trade Mate Sanitary Seal is a fast curing silicone sealant, ideal for sealing around sanitary units and non-porous surfaces. It provides excellent unprimed adhesion to a variety of substrates including ceramics, plastics and enamel.
  • Geocel Trade Mate Sanitary Sealant Clear 310ml

    Geocel Trade Mate Sanitary Sealant Clear 310ml

    Geocel Trade Mate Sanitary Seal is a fast curing silicone sealant, ideal for sealing around sanitary units and non-porous surfaces. It provides excellent unprimed adhesion to a variety of substrates including ceramics, plastics and enamel.
  • Geocel Trade Mate Frame Seal Brown 310ml

    Geocel Trade Mate Frame Seal Brown 310ml

    Geocel Trade Mate Frame Seal is a low modulus neutral silicone sealant for external sealing around door and window frames including PVC-U, coated aluminium & painted surfaces.
  • Geocel Trade Mate Lead & Gutter Seal Grey 310ml

    Geocel Trade Mate Lead & Gutter Seal Grey 310ml

    Geocel Trade Mate Lead & Gutter Seal is a silicone rubber sealant for the installation and maintenance of gutter systems and downpipes, and pointing joints between lead flashing and brickwork, stone or masonry.
  • Dowsil Corning 785+ Sanitary Silicone Sealant Clear 310ml

    Dowsil Corning 785+ Sanitary Silicone Sealant Clear 310ml

    Resistant against bacteria including E. Coli, MRSA and Salmonella, this Sanitary Silicone Sealant is suitable for use in areas where hygiene is important. It also offers excellent adhesive properties allowing it to be used on most types of non-porous...
  • Dowsil Corning 785+ Sanitary Silicone Sealant White 310ml

    Dowsil Corning 785+ Sanitary Silicone Sealant White 310ml

    This Sanitary Silicone Sealant from Geocel offers excellent adhesion to non-porous surfaces and is designed to seal areas around sanitary fittings such as toilets, urinals, sinks, baths, showers etc. The sealant is resilient against most types of...
  • Geocel Top Gun Multi-Purpose Sealant White 290ml

    Geocel Top Gun Multi-Purpose Sealant White 290ml

    Geocel Top Gun Multi Purpose Silicone Sealant can be used for a variety of internal and external applications. It has excellent adhesion, gives a watertight seal and remains permanantly flexible.
  • Geocel Top Gun Multi-Purpose Clear 290ml

    Geocel Top Gun Multi-Purpose Clear 290ml

    Geocel Top Gun Multi Purpose Silicone Sealant can be used for a variety of internal and external applications. It has excellent adhesion, gives a watertight seal and remains permanantly flexible.
  • Geocel Top Gun Multi-Purpose Sealant Brown 290ml

    Geocel Top Gun Multi-Purpose Sealant Brown 290ml

    Geocel Top Gun Multi Purpose Silicone Sealant can be used for a variety of internal and external applications. It has excellent adhesion, gives a watertight seal and remains permanantly flexible.
  • Geocel Top Gun Multi-Purpose Sealant Black 290ml

    Geocel Top Gun Multi-Purpose Sealant Black 290ml

    Geocel Top Gun Multi Purpose Silicone Sealant can be used for a variety of internal and external applications. It has excellent adhesion, gives a watertight seal and remains permanantly flexible.
  • Geocel Trade Mate Roofers Seal Black 310ml

    Geocel Trade Mate Roofers Seal Black 310ml

    Geocel Trade Mate Roofers Seal is a single component, high performance elastomeric sealant and can be used for most roofing applications and repairs. It will adhere to various roofing substrates including, lead, bitumen and galvanised steel. It is ideal...
  • Geocel Trade Mate Roofers Seal Grey 310ml

    Geocel Trade Mate Roofers Seal Grey 310ml

    Geocel Trade Mate Roofers Seal is a single component, high performance elastomeric sealant and can be used for most roofing applications and repairs. It will adhere to various roofing substrates including, lead, bitumen and galvanised steel. It is ideal...
  • Thompsons Stain Blocking Damp Seal 750ml

    Thompsons Stain Blocking Damp Seal 750ml

    Thompson's Stain Block Damp Seal covers stains caused by leaking pipes and spills. It also seals damp patches prior to decorating.
  • Thompsons One Coat Patio & Block Paving Seal

    Thompsons One Coat Patio & Block Paving Seal

    Thompsons One Coat Patio & Block Paving Seal (5 litre) is all you need to fully protect your block paving and flag stones, prolonging longevity, whilst helping your path or driveway to remain resistant against stains caused by oils, such as petrol. Once...
  • Thompsons Water Seal 5 Litres

    Thompsons Water Seal 5 Litres

    Thompson's Water Seal (5 litre) uses a unique micro silicone emulsion to stop water penetration. Apply directly onto damp surfaces to provide long-lasting waterproof protection within hours.
  • Wykamol Enviroseal 5 Litre

    Wykamol Enviroseal 5 Litre

    Wykamol Enviroseal is a highly penetrative product that is suitable for a wide range of materials that are used above ground including porous brick, tiles (unglazed), leather, cement, and wood. Effective once dry, Enviroseal helps to get rid of...
  • Thompsons One Coat Water Seal

    Thompsons One Coat Water Seal

    £15.17 - £21.89 (Ex VAT)
    £18.20 - £26.27 (Inc VAT)
    Thompson's One Coat Water Seal uses a unique micro silicone emulsion to stop water penetration. Apply directly onto damp surfaces to provide long lasting waterproof protection within hours.

Sealants

Sealants are used when you are looking to create a waterproof or airproof seal. Also knows as silicone sealants or mastics, they can be used for both internal or external applications, minimising any passing of water or air into an area.

Applied using a sealant gun, the sealant fills any gaps to leave a smooth finish and when dried can be sanded or painted over.

If you're not sure which type of sealant you require, ask our friendly team at your local branch.

Frequently Asked Questions

Can you paint over silicone sealant?
Silicone sealant is a durable and long-lasting variety that seals and waterproofs. Its drawback is that paint will not stick to it. However, it is possible to paint over silicone caulk.
Can you put sealant on top of sealant?
We do not recommend putting new sealant on top of old sealant as it poses a risk of leakages.
What removes silicone sealant?
Sealant remover, a soft cloth, a razor or utility knife, and a scouring pad would help to remove your silicone sealant efficiently.
How to apply silicone sealant.
To apply silicone sealant, start by evaluating the project. Think about what you need to do, what you’d like the finished job to look like and what kind of tools and sealant you need. Once you’ve picked the right tools and you’ve got everything you need, you can start preparing the area. This means that you need to ensure that the area is free of dirt and grime, removing any leftover old sealant, and making sure that the entire area is clear ready for when you get started. Then, you can start applying the sealant, although, depending on the type of sealant you use, there are lots of different ways to apply it. You may need a sealant gun, or the sealant that comes in a tube so you can apply it directly. Once you’ve applied the sealant, smooth it out by using either your finger or a sealant smoothing tool, then make sure to leave it to dry for the time specified by the instructions.