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Chimney pots, manhole covers, plasterers scrim and more

Current special offers on a number of building supplies

Free delivery for orders over £60 on selected products. (excludes bulky, heavy and fragile items)

  • Next day delivery
  • Saturday delivery
  • AM delivery

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Sealants are constantly in use in the building industry to close or seal small openings that are difficult to shut with other materials, such as tiles, baths, sinks, concrete, drywall, etc. See our range of high quality sealants to find one suitable for your project.

We have a great selection of sealants to choose from, from kitchen sealant with anti-fungal properties to industrial strength construction sealant.

We also sell high quality building mastic which is perfect for creating a weatherproof seal around your property, see our sealant gun products for the best way to apply the sealant of mastic!

Sealants are generally defined by their end use: 

  • Frame Sealants : For creating a waterproof seal for door and window frames, Interior and exterior use.
  • Glazing & Roofing Sealants : For Glazing, Roofing and PVCu uses.
  • Kitchen & Bathroom Sealants : Wide range of sealants including Sanitary Silicone Sealants
  • Multi-Purpose Sealants : These sealants are suitable for a wide range of uses and suitable for many different substrates. 
  • Specialists Sealants : Including Acoustic, Mirror, Flue Block and FireMate sealants.
  • Sealant & Skeleton Guns : A Range of Mastic & Sealant guns.
  • Sealant Tools & Cleaner : Sealant stripping & cleaning and smoothing tools. 
  • Decorative Fillers and Expanding Fillers in some cases are also suitable for sealing as well as well as their primary function of filling.

More Technical information:

The main difference between adhesives and sealants is that sealants typically have lower strength and higher elongation than do adhesives. Since the main objective of a sealant is to seal assemblies and joints, sealants need to have sufficient adhesion to the substrates and resistance to environmental conditions to remain bonded over the required life of the assembly.

When sealants are used between substrates having different thermal coefficients of expansion or differing elongation under stress, they need to have adequate flexibility and elongation. Sealants generally contain inert filler material and are usually formulated with an elastomer to give the required flexibility and elongation. They usually have a paste consistency to allow filling of gaps between substrates. Low shrinkage after application is often required. Many adhesive technologies can be formulated into sealants.

Sealants fall between higher-strength adhesives at one end and extremely low-strength putties and caulks at the other. Putties and caulks serve only one function i.e., to take up space and fill voids. Sealants, on the other hand, despite not having great strength, do convey a number of properties. They seal the substrate at the glue line; they are particularly effective in keeping moisture in or out of the components in which they are used. They provide thermal and acoustical insulation and may serve as fire barriers; sometimes they contain electrical properties. They may also be used for smoothing or filleting. In short, sealants are often called upon to perform several of these functions at once.

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