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Sealants & Adhesives

Sealants and adhesives are essential for bonding, sealing, and protecting materials in construction and DIY projects. Whether you’re fixing, filling gaps, or creating waterproof seals, our range includes high-performance products suitable for a wide range of applications.

From grab adhesives for strong instant bonding to silicone sealants for flexible waterproof finishes, we supply reliable solutions for both trade professionals and home users.

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    Evo-Stik Sticks Like C20 All Weather Ms Polymer Adhesive Clear

    EVO-STIK Sticks Like Adhesive is a superior strength, all weather adhesive. Suitable for use on a wide range of building materials. It can resist extreme temperatures and movement and will even stick to wet surfaces. For interior and exterior use.
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    Evo-Stik Sticks Like C20 All Weather Ms Polymer Adhesive White

    EVO-STIK Sticks Like Adhesive is a superior strength, all weather adhesive. Suitable for use on a wide range of building materials. It can resist extreme temperatures and movement and will even stick to wet surfaces. For interior and exterior use.
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    Bostik Pro Sealant A80 Acrylic Decorators Caulk White 310ml

    The Bostik A80 is a professional grade White Acrylic Decorators Caulk, that is ideal for filling gaps and cracks prior to painting. The acrylic caulk provides a smooth finish and is instantly paintable, meaning no waiting around on projects. Suitable for...
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    Everbuild PinkGrip SF 'But It's White' C4 380ml PINKWE

    Pinkgrip SF But It's White is a solvent free, white version of the brand leading Pinkgrip Direct Bond Adhesive. It has all the unique benefits of Pinkgrip and will stick just about anything on a building site without the need for under pinning, thanks to...
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    Geocel Contractor Gun Foam 750ml

    Geocel Contractor Gun Foam is a polyurethane foam suitable for gap filling around window & door frames.
  • Special Offer
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    Special Offer

    Azpects EasyScape Gravel Hold 5 Litre (6600)

    Azpects EasyScape Gravel Hold helps stabilise decorative gravel for paths, borders and landscaping projects. Buy online with delivery or Click & Collect today.
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    Soudal Lead Sheet Sealant Grey 290ml (116726)

    Soudal grey lead sheet sealant in a 290ml cartridge for roofing and flashing applications. Buy online today.
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    Dupont Insta-Stik Straw Applied Multi Purpose Adhesive 750ml

    A more practical solution than bagged dry wall adhesive, this handheld can of Insta-Stik Adhesive applies using a gun and cures in just 3-5 minutes. It doesn't require any preparation and is suitable for bonding insulation board and plasterboard as well...
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    Everbuild Euroscrim Scrim Tape 48mm x 90m (484687)

    Euroscrim is a premium quality scrim tape that is made in Europe. It is quick and easy to apply, with it being self-adhesive. It's flexible and won't cause bubbles or blisters and can be used for drywall, plaster walls and coatings.
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    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.
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    Soudal Multi-Purpose Silicone Brown 270ml (116713)

    Soudal multi purpose brown silicone sealant in a 270ml cartridge for internal and external use. Buy online today.
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    Dupont Insta-Stik Gun Applied Multi Purpose Adhesive 750ml

    Dupont Insta Stik is a polyurethane foam adhesive which can be used to fix plasterboard, insulation board and most common building substrates quickly and easily. There are no tools or mixing required and no bags of heavy dry wall adhesive.
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    Bostik Pro Sealant PU91 Construction Polyurethane Grey 300ml (30623104)

    PU91 by Bostik is a professional grade construction polyurethane sealant developed for sealing construction joints subject to high movement. This grey PU sealant has a high modulus formulation and is extremely elastic with up to 25% movement capability...
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    Bostik Pro Sealant S41 Window & Door Frame Silicone Brown 310ml

    A brown S41 Neutral Cure Window & Door Frame Silicone by Bostik, is a professional grade neutral cure silicone sealant, developed for sealing window and door frame joints. This silicone sealant is also available in either Anthracite or Clear, so it fits...
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    C-Tec CT1 Sealant & Adhesive Clear 290ml (539506)

    C Tec CT1 clear sealant and adhesive in a 290ml cartridge for strong bonding and sealing. Buy online today.
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    Everbuild Aluminium Tape 75mm x 45m

    Mammoth Aluminium Tape is a silver heat and light reflective aluminium foil tape. It is heat resistant up to 180C, flame retardant to Class O, and has excellent moisture resistance. This tape is ideal for use as a vapour barrier between foil-faced...
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    Everbuild Fine Surface Ready Mixed Filler 600g

    Fine Surface Filler is an easy to use ready mixed filler for filling small holes and surface imperfections in most porous surfaces such as plaster and wood. Dries to a very smooth finish that can be painted or papered.
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    Soudal Repair Express Plaster White 900ml (152306)

    Soudal Repair Express plaster repair compound in white supplied in a 900ml tub. Buy online today.
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    Bostik Feltfix Bituminous Felt Roof Adhesive Black 5 Litre (30811935)

    Feltfix is a Bituminous Roof Felt Adhesive by Bostik, is a cold applied solvent-based bituminous waterproofing adhesive. It has high initial grab for bonding bituminous roofing felts to asphalt, felt, metal, timber and concrete. It is also suitable for...
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    Soudal Bathroom & Kitchen Sanitary Silicone Clear 290ml (144383)

    Soudal sanitary silicone in clear for waterproof sealing in bathrooms and kitchens. Buy online today.
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    Soudal Genius Gun Gap Filler Expanding Foam Champagne 600ml (135234)

    Soudal Genius Gun expanding gap filler foam in a 600ml can for sealing and insulating gaps. Buy online today.
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    Soudal Multi-Purpose Silicone Brilliant White 270ml (121643)

    Soudal multi purpose white silicone sealant in a 270ml cartridge for sealing around the home. Buy online today.
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    Bostik Pro Sealant S41 Window & Door Frame Silicone White 310ml

    This silicone sealant by Bostik is the S41 Neutral cure window & door frame silicone, a professional grade neutral cure silicone sealant, developed for sealing window and door frame joints. This sealant is suitable for interior and exterior...
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    CT1 Construction Sealant & Adhesive White 290ml (535206)

    CT1 is the only product in the market with TRIBRID Technology, making it 360% stronger than a traditional Hybrid Polymer. If you're looking for a clean, sealant, look no further than CT1 White. This pristine construction sealant creates highly durable...

Sealants & Adhesives

Grab adhesives

Ideal for strong, instant bonding without the need for nails or screws:

Perfect for flexible, waterproof sealing:

  • Bathroom sealants
  • Exterior silicone
  • Weatherproof sealants
  • Expanding foam

Used for filling gaps and insulation:

Specialist adhesives & sealants

Designed for specific materials and applications:

  • Wood adhesives
  • Masonry sealants
  • High-temperature sealants

Choosing the right sealant or adhesive

When selecting sealants and adhesives, consider:

  • Application – bonding, sealing, or gap filling
  • Environment – interior or exterior use
  • Water resistance – essential for bathrooms and outdoor areas
  • Material compatibility – wood, metal, masonry, or plastic

Complete your project

You may also need:

If you are working on a new project or renovating an existing outdoor space, pop into your local Howarth branch or browse our website. We also offer Click & Collect and Delivery options.

Shop Sealants & Adhesives by Type

Frequently Asked Questions

How to use silicone sealant?
To use silicone sealant, prepare the area that needs to be sealed, apply the sealant, smooth the sealant, and then leave it to dry.
How much tile adhesive do I need?
You will need 1.8kgs per 1mm depth per m2.
How to mix grout?
To mix grout, add water to the grouting powder in the manufacturer-recommend ratio. Tilt mixing bucket and stir with a grout-mixing knife. Then, adjust grout consistency by adding more powder or water. Let the grout rest for up to 10 minutes before using a grout knife to mix thoroughly once more.
How to use wood filler on a door frame?
To use wood filler on a door frame, start off by scraping out any flaking and splinters of paint from the damaged parts by using a wire brush. Then, it is important to soften or mix the filler as per instructions. It could involve stirring to the point of hardening, kneading until it softens, or mixing different substances until you get a similar colour. At this point, apply the ready filler on a putty knife. You will then scrape it onto the frame’s damaged area. After you’ve done that, allow a reasonable time for the filler to dry.
How to use expanding foam?
To use expanding foam, first clean the area, removing any debris and dirt to ensure there will be no contaminants. Put on disposable gloves to ensure you stay as safe as possible (as expanding foam can burn and will stick to your skin if it gets on you), prepare the can by removing the top and screwing in the applicator nozzle onto the valve, making sure not to use too much. Then, finally, shake the can well and then insert the nozzle into the hole you wish to fill, holding the can upside down for the best application. Make sure to leave the foam to set, which will take between 30 minutes and 12 hours depending on the amount of foam you’ve used. Once the foam has dried, you can cut and sand it down to the desired fit.
What is grab adhesive used for?
Grab adhesive is used for bonding materials quickly without the need for screws or nails.
What sealant is best for waterproofing?
Silicone sealants are commonly used for waterproofing due to their flexibility and resistance to moisture.
Can sealants be used outdoors?
Yes, exterior sealants are designed to withstand weather conditions and provide long-lasting protection.