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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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    Everbuild Aluminium Tape 50mm x 45m

    Everbuild aluminium foil tape measuring 50mm x 45m for sealing insulation and ducting. Buy online today.
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    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.
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    Soudal Express Cement Repair Grey 290ml (125786)

    Soudal Express Cement Repair in grey supplied in a 290ml cartridge for fast concrete and masonry repairs. Buy online today.
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    Soudal Genius Gun B1 Fire & Acoustic Expanding Foam Blue 600ml (135215)

    Soudal B1 fire and acoustic expanding foam in a 600ml can for fire rated sealing applications. Buy online today.
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    Bostik Pro Sealant S21 Multi Purpose Silicone Clear 310ml

    This Bostik S21 310ml multi purpose Silicone Sealant is a clear coloured professional grade, acetoxy silicone sealant for sealing glazing, frame and sanitary joints. This low modulus silicone sealant is suitable for interior and exterior use and offers...
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    Bostik Pro Sealant S30 Acetoxy Sanitary Silicone Clear 310ml

    Professional grade acetoxy silicone sealant for sanitary joints. S30 is a professional grade acetoxy sanitary silicone sealant developed for sealing sanitary joints. Sanitary joints are continually exposed to moisture and humidity. This acetoxy silicone...
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    Bostik Pro Sealant S31 Sanitary Silicone Clear 310ml

    The Bostik S31 Neutral Cure Sanitary Silicone Sealant is a professional grade, neutral cure silicone sealant developed for sealing sanitary joints that are continually exposed to moisture and humidity. S31 is a great sealant that adheres well with...
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    Everbuild One Strike Filler 1 Litre (461916)

    EVERBUILD ONE STRIKE is an unique ready-mixed lightweight filler that may be used to prepare a variety of surfaces for painting or wallpapering. The product, which is made up of high-strength lightweight polymeric fillers, outperforms traditional fillers...
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    Hippo Heavy Duty Duct Tape Silver/Black 50m x 50mm (3 Pack) (H18204)

    Hippo heavy duty silver and black duct tape measuring 50m x 50mm supplied in a three pack. Buy online today.
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    Luxigraze Green Polyurethane Adhesive (310ml)

    Luxigraze green polyurethane adhesive 310ml cartridge for fixing artificial grass. Buy online today.
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    Ronseal Multi Purpose Wood Filler Natural 465g

    Ronseal Multi-Purpose Wood Filler (465g) in a Natural colour finish can be used on any small wood repairs inside and outside. It's flexible so it won't crack and it leaves a tough repair.
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    Soudal Bathroom & Kitchen Sanitary Silicone White 290ml (144382)

    Soudal sanitary silicone in white for sealing bathrooms, kitchens and wet areas. Buy online today.
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    Soudal Genius Gun B2 Fire & Acoustic Expanding Foam Champagne 600ml (135233)

    Soudal Genius Gun B2 fire and acoustic expanding foam in a 600ml can for sealing and insulating gaps. Buy online today.
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    Soudal Polyurethane 4 Way Flow Control Foam Gun Red/Black (137930)

    Soudal polyurethane foam gun with four way flow control for precise foam application. Buy online today.
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    Soudal Soudabond Easy Genius Gun Foam Adhesive 750ml (130426)

    Soudal Soudabond Easy Genius Gun foam adhesive in a 750ml can for insulation board installation. Buy online today.
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    Soudal Soudabond Handheld Easy Foam Adhesive 750ml (161117)

    Soudal Soudabond handheld foam adhesive in a 750ml can for fixing insulation boards and panels. Buy online today.
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    Soudal Trade Roof & Gutter Sealant Black 290ml (121656)

    Soudal trade roof and gutter sealant in black for waterproof repairs and sealing. Buy online today.
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    Walther Strong Heavy Duty Orange Scrim Tape 90m x 100mm (TP-ORNSCRIM100X90PR)

    Walther heavy duty orange scrim tape measuring 90m x 100mm for plasterboard joint reinforcement. Buy online today.
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    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...
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    Bostik Pro Sealant P26 Weatherproof MS Polymer White 290ml (30623015)

    This sealant by Bostik is a professional grade white polymer sealant for weatherproofing exterior joints subject to high movement. The high modulus formulation has a movement capability of up to 25% and provides excellent adhesion to a wide range of...
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    Everbuild Stixall Crystall Clear 290ml (STIXCLEAR)

    Everbuild Stixall Extreme Power is the ultimate combined building adhesive and sealant, based on hybrid polymer technology, with the most Extreme power to both bond and seal virtually EVERYTHING to ANYTHING in nearly all conditions, even under water or...
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    Evo-Stik Rapid Mitre Fix Adhesive Aerosol Large 50g / 200ml (30618788)

    Evo Stik Rapid Mitre Fix adhesive and aerosol activator for fast bonding of mitre joints. Buy online today.
  • Ronseal%20550g%20Natural%20High%20Performance%20Wood%20Filler.jpg.jpeg

    Ronseal High Performance Wood Filler Natural 1kg

    Ronseal high performance natural wood filler in a 1kg pack for durable wood repairs. Buy online today.
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    Ronseal High Performance Wood Filler Natural 275g

    This Wood Filler is a high performing and incredibly tough product that repairs most types of wood damage. It is suitable for use on various parts of doors and windows, including sills and frames. The product can cure wet rot, preventing it from...

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.