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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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    Soudal Silirub N Brilliant White UK 300ml (118985)

    General purpose, low modulus, neutral cure silicone sealant.Very fast skinning time and final cure. Excellent toolability. Primerless adhesion on most common construction materials. Resistant to UV,...
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    Soudal Soudabond Easy Gun Grade Foam Orange 750ml (161094)

    Soudabond Easy is a high performance polyurethane adhesive foam that is both quick and easy to use, as it requires no mixing. The formula combines strong adhesion with filling characteristics, making...
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    Soudal Stay Fresh Acetoxy Anti-Mould Silicone Clear 290ml (152988)

    The ultimate anti-mould sealant by Soudal is a neutral cure silicone. Contains powerful anti-fungicidal agents. Very fast skinning time and final cure. Thick-bodied. Primerless adhesion on all...
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    Soudal Stay Fresh Acetoxy Anti-Mould Silicone Ice White 290ml (152987)

    The ultimate anti-mould sealant by Soudal is a neutral cure silicone. Contains powerful anti-fungicidal agents. Very fast skinning time and final cure. Thick-bodied. Primerless adhesion on all...
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    Soudal Stay Fresh Anti-Mould Silicone Clear Twin Pack

    Soudal Stay Fresh is a high-quality, neutral, elastic one-component silicone based joint sealant. Primerless adhesion on all sanitary materials, including plastics. Highly elastic. Resistant to UV,...
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    Soudal Stay Fresh Anti-Mould Silicone Ice White Twin Pack

    Soudal Stay Fresh is a high-quality, neutral, elastic one-component silicone based joint sealant. Primerless adhesion on all sanitary materials, including plastics. Highly elastic. Resistant to UV,...
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    Thompsons One Coat Water Seal 1 Litres

    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.
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    Thompsons One Coat Water Seal 2.5 Litres

    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.

  • Wykamol DrySeal Masonry Protection Cream 3 Litre

    Dryseal is a water repelling, salt inhibiting masonry protection cream which is deeply penetrating and can be used on all types of masonry. DrySeal is a unique, thixotropic, water-repelling masonry...

  • Wykamol Enviroseal 25 Litre

    Enviroseal is primarily used to prevent water penetration in buildings through the exterior structure, but can be applied to a multitude of substrates. Surfaces treated with Enviroseal remain vapour...

  • Wykamol ISO-THERM Adhesive Bond 15kg

    A new and innovative patented textile-based thermal wall insulation (ultra-thin), for dry and warm walls. Designed to save energy and keep walls dry. ISO-THERM is an ultra-thin (+/-4mm) specially...

  • Wykamol ISO-THERM Thin Internal Wall Insulation 950mm x 7m (7.125M2)

    A new and innovative patented textile-based thermal wall insulation (ultra-thin), for dry and warm walls. Designed to save energy and keep walls dry. ISO-THERM is an ultra-thin (+/-4mm) specially...
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    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.
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    EGGER Joint & Joist D4 Adhesive 1kg

    EGGER Joint & Joist Adhesive is a methylene diphenyl isocyanae (MDI) based adhesive which is manufactured to BS EN 204 Class D4. EGGER Joint & Joist Adhesive is designed for use in bonding board...
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    Everbuild 502 All Purpose Weatherproof Wood Adhesive 500ml

    502 All Purpose Weatherproof Wood Adhesive is a high quality, resin-based wood adhesive for all wood bonding applications.

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.