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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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    Geocel Contractors Decorators 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...
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    Soudal Flexible Decorators Caulk Extra White Paintable 290ml (152989)

    Premium quality acrylic polymer based flexible sealant and filler. Solvent free and virtually odourless. Very easy to apply and can be easily painted or papered over once cured. Excellent adhesion on...
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    Soudal Decorators Caulk White 290ml (121638)

    An acrylic, solvent free dispersion that cures to form a durable, flexible seal. Can easily be painted or papered over when dry. For internal use for sealing gaps around internal window and door...
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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...
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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...
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    Soudal Repair Express Plaster White 900ml (152306)

    High speed acrylic polymer for lightweight plaster repair jobs. For an easy and quick reparation or filling in walls and ceiling such as cracks or screw holes then this product by Soudal could be the...
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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 Express Cement Repair Grey 290ml (125786)

    High speed acrylic polymer based, textured repair cement. For easy and quick reparation or filling of joints and cracks in concrete. Can be applied by trowel or gun. sandable and over-paintable once...
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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...
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    Ronseal High Performance Wood Filler Natural 1kg

    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...
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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...
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    Ronseal High Performance Wood Filler White 275g

    White in colour, this High-Performance Wood Filler is ideal for repairing white painted wooden items without the need to paint over. Suitable for doors and windows, as well as frames and window...
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    Everbuild 101 Multi-Purpose Brown Putty 1kg

    Everbuild Multi-Purpose Premium Joiners Grade Wood Filler is an easy to use joiners grade filler which is ideal for filling small imperfections in wood. Once dry, the filler leaves a sandable surface...
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    Everbuild All Purpose Powder Filler White (FILL15) 1.5KG

    All Purpose Powder Filler is for both internal and external use. This filler has added PVA power for extra strength and prevent shrinkage or cracks. Everbuild All Purpose Filler is suitable for...
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    Everbuild All Purpose Powder Filler White (FILL450) 450g

    All Purpose Powder Filler is for both internal and external use. This filler has added PVA power for extra strength and prevent shrinkage or cracks. Everbuild All Purpose Filler is suitable for...
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    Everflex Contract 125 One Hour Caulk White 125C3

    Everflex Contract 125 One Hour Caulk is a fast-drying flexible decorators filler and sealant that remains permanently flexible. Can be overpainted with most paint types or covered over with...
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    Ronseal High Performance Wood Filler Natural 550g

    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...
  • Ronseal High Performance Wood Filler White 1kg

    Ronseal High Performance Wood Filler White 1kg

    White in colour, this High-Performance Wood Filler is ideal for repairing white painted wooden items without the need to paint over. Suitable for doors and windows, as well as frames and window...
  • Ronseal%20550g%20White%20High%20Performance%20Wood%20Filler.jpg.jpeg

    Ronseal High Performance Wood Filler White 550g

    White in colour, this High-Performance Wood Filler is ideal for repairing white painted wooden items without the need to paint over. Suitable for doors and windows, as well as frames and window...
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    Soudal Express Cement Repair Beige 290ml (128000)

    High speed acrylic polymer based, textured repair cement. For easy and quick reparation or filling of joints and cracks in concrete. Can be applied by trowel or gun. sandable and over-paintable once...

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.