null

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.

Filters

Check local branch stock

  • Everbuild%20Aluminium%20Tape.jpg.jpeg

    Everbuild Aluminium Tape 50mm 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...
  • Top%20Gun%20All%20Purpose%20Black%20Silicone%20Sealant.jpg.jpeg

    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.
  • Trade-Mate-White-Sanitary-Seal.jpg.jpeg

    Geocel Trade Mate Sanitary Sealant White 310ml

    Geocel Trade Mate Sanitary Seal is a fast curing silicone sealant, ideal for sealing around sanitary units and non-porous surfaces. It provides excellent unprimed adhesion to a variety of substrates including ceramics, plastics and enamel.
  • 125786.jpg.jpeg

    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 dried. Can be used for internal and external...
  • 135215.jpg.jpeg

    Soudal Genius Gun B1 Fire & Acoustic Expanding Foam Blue 600ml (135215)

    Genius Gun Fire Rated one component, expanding polyurethane foam filler. Rapid curing. Excellent thermal and acoustic insulation properties. Excellent primerless adhesion on most construction materials. Genius Gun is a patented trigger mechanism,...
  • BOSTIK%20PRO%20SEALANTS%20-%20S21%20SILICONE%20310ML%2030623036%2C%2030623039%2C%2030623041%2C%2030623054%2C%2030623110.png

    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...
  • BOSTIK%20PRO%20SEALANTS%20-%20S30%20SILICONE%20310ML%2030623035%2C%2030623038%2C%2030623293.png

    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...
  • BOSTIK%20PRO%20SEALANTS%20-%20S31%20SILICONE%20310ML%2030623019%2C%2030623018%2C%2030623017.png

    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...
  • Hippo%20Heavy%20Duty%20Duct%20Tape.jpg.jpeg

    Hippo Heavy Duty Duct Tape Silver/Black 50m x 50mm (3 Pack) (H18204)

    A heavy duty duct tape by Hippo, features a special impregnated cloth weave for excellent tensile strength and good long term durability. Its versatile, waterproof and adheres firmly to most surfaces, whilst remaining easy to tear by hand. Sometimes...
  • Ronseal%20Multi%20Purpose%20Wood%20Filler.jpg.jpeg

    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.
  • 144382.jpg.jpeg

    Soudal Bathroom & Kitchen Sanitary Silicone White 290ml (144382)

    Low modulus sanitary silicone by Soudal that contains a powerful anti-fungicidal agent. This silicone has a very fast skinning time and final cure, as well as being resistant to UV, rain and snow. Due to its nature it also features a temperature...
  • 137930.jpg.jpeg

    Soudal Polyurethane 4 Way Flow Control Foam Gun Red/Black (137930)

    Professional grade polyurethane foam applicator gun for use with gun grade PU Foams and cleaners. Fit the foam can tightly onto the spray gun. Adjust the setscrew and spray the foam by pulling the trigger. When temporarily not using the spray gun, close...
  • 351151-LAB_750ml%20Soudabond%20Easy%20GG%20Australia.png

    Soudal Soudabond Easy Genius Gun Foam Adhesive 750ml (130426)

    Soudabond EASY is a high performance polyurethane adhesive foam. Quick and easy to use - no mixing required. Replaces traditional powder based adhesives. The formula combines strong adhesion with filling characteristics, making it suitable for bonding...
  • 161117.jpg.jpeg

    Soudal Soudabond Handheld Easy Foam Adhesive 750ml (161117)

    Soudabond EASY is a high performance polyurethane adhesive foam. Quick and easy to use - no mixing required. Replaces traditional powder based adhesives. The formula combines strong adhesion with filling characteristics, making it suitable for bonding...
  • 121656.jpg.jpeg

    Soudal Trade Roof & Gutter Sealant Black 290ml (121656)

    Plasto-elastic bitumen based sealant for roof and guttering applications and for sealing of bituminous surfaces. Permanent weatherproofing of roofing applications that include sealing of guttering, downpipes, chimneystacks, lap joints, attic windows,...
  • Patination%20Oil.jpg.jpeg

    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...
  • BOSTIK%20PRO%20SEALANTS%20-%20P26%20POLYMER%20290ML%2030623015%2C%2030623176.png

    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...
  • CTEC_DModel_CT1_MiB%26Colour_v2_020321_NUP_White.png

    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...
  • STIXWE%20-%20PCR.jpg.jpeg

    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...
  • EVO-STIK%20Mitre%20Adhesive%2050g%2030618788.jpg.jpeg

    Evo-Stik Rapid Mitre Fix Adhesive Aerosol Large 50g / 200ml (30618788)

    EVO-STIK Mitre Adhesive kit is an easy-to-use, 2-part adhesive consisting of a 50g mitre glue and activator. It is designed primarily for instantly bonding the mitre joints of picture frames; however it will also bond many other surfaces. WIth a higher...
  • Ronseal%20550g%20Natural%20High%20Performance%20Wood%20Filler.jpg.jpeg

    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...
  • 135233.jpg.jpeg

    Soudal Genius Gun B2 Fire & Acoustic Expanding Foam Champagne 600ml (135233)

    Genius Gun Fire Rated one component, expanding polyurethane foam filler. Rapid curing. Excellent thermal and acoustic insulation properties. Excellent primerless adhesion on most construction materials. Genius Gun is a patented trigger mechanism,...
  • Thompsons%205ltr%20One%20Coat%20Water%20Seal.jpg.jpeg

    Thompsons One Coat Water Seal 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.
  • Thompsons%20750ml%20Stain%20Blocking%20Damp%20Seal.jpg.jpeg

    Thompsons Stain Blocking Damp Seal 750ml

    Thompson's Stain Block Damp Seal covers stains caused by leaking pipes and spills. It also seals damp patches prior to decorating.

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.