Gap Filler

Browse our wide range of Gap Fillers, perfect for sealing cracks, joints, and gaps in walls, ceilings, skirting boards, windows, and doors. Whether you're preparing for painting, decorating, or improving insulation, our gap fillers offer smooth, durable finishes that resist shrinking and cracking. Choose from acrylic fillers, flexible decorators’ caulk and expanding foam options suitable for both interior and exterior use. Ideal for use on plaster, wood, masonry, and uPVC, these fillers ensure a professional, long-lasting result in any construction or DIY project. Shop trusted brands like Everbuild and Soudal for top-quality gap filling solutions with fast UK delivery and competitive prices.

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  • Everflex Weather Mate Gap Filler & Adhesive Clear 295ml
      Everbuild
      Everflex Weather Mate Gap Filler & Adhesive Clear 295ml
      Weather Mate Gap Filler & Adhesive by Everbuild has an outstanding formula making it perfect for all roofing applications, and it can adhere problematic surfaces together whilst being a significant perimeter gap filling. You can use this product for jointing, cracks and gap filling...
      £6.34
      incl. VAT
      £6.34
    • Everbuild Everflex Weather Mate Gap Filler & Adhesive Black 295ml
        Everbuild
        Everbuild Everflex Weather Mate Gap Filler & Adhesive Black 295ml
        Weather Mate Gap Filler & Adhesive by Everbuild has an outstanding formula making it perfect for all roofing applications, and it can adhere problematic surfaces together whilst being a significant perimeter gap filling. You can use this product for jointing, cracks and gap filling...
        £6.34
        incl. VAT
        £6.34
      • Everflex Weather Mate Gap Filler & Adhesive White 295mlEverflex Weather Mate Gap Filler & Adhesive White 295ml
          Everbuild
          Everflex Weather Mate Gap Filler & Adhesive White 295ml
          Weather Mate Gap Filler & Adhesive by Everbuild has an outstanding formula making it perfect for all roofing applications, and it can adhere problematic surfaces together whilst being a significant perimeter gap filling. You can use this product for jointing, cracks and gap filling...
          £6.34
          incl. VAT
          £6.34
        • Soudal B1 Fire Class Expanding Foam Handheld - 750ml
            Soudal
            Soudal B1 Fire Class Expanding Foam Handheld - 750ml
            The B1 Trade Expanding Foam by Soudal is an excellent expanding foam, ideal for various applications throughout a building. It's ideal for installing windows and door frames, general cavity filling, and sealing openings in roof construction. It improves thermal isolation in cooling systems and...
            £6.73
            incl. VAT
            £6.73
          • Soudal Handheld Gap Filler Expanding Foam - Champagne 750ml
              Soudal
              Soudal Handheld Gap Filler Expanding Foam - Champagne 750ml
              The Trade Expanding Foam by Soudal is the ultimate general-purpose expanding foam for tradespeople or DIYers. It offers outstanding filling capacity, with the most common surface suitable for adhering. With its fantastic acoustic and thermal properties, its value as an expanding foam outweighs competitors....
              £4.21
              incl. VAT
              £4.21
            • Soudafoam Gap Filler Genius Gun - 600ml
                Soudal
                Soudafoam Gap Filler Genius Gun - 600ml
                Discover Gap Filler Genius, the ultimate solution for sealing, insulating, and filling gaps in construction and DIY projects. This professional-grade expanding foam delivers exceptional 3D expansion for maximum coverage and a perfect fit. Easy to Use, One-Component Formula – No mixing required, ready to...
                £4.34
                incl. VAT
                £4.34
              • Everbuild Exact Gap Foam - 750mlEverbuild Exact Gap Foam - 750ml
                  Everbuild
                  Everbuild Exact Gap Foam - 750ml
                  The Exact Gap Foam by Everbuild is a high-quality, precise expanding foam that is formulated to deliver a long-lasting, robust filler. It's crafted specially by Everbuild technicians to prevent wasting expanding foam, which is common amongst conventional expanding foams. This product's lack of expansion compared to...
                  £7.47
                  incl. VAT
                  £7.47
                • Soudafoam Gun Gap Filler Expanding Foam 750ml
                    Soudal
                    Soudafoam Gun Gap Filler Expanding Foam 750ml
                    The Soudafoam Gun Gap Filler by Soudal is an exceptional polyurethane expanding foam with fantastic gap-filling and adhesive properties. It can expand to fill hard-to-reach areas, ensuring every crack and crevice is bridged. Its overall composite is freon-free, ensuring no harmful effects on the...
                    £5.15
                    incl. VAT
                    £5.15
                  • Evo-Stik Gripfill Gap Filling Adhesive – 350mlEvo-Stik Gripfill Gap Filling Adhesive – 350ml
                      Evo-stik
                      Evo-Stik Gripfill Gap Filling Adhesive – 350ml
                      The UK's No. 1 gap-filling adhesive trusted by professionals and DIYers alike, the Evo-Stik Gripfill™ delivers superior bond strength and incredible versatility across countless building materials. Key Features & Benefits Unrivalled Final Bond Strength: Offers a robust, long-lasting hold—say goodbye to nails and screws. ...
                      £2.72
                      incl. VAT
                      £2.72
                    • Soudal Gap Filler Expanding Foam Gun Grade - 750ml
                        Soudal
                        Soudal Gap Filler Expanding Foam Gun Grade - 750ml
                        The Trade Expanding Gunfoam by Soudal is the ultimate general-purpose expanding foam for tradespeople or DIYers. It offers outstanding filling capacity, with the most common surface suitable for adhering. With its fantastic acoustic and thermal properties, its value as an expanding foam outweighs competitors....
                        £4.21
                        incl. VAT
                        £4.21
                      • Soudal Genius Gun Gap Filling Foam - 750ml
                        Soudal
                        Soudal Genius Gun Gap Filling Foam - 750ml
                        The Genius Gun Gap Filling and Expanding Foam by Soudal is a versatile, fantastic polyurethane gap-filling expansion foam that provides excellent properties. Firstly, the insulation value is unmatched, achieving 37mW/m.K and the sound insulation achieves 56 dB. Outstanding stability, no post-expansion or shrinkage Fantastic...
                        £5.99
                        incl. VAT
                        £5.99
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