Top 9 External Gap Filler UK – Sealers

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1. Everbuild

Clear, Everbuild Everflex Weather Mate, Gap Filler and Adhesive, 295 ml

Everbuild - For filling gaps between metal and composite roof and wall panels to form an effective lap joint bond. Can be applied in all weathers, sticks to wet surfaces and for remedial weather proofing over all sealants, putties and mastics.

For all roofline applications and jointing all types of guttering, filling cracks in stone tiles/slates etc. Perimeter gap filling around window and door frames; ideal for timber frames where woodstaining is required. Adheres to problematic surfaces such as bitumen, asphalt, lead and galvanized steel and general industrial metal panel bonding and gap filling. For all external weatherproofing applications.
ManufacturerSika Everbuild
Height23 cm (9.06 Inches)
Length5 cm (1.97 Inches)
Weight0.2 kg (0.43 Pounds)
Width5 cm (1.97 Inches)

2. Unibond

Durable Weatherproof Sealant for Exteriors, Joint Filler, 1x291g Cartridge, UniBond Outdoor Fill&Repair Sealant, Transparent Polymer Outdoor Sealant

Unibond - All weather – this high-quality adhesive formula has the strength of a glue and is designed to resist rain, cold, heat & sun for years. Package contents – unibond outdoor fill&repair Sealant, transparent, weather-resistant window frame sealant, works on wet surfaces & in cold conditions, 1x291g Cartridge.

The unique technology of uniBond Outdoor Fill&Repair allows it to be applied to wet surfaces & in cold temperatures. Seal your home to the elements and don´t let the weather get in. Easy to apply – the unique technology makes this exterior sealant easy to apply and smooth, easy on the nose, and easy to enjoy for years to come.

Sealing made easy – sealing the weather out of your home is easy. High-performance – get outside and seal those gaps even in the harshest conditions. Keep harsh weather outside by applying sealant to joints, facades, cracks and frames, so you can enjoy and relax inside.
Height23 cm (9.06 Inches)
Length5 cm (1.97 Inches)
Weight0.29 kg (0.64 Pounds)
Width5 cm (1.97 Inches)
Part Number2646366

3. Hitlineuk

Wall Panelling, Insulating Foam Filler Spray 500ML Gap Expanding Spray, Bonding, Sealing, Filling, Expanding Foam Filler PU Expansion Insulation BONDING Filling Expanding Foam

Hitlineuk - Expanding foam filler is for roof tile voids and draught points around the home. Gaps and cracks in walls and floorboards. Electrical wire chasing prior to plastering. Deep joints prior to applying sealant or plaster. Foal filler spray is use for Gaps around pipe entries through walls.
Height8 cm (3.15 Inches)
Length24 cm (9.45 Inches)
Weight0.42 kg (0.93 Pounds)
Width6 cm (2.36 Inches)

4. Sterlix

Sterlix Expanding Foam Filler 500ml – Waterproof Caulk Spray Sealant for Walls | Repair Indoors & Outdoors Masonry Floors Ceilings Roofs etc.| Use for Gaps Cracks & Holes in Stone Brick Wood Metal 1

Sterlix - Spray nozzle – comes with an attachable nozzle that you can use to squeeze into gaps to fill and seal them tight with utmost ease! Multi-surface – an ideal solution to plug large cracks and holes in stone, wood, brick and metal and ceramic, this is a perfect all rounder.

Expanding – our expanding foam is ideal for filling up large holes or cracks as it rapidly expands to up to many times to original volume. Versatile – use this expanding caulk for waterproofing, sound proofing, insulation and more. Quick dry – only takes about an hour to fully dry out, sanded down, allowing you time to adjust or remove, whilst also not taking too long of a wait. It’s a very useful household tool allowing you to seal gaps in your bathroom, for your windows, pipes and plumbing! This can also be painted, cut or sawn once dry.

5. Unknown


Unknown - 500ml. Waterproof expanding foam filler. An ideal solution to large cracks and holes in stone, wood, brick and metal. Can be cut, sawn, painted and sanded. Squeezes into gaps and fills them tight.
Weight0.53 kg (1.17 Pounds)
Part NumberLG Beauty LED Mask

6. Ronseal

Ronseal, Smooth Finish Exterior Multi Purpose Ready Mix Filler Tub 1.2 kg

Ronseal - For use in repairing plaster, stone, concrete or wood. The ronseal rslermf12kg is supplied in a 1. 2kg tub with re-sealable lid. Both for interior and exterior use.
Weight0.57 kg (1.25 Pounds)
Part Number36562

7. Everbuild

Everbuild Everflex 115 Contract GP General Purpose Building Mastic, Brown, 285 ml

Everbuild - Adheres to concrete, brick, wood, metals and glass without the use of a primer. Semi drying - remains permanently plastic beneath surface skin. Typically used to seal composite sectional panels and low movement vertical building joints. Overpaintable. Perimeter pointing internally and externally around doors and windows with good external weathering properties. 115 gp build Mastic. High solids formulation - excellent gap filling proper- ties. Size: 285 ml. Brand: Everbuild.
Weight0.64 kg (1.41 Pounds)

8. Everbuild

Light Grey, 1 Litre, Everbuild Ready Mixed Deep Gap Filler

Everbuild - Finishes to a light grey smooth surface in around 30 minutes with no need to sand prior to painting, staining or papering over. Easy to use and work paste that is incredibly simple to apply straight from the tub. Brand: Everbuild. Size: 1lTR. Deep gap Filler. No risk of shrinking, cracking or sagging even on ceiling applications thanks to the fillers lightweight properties. Revolutionary ceramic spheres formulation provides the ability to fill holes, cracks and gaps up to 50 mm deep in a single application.
ManufacturerSika Everbuild
Weight1.2 kg (2.65 Pounds)

9. SFM Rapide

1x, 500ml Gap Expanding Foam Filler PU Expansion Insulation BONDING Filling

SFM Rapide - Gaps around window frames, door frames. Electrical wire chasing prior to plastering. 500ml gap expanding foam filler pu expansion insulation bonding filling hlu roof tile voids and draught points around the home. Gaps around pipe entries through walls. Gaps and cracks in walls and floorboards. Deep joints prior to applying sealant or plaster.
BrandSFM Rapide