Top 10 Exterior Mastic Sealant UK – Sealers

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1. Unibond

UniBond Outdoor Fill&Repair Sealant, Joint Filler, 1x398g Cartridge, White Polymer Outdoor Sealant, Durable Weatherproof Sealant for Exteriors

Unibond - Sealing made easy – sealing the weather out of your home is easy. 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.

Keep harsh weather outside by applying sealant to joints, cracks and frames, facades, so you can enjoy and relax inside. Seal your home to the elements and don´t let the weather get in. All weather – this high-quality adhesive formula has the strength of a glue and is designed to resist rain, cold, heat & sun for years. High-performance – get outside and seal those gaps even in the harshest conditions.

Package contents – unibond outdoor fill&repair Sealant, white, weather-resistant window frame sealant, works on wet surfaces & in cold conditions, 1x398 g Cartridge. The unique technology of uniBond Outdoor Fill&Repair allows it to be applied to wet surfaces & in cold temperatures.
BrandUnibond
ManufacturerHenkel
Height23 cm (9.06 Inches)
Length5 cm (1.97 Inches)
Weight0.4 kg (0.88 Pounds)
Width5 cm (1.97 Inches)
Part Number2652146
Model2652146

2. Everbuild

290 ml, Everbuild External Frame Acrylic Sealant, White

Everbuild - Once cured the sealant can be over painted if required with most paints. Suitable for internal and external use around window and door frames Internal only on PVCu. Available in white, stone, grey and brown. Also suitable to be used to seal cracks and gaps in brickwork, stone and concrete. Apply using a caulk, sealant / adhesive cartridge application gun, we recommend the Everbuild Power Pro Heavy Duty Sealant / Adhesive Cartridge Applicator Gun. Provides a permanently flexible, long lasting, mould resistant seal.
BrandEverbuild
ManufacturerSika Everbuild
Height1.2 cm (0.47 Inches)
Length23 cm (9.06 Inches)
Weight0.48 kg (1.06 Pounds)
Width8.2 cm (3.23 Inches)
Part NumberEXTWH
ModelEXTWE-EB

3. Everbuild

Translucent, 300 ml, Everbuild Everflex 450 Premium+ Builders Silicone Sealant

Everbuild - Suitable as an expansion joint sealant with excellent flexibility - +/- 25% and excellent adhesion - adheres to most common surfaces including glass, metals, plastics and wood also Suitable for use on polycarbonate.

Brand: Everbuild. Weather sealing for parapet and roofs and joint sealing to pre-formed panels and General glazing sealing and draughtproofing, including repair work over existing sealant. Bedding insulated glass units in accordance with relevant clauses of BS8000 Part 7 and High resistance to plasticiser migration - may be used over water based and solvent based paints. Size: 300 ml. Perimeter pointing internally and externally around PVCu /wood and all other window frames. Sealing and as an adhesive onto PVCu, plastic trims and components with low dirt pick up. Silicone 450 Builders Silicone.
BrandEverbuild
ManufacturerSika Everbuild
Height4.4 cm (1.73 Inches)
Length23.1 cm (9.09 Inches)
Weight0.04 kg (0.09 Pounds)
Width6.5 cm (2.56 Inches)
Part NumberEVB450CL
Model450TR-EB

4. Unibond

UniBond Outdoor Window and Door Frame Sealant, White Outdoor Sealant, Durable Weatherproof Door and Window Sealant, Cartridge

Unibond - 25-year guarantee – as long as you follow the instructions for use, this exterior sealant is covered by a quarter-century guarantee - we're confident in its durability. Multi materials – this durable adhesive sealant can be used on various materials such as wood, uPVC, polycarbonate, and metal - suitable for most window and door frames.

Package contents – unibond outdoor window and Door Frame Sealant, white, weather-resistant silicone sealant, flexible and long-lasting waterproof sealant, Cartridge. Flexible and waterproof – as well as providing strong and flexible sealing, this window frame sealant is also waterproof, so it can stand up to harsh weather conditions. Permanently flexible – our uniBond waterproof sealant provides a durable flexible perimeter seal for exterior window and door frames, protecting you from the elements.
BrandUnibond
ManufacturerHenkel Ltd
Height23 cm (9.06 Inches)
Length5 cm (1.97 Inches)
Weight0.46 kg (1.01 Pounds)
Width5 cm (1.97 Inches)
Part Number2078170
Model2078170
Warranty25-year warranty.

5. Everbuild

Grey, Everbuild External Frame Acrylic Sealant, 290 ml

Everbuild - Suitable for internal and external use around window and door frames Internal only on PVCu. Also suitable to be used to seal cracks and gaps in brickwork, stone and concrete. Provides a permanently flexible, long lasting, mould resistant seal. Available in white, stone, grey and brown. Once cured the sealant can be over painted if required with most paints. Apply using a caulk, sealant / adhesive cartridge application gun, we recommend the Everbuild Power Pro Heavy Duty Sealant / Adhesive Cartridge Applicator Gun.
BrandEverbuild
ManufacturerSika Everbuild
Height5 cm (1.97 Inches)
Length23 cm (9.06 Inches)
Weight0.48 kg (1.05 Pounds)
Width5 cm (1.97 Inches)
Part NumberEXTGR
ModelEXTGY-EBD

6. Everbuild

290 ml, Brown, Everbuild External Frame Acrylic Sealant

Everbuild - External Frame Sealant. Suitable for internal and external use around window and door frames Internal only on PVCu. Available in white, stone, grey and brown. Provides a permanently flexible, long lasting, mould resistant seal. Once cured the sealant can be over painted if required with most paints. Apply using a caulk, sealant / adhesive cartridge application gun, we recommend the Everbuild Power Pro Heavy Duty Sealant / Adhesive Cartridge Applicator Gun. Also suitable to be used to seal cracks and gaps in brickwork, stone and concrete. Brand: Everbuild.
BrandEverbuild
ManufacturerEverbuild
Height5 cm (1.97 Inches)
Length23 cm (9.06 Inches)
Weight0.48 kg (1.05 Pounds)
Width5 cm (1.97 Inches)
Part NumberEXTBR
ModelEXTBR

7. Evo-Stik

Colour: Clear, EVO-STIK All Purpose Silicone Sealant, Suitable for a host of different applications, Waterproof

Evo-Stik - Evo-stik all purpose silicone sealant - high quality, flexible sealant with excellent weather, sunlight and mould resistance. Can be used to seal anything from door and window frames to baths, showers and sinks. Suitable for interior and exterior use. Contents: 1x evo-stik all purpose silicone Sealant, Waterproof, Suitable for a host of different applications, Clear. Easy to clean with a 25-year guarantee.
BrandEvo-Stik
ManufacturerEvo Stik
Height4.8 cm (1.89 Inches)
Length23.29 cm (9.17 Inches)
Weight0.3 kg (0.66 Pounds)
Width6.2 cm (2.44 Inches)
Part Number30811724
Model30811724

8. Everbuild

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

Everbuild - Perimeter gap filling around window and door frames; ideal for timber frames where woodstaining is required. For all external weatherproofing applications.

For all roofline applications and jointing all types of guttering, filling cracks in stone tiles/slates etc. Can be applied in all weathers, sticks to wet surfaces and for remedial weather proofing over all sealants, putties and mastics. For filling gaps between metal and composite roof and wall panels to form an effective lap joint bond. Adheres to problematic surfaces such as bitumen, asphalt, lead and galvanized steel and general industrial metal panel bonding and gap filling.
BrandEverbuild
ManufacturerSika Everbuild
Height23 cm (9.06 Inches)
Length5 cm (1.97 Inches)
Weight0.01 kg (0.03 Pounds)
Width5 cm (1.97 Inches)
Part NumberEVBWEABK
ModelWEABK-EB

9. Everbuild

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

Everbuild - Perimeter pointing internally and externally around doors and windows with good external weathering properties. Size: 310ml. High solids formulation - excellent gap filling proper- ties. 115 gp build Mastic. Typically used to seal composite sectional panels and low movement vertical building joints. Adheres to concrete, brick, wood, metals and glass without the use of a primer. Overpaintable. Brand: Everbuild. Semi drying - remains permanently plastic beneath surface skin.
BrandEverbuild
ManufacturerToolbank
Height23 cm (9.06 Inches)
Length4.9 cm (1.93 Inches)
Weight0.59 kg (1.3 Pounds)
Width4.9 cm (1.93 Inches)
Part NumberEVBMASST
ModelMASNL

10. Build With Colour

Silicone Sealant RAL Colour Matched, Interior & Exterior Applications 7016 Anthracite Grey

Build With Colour - Interior & Exterior Uses. Bathrooms, Cars, Boats Windows etc. 310ml tube. Ral colour Matched. Neutral on the tube refers to 'neutral Cure' NOT THE COLOUR.
BrandBuild With Colour
ManufacturerBuild with Colour
Height7 cm (2.76 Inches)
Length24 cm (9.45 Inches)
Width7 cm (2.76 Inches)