10 Best Car Window Sealant in The UK

Last updated on 02/07/2025
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Best Choice
1
9.8
Exceptional
WINDSCREEN GLASS SEALANT BONDING ADHESIVE GLUE CAR
WAYSIDE
WINDSCREEN GLASS SEALANT BONDING ADHESIVE GLUE CAR
Why We Love It
  • Strong bonding adhesive.
  • Easy application process.
  • Durable and reliable.
Main Highlights
  • WINDSCREEN GLASS SEALANT BONDING ADHESIVE GLUE CAR
  • Brand : WAYSIDE
  • Product type: AUTO ACCESSORY
9.8
Exceptional
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Best Value
2
9.7
Exceptional
Sika 522 Caravan and Motor Home Adhesive Sealant Cartridge, Black, 300 ml
Sika
Sika 522 Caravan and Motor Home Adhesive Sealant Cartridge, Black, 300 ml
Free Shipping
Why We Love It
  • Weather-resistant and UV-stable.
  • Suitable for indoor and outdoor.
  • Harmless to food regulations.
Main Highlights
  • VERSION Sikaflex-522 replaces Sikaflex-521 UV and Sikaflex-221i — 1 all-round product with even better properties.
  • PROPERTIES Weather-resistant, UV-stable, mildew resistant and aging resistant.
  • CAN BE USED INDOORS AND OUTDOORS For sealing external joints, windows, flaps, kitchenettes, sanitary areas on caravans and motorhomes. Also suitable for air conditioning and ventilation devices.
  • ADHESION TO COMMON SURFACES, e.g. wood, metals, primers and paints (2-K systems), ceramic materials and plastics, often without pretreatment.
  • SUITABLE IN THE FOOD SECTOR, EMISSION ARAM, CERTIFIED ISEGA certified, harmless to food regulations (e.g. sealing in the kitchen). EMICODE EC1PLUS certified, meets the highest EHS criteria (environment, health, safety). Meets hygiene requirements for air conditioning and ventilation systems according to VDI 6022. Sikaflex-522 is free of isocyanate, solvents, phthalate and silicones
  • Note The pictures shown indicate common traces that the production leaves behind. From our experience, it doesn't leak
9.7
Exceptional
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3
9.6
Superb
Save 4%
XFasten Silicone Sealant Waterproof Black Cartridge, 10.1 oz (Single Pack) Black Caulking Silicone Adhesive Sealant Cartridge for RV, General Use, Window, Door, Glass, Automotive Leak Sealing
XFasten
XFasten Silicone Sealant Waterproof Black Cartridge, 10.1 oz (Single Pack) Black Caulking Silicone Adhesive Sealant Cartridge for RV, General Use, Window, Door, Glass, Automotive Leak Sealing
4% OffFree Shipping
Why We Love It
  • Weatherproof protection against elements.
  • Long-lasting 15 years protection.
  • Easy and smooth application.
Main Highlights
  • INDUSTRIAL-GRADE WEATHERPROOF black silicone sealant that offers maximum protection against water damage, leaks, drips, UV, extreme heat, and pressure for both indoor and outdoor environment on most surfaces like metal, granite, stone, wood and glass.
  • RATED TO PROTECT UP TO 15 YEARS. This black silicone sealant adhesive is laboratory tested and rated to provide protection against dark spots, stains and other damage and stains caused by weather, water leaks, drips and heat.
  • EASY TO APPLY BLACK SILICONE CAULK CATRIDGE. The XFasten Waterproof Black Silicone Caulk is packed inside a high-pressure resistant cartridge that is equipped with a jam-resistant nozzle for easy and smooth application.
  • QUICK SETTING AND CURING. Do you need to quickly fix a leak on your door or shower glass? We got you covered! The XFasten Silicone sealant waterproof cartridge dries, sets and cures in 30 minutes and is ready to be exposed under the scorching heat or heavy rain.
  • DOES NOT SHRINK AND CRACK. With excellent adhesion, maximum flexibility and superior sheer stress resistance, our waterproof black silicone caulk will not shrink or crack even if constantly exposed under freezing temperatures, UV from scorching sunlight, or constant rain water drips.
9.6
Superb
Save 4%
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4
9.4
Superb
Save 30%
Sika – Sikaflex – 221 Strong Adhesive Sealant – Multi-Purpose Application – Sandable/Paintable – Black – 300ml
Sika
Sika – Sikaflex – 221 Strong Adhesive Sealant – Multi-Purpose Application – Sandable/Paintable – Black – 300ml
30% OffFree Shipping
Why We Love It
  • Professional-grade for expert use.
  • Long workability for flexible application.
  • NSF-approved for food safety.
Main Highlights
  • PROFESSIONAL USE PRODUCT – This is product is suitable for experienced professional users only.
  • LONG-OPEN TIME – Sikaflex 221 remains workable for up to 45 minutes once open and will develop a skin in 60 minutes, providing temperatures are between 5˚C and 40˚C.
  • VERSATILE – A multi-purpose sealant and adhesive with high adhesive strength. Bonds well to a wide variety of substrates, including metals, ceramics, plastics and painted materials.
  • PERMANENTLY ELASTIC – Cures using ambient moisture into an elastic but permanent seal that does not sag and can be sanded and painted as needed.
  • FOOD SAFE – NSF-Approved for incidental food contact.
  • AVAILABLE IN MULTIPLE COLOURS: Available in Black, White and Light Grey.
9.4
Superb
Save 30%
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5
9.3
Superb
Save 13%
Mannol Windshield Sealant 500ml Front Rear Side Window For Cars Vans And Special Purpose Vehicles
MANNOL
Mannol Windshield Sealant 500ml Front Rear Side Window For Cars Vans And Special Purpose Vehicles
13% OffFree Shipping
Why We Love It
  • High tensile shear strength.
  • Moisture-curing hardening mechanism.
  • Excellent elongation at break.
Main Highlights
  • Property test procedure unit value. 01. Chemical base 1-component PU. 02. Colour: black. 03. Density g/cm³ approx. 1.20
  • 04. Hardening mechanism moisture-curing. 05. Main image time/processing time min 20-25.
  • 06. Hardening speed 2.5mm/24h 07. Hardness ASTM D 2240 Shore 70. 08. Tensile shear strength MPa = 6.5.
  • 09. Elongation at break = 400%. 10. Thrust Module MPa = 2.5 11. Spec. Continuity resistance ohm·cm 1 x 108. 12. Travel time according to FMVSS min 60
  • 13. Travel time according to EU crash safety h 4. 14. Shelf life months 12. Complies with: Locti te Teroson PU 8597 HMLC. Manufacturer: Mannol. Box contents: 1 piece of 30 g as shown in the product image.
9.3
Superb
Save 13%
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6
9.1
Superb
Gtechniq C2 Ceramic Sealant for Cars, Protect Car Paintwork, Trim, Tyres and Windows, High Shine, Easy to Apply - 500ml (Sufficient for 2-3 Large Cars)
Gtechniq
Gtechniq C2 Ceramic Sealant for Cars, Protect Car Paintwork, Trim, Tyres and Windows, High Shine, Easy to Apply - 500ml (Sufficient for 2-3 Large Cars)
Free Shipping
Why We Love It
  • Unrivaled dirt, water protection.
  • Effortless application process.
  • Advanced scientific weather resistance.
Main Highlights
  • DIRT AND WATER REPELLENT: For unrivaled protection and a premium finish to your car’s bodywork, look to Gtechniq and their dirt and water repelling C2 Ceramic Sealant, providing you with the best possible hydrophobic protection come rain or shine.
  • EASY TO APPLY: If you’re unfamiliar with applying a ceramic coating, then the C2 Ceramic Sealant. Ensure your car is thoroughly clean and dry, and wipe onto your car using a Gtechniq MF1 ZeroR Microfibre Buff Cloth (also sold on Amazon). Apply onto a panel at a time, and ensure that you do not apply in direct sunlight. Wear gloves for protection, and layer for increased gloss and protection
  • SCIENTIFICALLY WEATHER TESTED - extensive tests both in the lab and real world, show the coating gives outstandingly high levels of swirl resistance and UV protection
  • MADE BY THE WORLD LEADER IN MOLECULAR NANOTECHNOLOGY – founded in 2001 by a quantum physicist, Gtechniq products are unique and use innovative, advanced technology to achieve a level of performance that outclasses any others on the market
  • 100% CUSTOMER SATISFACTION FROM UK BASED GLOBAL COMPANY – sold in 50 countries worldwide, Gtechniq has been the no 1 choice of high-end vehicles for over 20 years, and is passionate about the quality of its products and the stellar service it provides ​
9.1
Superb
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7
9.0
Superb
Save 11%
Meguiar's G8504EU Perfect Clarity Glass Sealant 118ml relentlessly repels rain
Meguiar's
Meguiar's G8504EU Perfect Clarity Glass Sealant 118ml relentlessly repels rain
11% Off
Why We Love It
  • Repels rainwater and contamination.
  • Significantly improves driving visibility.
  • Included grey applicator pad.
Main Highlights
  • GLASS PROTECTION: Hydrophobic sealant repels rainwater and contamination
  • CLEAN GLASS: Treated glass stays cleaner, longer
  • IMPROVED VISIBILITY: Significantly improves driving visibility during wet weather as the rainwater beads off your windscreen
  • STEP TWO OF TWO STEPS: For best results, prepare glass first with ideal clarity glass polishing compound
  • APPLICATOR INCLUDED: Supplied with grey applicator pad
9.0
Superb
Save 11%
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8
8.9
Excellent
CAMPERVAN T4 T5 WINDOW SIDE WINDOW WINDSCREEN BONDING SEALER KIT
WAYSIDE
CAMPERVAN T4 T5 WINDOW SIDE WINDOW WINDSCREEN BONDING SEALER KIT
8.9
Excellent
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9
8.8
Excellent
SOFT99 Ultra Glaco 70 ml - Durable Glass Coating for Car - Japanese Hydrophobic Fusso Chemical Liquid Wiper - Water Repellent Sealant - Rain Repellent Windscreen Protection - Integrated Applicator
SOFT99
SOFT99 Ultra Glaco 70 ml - Durable Glass Coating for Car - Japanese Hydrophobic Fusso Chemical Liquid Wiper - Water Repellent Sealant - Rain Repellent Windscreen Protection - Integrated Applicator
Why We Love It
  • Durable up to 12 months.
  • Effortless and easy application.
  • Reduces dirt and frost adhesion.
Main Highlights
  • Absolute number 1 among hydrophobic glass coatings!
  • Ultra Glaco is a legend in the liquid wiper category and one of the most popular products of this kind in the world.
  • Thanks to the Fusso technology of fluoropolymers being used here, it is unsurpassed in terms of durability of up to 12 months and resistance to harsh weather conditions.
  • Invaluable not only during rain and storm - Ultra Glaco works all year round.
  • It reduces the adhesion of dirt in summer and spring, and thanks to the slipperiness it provides, it will allow you to easily remove insect remains from your windshield.
  • In winter it will reduce or even completely block the adhesion of hard-to-remove frost and ice on your windshield!
  • Effortless and easy to apply.
  • The integrated felt applicator allows for an even coat to be applied every time, and the product formula makes polishing the residues a mere formality.
8.8
Excellent
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10
8.7
Excellent
Save 7%
Permatex 81730 Flowable Silicone Windshield & Glass Sealer, Helps Seal Leaks in Hidden and Hard to reach Areas, Forms a tough waterproof durable clear seal 1 x 42g
Permatex
Permatex 81730 Flowable Silicone Windshield & Glass Sealer, Helps Seal Leaks in Hidden and Hard to reach Areas, Forms a tough waterproof durable clear seal 1 x 42g
7% OffFree Shipping
Why We Love It
  • Durable and clear seal.
  • Resistant to extreme temperatures.
  • Seals hard-to-reach areas.
Main Highlights
  • Forms a tough, waterproof, durable, clear seal
  • Resistant to weather, extreme temperatures, vibration, shock and most shop chemicals
  • Flows into hidden and hard-to-reach areas to seal leaks
  • Fills surface voids and irregularities
  • Temperature Range: -80°F to 400°F (-62°C to 204°C)
8.7
Excellent
Save 7%
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