Top 5 Sentinel Leak Sealer UK – Sealers

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1. Sentinel

Seals All Minor leaks and Weeping Joints in Heating Systems, Will not Cause blockages in The Heating System, Sentinel Leak Sealer 1L, Suitable for All Metals Including Aluminium

Sentinel - Ideal for sealing small leaks or weeping joints on all types of indirect central heating systems. Suitable for all metals including aluminium. Seals all minor leaks. Seals small leaks or weeping joints on all types of indirect central heating systems. Compatible with other Sentinel products.
Height21 cm (8.27 Inches)
Length10.12 cm (3.99 Inches)
Part NumberSentinel Leak Sealer

2. Polar Specialist Coatings

Instant Repair & Long Lasting Protection, Tough Waterproof Sealant, Ideal for Drain & External Pipe Leaks & Cracks, Polar S1 Superior Clear Leak Sealer Spray, Interior & Exterior Use, 400ml

Polar Specialist Coatings - Long lasting protection - specifically designed with a rubberised protective formula. Effective against window and external water pipe leaks & cracks. Not only gives instant repair to leaks and cracks, but also provides a long lasting protection. Allow 24 hours to dry, without compromising on the quality and performance.

Our easy to apply formula delivers instant protection, which is ideal for emergency work on a wide range of surfaces. Apply a minimum 2-3 coats, for maximum paint hardness. Our leak sealer comes in a variety of colours; Clear, White or Black. Our leaksealer offers high performance, long-term waterproof & corrosion protection. Stop leaks fast, with our waterproofing spray that gets to work right away. Easy to use - the spray formulation makes leak sealer easy to use and ideal for application on all outdoor repair work, leaving 10-15 minutes between applications.

Instant waterproof - polar leak sealer spray provides an instant waterproof seal with excellent resistance to weathering and a high covering power. Multi-purpose use for interior & exterior surfaces - can be used on interior and exterior surfaces to seal fine leaks and cracks for a wide variety of applications such as metal, roofs, ceramics, wood, gutters, PVC, plastic, external drain pipes and much more. Plastic and external drain pipe sealant. For emergency fixes - quickly and easily repair cracks and leaks on gutters, external pipes & windows.
BrandPolar Specialist Coatings
ManufacturerPolar Protective Products
Height18 cm (7.09 Inches)
Length18 cm (7.09 Inches)
Weight0.4 kg (0.88 Pounds)
Width7 cm (2.76 Inches)
Part NumberLEAKSEAL1209

3. Fernox

Yellow, Fernox 61016 LS-X Leak Sealer External 50 GM

Fernox - Wras approved- completely safe to use with drinking water. Jointing compound and external leak. Ideal for use on compression joints and screwed fittings. Ready to use, no mixing. Never sets rock hard; joints can easily be undone.
Weight0.06 kg (0.13 Pounds)
Part Number61016

4. Select Products

SEL9260: Central Heating Dosing Tool, Add Chemicals Like Fernox Central Heating Inhibitor, Leak Sealer & Sentinel X100 to Your Central Heating System with Ease, Sludge Remover, QuickFill

Select Products - Quick and easy dosing of chemicals into central heating systems. Compatibility: 1/2" BSP radiator tappings. Gravity-fed dosing method for effortless and accurate chemical introduction. Suitable for use with inhibitors, sludge removers or anti-freeze. Dose a system with up to 1 litre of Inhibitor, Antifreeze or sludge remover in under 17 Seconds.
BrandSelect Products
ManufacturerSelect Products
Weight0.1 kg (0.22 Pounds)
Part Number8037085

5. Everbuild

Compatible with all Metals, 500 ml, Everbuild P32 Central Heating System Leak Sealer, Permanently Seals Internal and Inaccessible Leaks

Everbuild - Compatible with all metals and materials commonly used in central heating systems. Effective within 1 - 24 hours and has been tested and proven to prevent blockages or restrictions in system components without blocking valves, pumps or air vents.

This 500ml bottle will treat approximately 60 radiators. Rapid, internal leak sealer that is designed for central heating systems suffering from small, inaccessible leaks and weeps which may cause pressure loss. Suitable for central heating systems suffering from small, inaccessible leaks. Once added to the system, the product locates the area of water loss and forms a soft barrier to permanently seal the hole.
Weight0.54 kg (1.19 Pounds)
Part NumberP32