Top 7 Radiator Leak Sealant Home UK – Sealers

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Instant Repairs for Pipes, EVO-STIK Plumber's Mait Quick Leak Repair Putty, Radiators, Waterproof, 50g, Tanks & Cylinders

EVO-STIK - Strong, radiators, waterproof and fast setting epoxy putty designed for long lasting emergency plumbing repairs to leaking pipes, tanks and cylinders. Easy to apply - when dried it can be drilled, sanded, machined and painted. Ideal for bonding to copper, aluminium, steel, fibre glass, brass, acrylic and porcelain. Contents: 1x evo-stik plumber's Mait Quick Leak Repair Putty, 50g. Can be applied to damp or wet surfaces, Waterproof and chemical resistant, Resists temperatures up to +150°C.
Height20.3 cm (7.99 Inches)
Length11.4 cm (4.49 Inches)
Weight0.05 kg (0.11 Pounds)
Width3 cm (1.18 Inches)
Part Number30812665
WarrantyNo guarantee

2. Polar Specialist Coatings

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

Polar Specialist Coatings - Not only gives instant repair to leaks and cracks, but also provides a long lasting protection. Apply a minimum 2-3 coats, leaving 10-15 minutes between applications. Effective against window and external water pipe leaks & cracks. 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, plastic, ceramics, PVC, wood, roofs, gutters, external drain pipes and much more.

Allow 24 hours to dry, for maximum paint hardness. For emergency fixes - quickly and easily repair cracks and leaks on gutters, which is ideal for emergency work on a wide range of surfaces. Instant waterproof - polar leak sealer spray provides an instant waterproof seal with excellent resistance to weathering and a high covering power.

Our leak sealer comes in a variety of colours; Clear, White or Black. Long lasting protection - specifically designed with a rubberised protective formula. Stop leaks fast, external pipes & windows. Plastic and external drain pipe sealant. Our easy to apply formula delivers instant protection, with our waterproofing spray that gets to work right away. Our leaksealer offers high performance, long-term waterproof & corrosion protection.
BrandPolar Specialist Coatings
ManufacturerPolar Protective Products
Height18 cm (7.09 Inches)
Length18 cm (7.09 Inches)
Weight0.34 kg (0.75 Pounds)
Width7 cm (2.76 Inches)
Part NumberLEAKSEAL1209

3. CosWarm

Stops Minor Leaks & Weeps, Fixes Pressure Loss & Leaking Pipes, Stops Leak, CosWarm CW4 Central Heating Leak Sealer, Boiler Leak Repair & Sealant, Treats Up to 18 Radiators

CosWarm - Safe to use around people, chemical formulas. Our boiler leak sealant also helps in fixing pressure loss due to minor leaks from central heating systems. Super concentrated formula: our boiler and central heating system leak stopper can treat up to 18 single radiators, a 150-litre system.

It is easy to use, i. E. Just pour it in the system according to the instructions and let it work. Harmless for metals: there are many leak sealant chemicals that are not friendly when they come into contact with metals. It does not interfere with the working of your central heating systems and you won’t have to shut down the systems before or while using it. As it is biodegradable, the boilers & the environment: our non-toxic radiator leak sealer is a safer alternative compared to other toxic, the environment and your heating systems.

Stops small leaks & fixes pressure loss: cw4 leak sealer seals all the small and inaccessible leaks, thus saving time and money in draining down and repairing cost. Cw4 leak sealer liquid is suitable for use with all the metals and materials, including steel, ferrous metals, copper and aluminium. Safe for you, it won’t harm mother nature either. Convenience at its best: our leak sealer and stopper makes minor repairs in the boiler a breeze. The product can be left in the system permanently.
Part NumberCosWarmCW4


JENOLITE Stop Leak Sealer Spray, Waterproof sealant, BLACK, 400ml, Fills, Seals & Stops Leaks

JENOLITE - Suitable for the quick repair of guttering, pipework, windows, drains, roofs and other leaking areas. Waterproof seal stops leaks and drips fast. Dries to create a waterproof seal. Completely waterproof and corrosion resistant surface. Remains flexible & pliable for years after use.
Part Number89090
ModelBlack 1

5. Unknown

Clear, Corgi TRIPCON5-C Concentrated Central Heating Leak Sealer

Unknown - Non-acidic, non-caustic - safe to handle. Controls scale and maintains boiler efficiency. To seal inaccessible leaks and weeping joints. Concentrated 500ml treats up to 10 radiators - a typical central heating system. Reduces pressure loss in sealed systems & does not cause blockages in circulator pumps or air vents.
Height18.5 cm (7.28 Inches)
Length9 cm (3.54 Inches)
Width4.5 cm (1.77 Inches)
Part NumberTRIPCON5-C
WarrantyNo guarantee.

6. Generic

Everad, 500ml Concentrated Leak Sealer for Central Heating Systems & Radiators, for Multi-Metal Systems – Including Aluminium. Non Acid, Seals Small Leaks & Weeping Joints Under an Hour

Generic - Can be used with: it can be used on its own or with our everadcorrosion inhibitor, EVERADDescaler & Sludge Dispersant, EVERADConcentrated Cleanser & EVERADConcentrated System Silencer, all of which will increase the efficiency and life of your heating system.

High performance: a specifically formulated compound for old central heating system and antique radiators. Uk manufactured: made in the uk using only the best ingredients making it fast acting and long lasting. Helps to internally repair small leaking and weeping joints in the heating system in less than an hour without interfering with pumps or valves. Safe to use: our modern, safe and environmentally safe leak sealer formulation provides a combination of gentle properties which will not harm or damage your heating system and radiators like other concentrate leak sealer brands.

Money back guarantee: we are 100% confident you will love our product but in the unlikely event you're not completely happy with your purchase we will provide you with a full refund in accordance with Amazon terms. Can be used on old and new central heating systems.

7. EVO

EVO-STIK 50g Plumbers Mait Quick Leak Repair Putty

EVO - Plumbers mait Quick Leak Repair Putty. A strong waterproof putty which sets very fast. Ideal for instant repair to pipes, radiators, tanks and cylinders. Once set the putty can be drilled, sanded and painted.
Weight0.08 kg (0.18 Pounds)
Part Number90421