10 Best Steel Seal Head Gasket Repair in The UK

Last updated on 05/09/2025
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Best Choice
1
9.8
Exceptional
BLUE DEVIL HEAD GASKET SEALANT
BlueDevil Products
BLUE DEVIL HEAD GASKET SEALANT
Main Highlights
  • HEAD GASKET SEALER, CRACKED BLOCK, WARPED HEAD
9.8
Exceptional
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Best Value
2
9.7
Exceptional
GREEN DEMON Head Gasket and Block Repair | Ceramic Reinforced Head Gasket Sealer | Advanced Coolant Leak DIY Permanent Repair | Engine/Cylinder Sealant | for Cars, SUVs, Trucks | 16oz
GREEN DEMON
GREEN DEMON Head Gasket and Block Repair | Ceramic Reinforced Head Gasket Sealer | Advanced Coolant Leak DIY Permanent Repair | Engine/Cylinder Sealant | for Cars, SUVs, Trucks | 16oz
Why We Love It
  • Safe for all engine types.
  • Permanent seal in minutes.
  • Trusted by professionals and mechanics.
Main Highlights
  • HEAD GASKET SEALER: Fix it with Green Demon! Safe for all engines from bikes to trucks. Just shake and pour the gasket liquid sealant into the radiator cap to permanently seal and repair the leak. Green Demon magic takes effect in just a few minutes!
  • JUST ONE APPLICATION REPAIR: No engine flushing or draining required. A super strength ceramic formula flows through the cooling system to reach damaged areas. Particles combine creating a mesh that cures and repairs leaks to form a permanent sealed bond.
  • FIX PERMANENTLY: Find coolant puddles? Get Green Demon in your vehicle to avoid costly repairs. Green Demon fixes head gasket failures from coolant to cylinder/cylinder to coolant leaks, blown head gaskets and coolant to oil leaks (in certain situations).
  • DON’T BLOW A GASKET: Fix it! Stop leaks, easily and safely. Use on Head Gaskets, warped or cracked cylinder heads, engine blocks, radiators, heater cores and freeze plugs. Perfect Do-It-Yourself car solution for those expensive and time-consuming repairs.
  • TRUSTED BY PROFESSIONALS: Scientifically engineered, the Green Demon Head Gasket & Block Repair is road tested and mechanic trusted. Save on repairs and extend the life of your car. Buy with confidence - with our 100% money-back or replacement guarantee.
  • Attention: If you notice bubbles coming from the radiator or coolant reservoir, or if Green Demon engine coolant leak stop isn't sealing, the system might be over-pressurized. Please watch the video on this page for additional instructions to ensure a successful repair.
9.7
Exceptional
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3
9.5
Superb
Rislone HEAVY DUTY BLOWN HEAD GASKET REPAIR
Rislone
Rislone HEAVY DUTY BLOWN HEAD GASKET REPAIR
Free Shipping
9.5
Superb
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4
9.4
Superb
Focus Steel Seal Blown Cylinder Head Gasket Fix Repair Sealer
Street Rhino
Focus Steel Seal Blown Cylinder Head Gasket Fix Repair Sealer
Why We Love It
  • Repairs blown head gaskets.
  • Handles all gasket failures.
  • Restores warped cylinder heads.
Main Highlights
  • Fixes Blown Head Gaskets
  • Fixes All types of head gasket failure
  • Fixes Warped Cylinder Head
  • Fixes Cracked Blocks
  • Fixes Dropped Liners
9.4
Superb
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5
9.3
Superb
Transit Steel Seal Blown Cylinder Head Gasket Fix Repair Sealer
Street Rhino
Transit Steel Seal Blown Cylinder Head Gasket Fix Repair Sealer
Why We Love It
  • Repairs Blown Head Gaskets.
  • Addresses All Head Gasket Failures.
  • Restores Warped Cylinder Heads.
Main Highlights
  • Fixes Blown Head Gaskets
  • Fixes All types of head gasket failure
  • Fixes Warped Cylinder Head
  • Fixes Cracked Blocks
  • Fixes Dropped Liners
9.3
Superb
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6
9.2
Superb
BLUE DEVIL POUR AND GO HEAD GASKET SEALANT
BlueDevil Products
BLUE DEVIL POUR AND GO HEAD GASKET SEALANT
Why We Love It
  • Easy installation and cost-effective.
  • High success rate assurance.
  • Repairs various engine issues permanently.
Main Highlights
  • Easy to Use no need for additional costs on anti freeze and flushes
  • Over 90% Success Rate
  • Permanently repairs most blown head gaskets, cracked heads, warped heads and cracked blocks
9.2
Superb
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7
9.2
Superb
Peugeot Boxer Steel Seal Blown Cylinder Head Gasket Fix Repair Sealer
Street Rhino
Peugeot Boxer Steel Seal Blown Cylinder Head Gasket Fix Repair Sealer
Why We Love It
  • Repairs Blown Head Gaskets.
  • Restores Warped Cylinder Heads.
  • Fixes Cracked Engine Blocks.
Main Highlights
  • Fixes Blown Head Gaskets
  • Fixes All types of head gasket failure
  • Fixes Warped Cylinder Head
  • Fixes Cracked Blocks
  • Fixes Dropped Liners
9.2
Superb
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8
9.0
Superb
Save 13%
Steel Seal SSAMZ Head Gasket Repair
Steel Seal
Steel Seal SSAMZ Head Gasket Repair
13% Off
Why We Love It
  • Versatile for all vehicles.
  • Efficient in gasket failures.
  • Compatible with all antifreeze.
Main Highlights
  • Steel Seal will work on all vehicles: cars, bikes, vans, pickups, 4x4s, tractors, lorries and boats.
  • Blown Head Gaskets
  • All Types of Head Gasket Failure
  • Warped Cylinder Head
  • Now compatible with all types of antifreeze and any vehicle with a water cooled system
9.0
Superb
Save 13%
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9
8.9
Excellent
The Award Winning Steel Seal
Steel Seal
The Award Winning Steel Seal
Why We Love It
  • Easy to use for quick repairs.
  • Protects cooling system from blockages.
  • Compatible with all water-cooled engines.
Main Highlights
  • NOW WITH IMPROVED SHAPE - Even more durable effect: repairs all types of side leaks in the engine. Classic symptoms: loss of cooling water, white smoke on the exhaust, oil in the cooling water, water in the oil, exhaust gas/pressure in the cooling system (plus follow the instructions in English). ::: Leak head gasket, cylinder head and engine block:::::::::: Suitable for all water cooled engines (car, truck, bus, SUV, tractor etc.)
  • Easy to use: Quick repairs + no disassembly + exchange of cylinder head gasket in the workshop and convince you with the result of Steel Seal. +++ Keep the recommended dosage: [Cylinder capacity up to 2.5 litres = 1 bottle]: [2.5 to 4 litre capacity = 2 bottles]: [4 litre cylinder = 3 bottles]. In case of high pressure in the cooling system: leave the cooling lid open during application.
  • PROTECTS COOLING SYSTEM: Unlike other "coolants", Steel Seal is 100% free of filling materials (fibres, granules, etc.). This prevents unwanted deposits and blockages in the cooling system. Due to its unique action (thermochemical bonding process), the repair remains permanent after successful application on the cylinder head gasket.
  • Preparation: The key is done: rinse the cooling system with clear water before application, if other Extended or Longlife mediums, additives or coolant have been used, or if the coolant has visible impurities. After applying Steel Seal, rinse the cooling system again with water and fill it with fresh coolant.
8.9
Excellent
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10
8.7
Excellent
Save 8%
K-Seal Ultimate Head Gasket & Block Repair | Seal & Fix Coolant Leaks, 472ml
K-Seal
K-Seal Ultimate Head Gasket & Block Repair | Seal & Fix Coolant Leaks, 472ml
8% OffFree Shipping
Why We Love It
  • Provides permanent solutions for leaks.
  • Suits various vehicle engine sizes.
  • Ensures long-lasting repair.
Main Highlights
  • PERMANENT REPAIR: Our advanced formula with 33% more sealing power than regular K-Seal, ensures a long-lasting, permanent seal for challenging leaks. Permanently fixes blown head gaskets, cracked heads & porous engine blocks in cars.
  • STOP HOLES & CRACKS: With just 1 step our unique formula with ceramic micro-fibres, will permanently seal leaks up to 0.64mm in size, without any adverse impact on the engine.
  • EASY TO USE: It requires no draining or flushing; just shake, pour & go - shake the bottle, add the fluid wherever you top up your coolant & run your engine as normal. For larger engines (HGV's / Plant) use 2 bottles.
  • VERSATILE COMPATIBILITY: Works with all types of coolant & compatible with a wide range of vehicle engine materials & heavy duty machinery. A permanent fix for the lifetime of the engine.
  • PROFESSIONAL-GRADE RELIABILITY: Trusted by mechanics, our sealer treatment delivers a durable & long-lasting repair. A cost-effective head gasket & block repair, enhancing the performance of your vehicle’s cooling system. We've sold millions worldwide & are independently verified by university testing to meet ASTM D3147.
8.7
Excellent
Save 8%
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