Head Gasket & Exhaust Sealant

Our range of head gasket repair products and exhaust sealants offer easy solutions to get your engine running smoothly and efficiently again. Whether you’ve got a leak, a blown head gasket, or want to prevent an overheated radiator - you can fix the issue at home with Halfords.

Stock Finder
Add your postcode to see products available for collection near you and home delivery
Use my location
18 results
Sort by:
Sort by
Halfords Recommends
Holts
4.6 / 5 (205)
£4.00
+ Extra 10% off when you spend £30
Use code: PAYDAY10
£4.00
Only £3.80 with Motoring Club premium
View details
View details
Only £3.80 with Motoring Club premium
View details
Holts
4.5 / 5 (355)
£9.49
+ Extra 10% off when you spend £30
Use code: PAYDAY10
£9.49
Only £9.02 with Motoring Club premium
View details
View details
Only £9.02 with Motoring Club premium
View details
Holts
4.7 / 5 (158)
£4.00
+ Extra 10% off when you spend £30
Use code: PAYDAY10
£4.00
Only £3.80 with Motoring Club premium
View details
View details
Only £3.80 with Motoring Club premium
View details
Holts
4.3 / 5 (102)
£4.00
+ Extra 10% off when you spend £30
Use code: PAYDAY10
£4.00
Only £3.80 with Motoring Club premium
View details
View details
Only £3.80 with Motoring Club premium
View details
Holts
4.7 / 5 (41)
£6.00
+ Extra 10% off when you spend £30
Use code: PAYDAY10
£6.00
Only £5.70 with Motoring Club premium
View details
View details
Only £5.70 with Motoring Club premium
View details
Granville
4.4 / 5 (112)
£3.99
+ Extra 10% off when you spend £30
Use code: PAYDAY10
£3.99
Only £3.79 with Motoring Club premium
View details
View details
Only £3.79 with Motoring Club premium
View details
Holts
4.6 / 5 (107)
£4.49
+ Extra 10% off when you spend £30
Use code: PAYDAY10
£4.49
Only £4.27 with Motoring Club premium
View details
View details
Only £4.27 with Motoring Club premium
View details
Holts
4.7 / 5 (38)
£4.99
+ Extra 10% off when you spend £30
Use code: PAYDAY10
£4.99
Only £4.74 with Motoring Club premium
View details
View details
Only £4.74 with Motoring Club premium
View details
Holts
4.0 / 5 (45)
£5.50
+ Extra 10% off when you spend £30
Use code: PAYDAY10
£5.50
Only £5.22 with Motoring Club premium
View details
View details
Only £5.22 with Motoring Club premium
View details
Holts
4.5 / 5 (56)
£7.00
+ Extra 10% off when you spend £30
Use code: PAYDAY10
£7.00
Only £6.65 with Motoring Club premium
View details
View details
Only £6.65 with Motoring Club premium
View details
Loctite
4.5 / 5 (31)
£12.49
+ Extra 10% off when you spend £30
Use code: PAYDAY10
£12.49
Only £11.87 with Motoring Club premium
View details
View details
Only £11.87 with Motoring Club premium
View details
Holts
4.2 / 5 (49)
£15.79
+ Extra 10% off when you spend £30
Use code: PAYDAY10
£15.79
Only £15.00 with Motoring Club premium
View details
View details
Only £15.00 with Motoring Club premium
View details
Online Exclusive
Sealey
£61.99
+ Extra 10% off when you spend £30
Use code: PAYDAY10
Klarna financial company Spread the cost From £3.08 per month
£61.99
Klarna financial company Spread the cost From £3.08 per month
Only £58.89 with Motoring Club premium
View details
View details
Klarna financial company Spread the cost From £3.08 per month
Only £58.89 with Motoring Club premium
View details
Online Exclusive
Laser
£56.00
+ Extra 10% off when you spend £30
Use code: PAYDAY10
Klarna financial company Spread the cost From £2.79 per month
£56.00
Klarna financial company Spread the cost From £2.79 per month
Only £53.20 with Motoring Club premium
View details
View details
Klarna financial company Spread the cost From £2.79 per month
Only £53.20 with Motoring Club premium
View details
Online Exclusive
Laser
£36.00
+ Extra 10% off when you spend £30
Use code: PAYDAY10
Klarna financial company Spread the cost From £1.79 per month
£36.00
Klarna financial company Spread the cost From £1.79 per month
Only £34.20 with Motoring Club premium
View details
View details
Klarna financial company Spread the cost From £1.79 per month
Only £34.20 with Motoring Club premium
View details
Online Exclusive
Laser
£51.00
+ Extra 10% off when you spend £30
Use code: PAYDAY10
Klarna financial company Spread the cost From £2.54 per month
£51.00
Klarna financial company Spread the cost From £2.54 per month
Only £48.45 with Motoring Club premium
View details
View details
Klarna financial company Spread the cost From £2.54 per month
Only £48.45 with Motoring Club premium
View details
Steel Seal
3.7 / 5 (183)
£44.49
+ Extra 10% off when you spend £30
Use code: PAYDAY10
Klarna financial company Spread the cost From £2.21 per month
£44.49
Klarna financial company Spread the cost From £2.21 per month
Only £42.27 with Motoring Club premium
View details
View details
Klarna financial company Spread the cost From £2.21 per month
Only £42.27 with Motoring Club premium
View details
Online Exclusive
Laser
£450.00
+ Extra 10% off when you spend £30
Use code: PAYDAY10
Klarna financial company Spread the cost From £13.09 per month
£450.00
Klarna financial company Spread the cost From £13.09 per month
Only £427.50 with Motoring Club premium
View details
View details
Klarna financial company Spread the cost From £13.09 per month
Only £427.50 with Motoring Club premium
View details

Head gasket repair at home

Repairing a troublesome exhaust or, even worse, a head gasket, can be costly. Thankfully, we’ve got a wide range of exhaust repair kits and head gasket sealants to help experienced home mechanics do the job themselves. Professional mechanics love our products too as they offer a high-quality, affordable solution.

Head gasket symptoms

  • An overheating engine is one of the most common symptoms of a blown head gasket.
  • Your radiator needs to be constantly topped up with coolant.
  • White smoke coming from the exhaust.
  • Bubbling in the radiator or reservoir.
  • Your oil is discoloured and milky.

About head gasket and exhaust sealant

Seal a cracked or blown head gasket with the power of steel by using the high-powered Steel Seal Head Gasket Repair Sealant. You might prefer a pour-in option like this, or you could use a flexible gasket sealant designed to withstand high temperatures and target specific areas. Exhaust silicone sealant cures quickly to provide a permanently flexible seal.

Exhaust repair products

Make repairs to holes and splits with a highly rated, easy-to-fit repair bandage, or useful Holts Gun Gum putty. Buy online or click & collect from your local Halfords store today.