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Antifreezes & Coolants

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Silverhook Fully Concentrated Antifreeze O.A.T. - Red provides all year round protection for up to 5 years. It is suitable for all types of engines including aluminium. Featuring Organic Acid Technology (O.A.T.) the antifreeze prevents rust and corrosion and will also cool the engine. Freeze Protection: -36°C at 50% dilution.Summer protection: 130°C at 15 PSI and 50% dilution. Passes BS 6580:2010.Size: 4.5 litre.PTDD/ISHAR4
Price from £15.22 up to £23.83 
Compare prices and buy Silverhook SHAR4 Fully Concentrated Antifreeze O.a.t. Red 4.5 Litre D/ISHAR4
£15.00
£19.00
£24.00
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Silverhook Fully Concentrated Antifreeze O.A.T. - Red provides all year round protection for up to 5 years. It is suitable for all types of engines including aluminium. Featuring Organic Acid Technology (O.A.T.) the antifreeze prevents rust and corrosion and will also cool the engine. Freeze Protection: -36°C at 50% dilution.Summer protection: 130°C at 15 PSI and 50% dilution. Passes BS 6580:2010.Size: 1 litre.PTDD/ISHAR1
Price from £4.21 up to £8.11 
Compare prices and buy Silverhook SHAR1 Fully Concentrated Antifreeze O.a.t. Red 1 Litre D/ISHAR1
£4.00
£6.00
£8.00
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Silverhook SHA4 Concentrated Antifreeze - Blue 4.54 Litre Antifreeze coolant is one of the most vital fluids in your car'soperation, since it...
Price from £14.60 up to £23.49 
Compare prices and buy Silverhook SHA4 Concentrated Antifreeze - Blue 4.54 Litre D/ISHA4
£15.00
£18.00
£23.00
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Silverhook Stop Leak for Radiators quickly finds and permanently seals radiator leaks. It is formulated to inhibit the formation of rust and corrosion to help prevent further leaks. It is made from a blend of surfactants corrosion inhibitors and sealants. Stop Leak for Radiators may be used with antifreeze and is harmless to rubber hoses gaskets and gasket cements. It is suitable for petrol and diesel engines. Size: 325mlPTDD/ISGA15
Price from £3.11 up to £7.01 
Compare prices and buy Silverhook SGA15 Radiator Stop Leak 325Ml D/ISGA15
£3.00
£4.00
£7.00
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Over time the build-up of sludge and rust can impair the performance of cooling systems. This can lead to blocked coolant channels and subsequent overheating and increased pressure. Silverhook Radiator Flush effectively clears blockages and removes any sludge and rust accumulation. May be used with all radiator types and is harmless to rubber hoses and gaskets.PTDD/ISGA14
Price from £3.13 up to £7.06 
Compare prices and buy Silverhook SGA14 Radiator Flush 500Ml D/ISGA14
£3.00
£4.00
£7.00
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Silverhook Engine Stop Leak counteracts the effects of seal shrinkage. Older and higher mileage can develop consistent signs of engine oil loss. This can be caused by rubber seal shrinkage due to age dryness and consistent temperature changes.Engine Stop Leak contains seal conditioner additives to help correct external rubber seal related engine oil leaks and can be left in the system offering long-term protection.PTDD/ISGA09
Price from £4.66 up to £15.00 
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£5.00
£6.00
£9.00
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The Sealey Propylene Glycol Antifreeze Disc Tester is a specialist diagnostic tool designed for testing modern propylene glycol-based coolant systems. This lightweight tester provides quick and accurate assessment of antifreeze protection levels in both hot and cold engine conditions, making it an essential tool for workshops, mobile mechanics and vehicle maintenance professionals. The disc flotation system offers a straightforward visual indication of coolant protection levels. When a coolant sample is drawn into the tester, the number of large coloured discs that float directly corresponds to the level of freeze protection, with results referenced against the easy-to-read temperature table …
Price from £10.44 up to £14.95 
Compare prices and buy Sealey Propylene Glycol Antifreeze Disc Tester AK4122
£10.00
£12.00
£15.00
£15.00
£15.00
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The Sealey Ethylene Glycol Antifreeze Pocket Ball Tester is a compact diagnostic tool designed for testing the freeze protection level of ethylene glycol antifreeze mixtures. This pocket-sized tester provides quick and accurate readings, making it ideal for mechanics, vehicle technicians and mobile service engineers who need reliable coolant testing capabilities. The tester uses a simple floating ball system to indicate freeze protection levels. When a coolant sample is drawn into the unit, the number of coloured balls that float provides an immediate visual indication of the antifreeze concentration. An easy-to-read temperature reference table printed directly on the body allows users to quickly …
Price from £5.49 up to £6.95 
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£5.00
£5.00
£6.00
£7.00
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The Sealey AK413 is a professional antifreeze tester designed for checking ethylene glycol strength in vehicle cooling systems. This tube-type tester enables mechanics and technicians to accurately assess coolant concentration in radiators and header tanks, helping to ensure optimal engine protection against freezing and overheating. Featuring tube construction, the AK413 incorporates an integrated thermometer that allows for temperature calibration during testing. This ensures more accurate readings by accounting for temperature variations that can affect coolant density measurements. The lightweight design, weighing just 0.12kg, makes it easy to handle and store in the workshop. Ideal for …
Price from £8.64 up to £14.13 
Compare prices and buy Sealey AK413 Antifreeze Tester Tube Type
£9.00
£13.00
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The Sealey AK4120 is an ethylene glycol antifreeze tester designed for checking the condition and protection level of engine coolant in both hot and cold conditions. This simple yet effective tool uses a hydrometer-style design with six large coloured discs that float in the coolant sample to indicate the freeze protection level. The tester features a tough, virtually unbreakable plastic body with an easy-to-read temperature table printed directly on the unit, allowing mechanics and vehicle technicians to quickly assess coolant strength without complex calculations or external reference charts. Simply draw a sample of coolant into the tester and count the number of floating discs to determine …
Price from £10.44 up to £15.33 
Compare prices and buy Sealey AK4120 Ethylene Glycol Antifreeze Tester
£10.00
£14.00
£15.00
£15.00
£15.00
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The Sealey AK409 is a dial-type antifreeze tester designed for testing ethylene glycol strength in vehicle cooling systems. This essential diagnostic tool features a temperature adjustment scale that enables accurate interpretation of coolant mixture strength, making it suitable for professional workshops and garages where precise readings are critical for engine protection. Built with a composite body and rubber bulb, this antifreeze tester delivers the workshop durability that mechanics and vehicle technicians require. The robust construction withstands the demands of daily use in busy automotive environments whilst maintaining reliable performance. The AK409 provides the flexibility to test …
Price from £5.96 up to £12.08 
Compare prices and buy Sealey AK409 Antifreeze Tester Dial Type
£6.00
£6.00
£6.00
£10.00
£12.00
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Capacity [litre]: 1,5; Colour: violet; Container Type: Bottle; Properties: Concentrate; Operating temperature from [°C]: -36; Specification: G13, PN93/C-40008-10, ASTM D5931-13, ASTM D1287-11, PN 93/C-40008-05; Vehicle type: Car; Liquid: ; Version: MS-G13+; Oil Fill Quantity [l]: 18,0, 21,0, 33,0, 35,0, 81,0, 55,0, 42,0, 25,5, 16,0, 20,0, 50,0, 80,0, 38,0, 26,0, 64,0, 44,0; Construction Year from: 01/2000, 01/2006, 01/2008, 01/2005; Construction Year to: 01/2006, 01/2009, 01/2008, 01/2013, 01/2016
Price from £6.78 up to £6.99 
Compare prices and buy MASTER-SPORT 91301G132 Antifreeze Premium violet, Capacity: 1.5l
£7.00
£7.00
£7.00
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Specification: ASTM D3306, G11, BS 6580:1992, UNE 26-361-88; Container Type: Bottle; Capacity [litre]: 1; Liquid: ; Properties: Ready mixed; Operating temperature from [°C]: -35; Colour: blue; Colour: red; Product line: Qualifier; Model Year to: 2000, 2018; TecDoc Engine Number: 15530, 12510, 12511, 15788, 16131, 16163, 20833, 18945, 18517, 24624, 26941, 26636, 31786, 33885, 34059, 34436, 34657, 41096; Vehicle Equipment: for vehicles with extended service intervals; Engine Code: 55273835
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