How much would I need for a cooling system of 8.5 litres?

I think one purchase should be sufficient , just Google and double check.

What long term damage doe's it do to the engine and water system

I used this in a 2004 Rover Streetwise that I bought in 2012. I used as a preventative measure as that particular engine was notorious for headgasket failure and the car is still running in 2022 never having had a problem with the engine except an alternator, so I would say long term damage is ZERO. I have used it in all my cheap runaround cars I have bought as my 3 sons got thier first cars and never had problems with it. Overall it seems to me to be a great product.

Im doing a coolant flush but when i fill the system back up do i fill with plan water or antifreeze to add the k seal

fill system up as normal using antifreeze and add k-seal

How much would I need to use for a 1.2L vehicle? Is it the whole bottle or part of the bottle?

I used 2 for a two litre car and sorted my issue which was a head gasket problem.

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Coolant Leak, 236ml | Multi-use Car Radiator & Head Gasket Repair Sealant

Product ID: 47965944

Details

Brand
K-Seal
Item dimensions L x W x H
8.9 x 3.8 x
Item weight
0.26 Kilograms
Material
Synthetic
Style
Compact

🔧Permanent multi-point repair

⏱️Seals leaks in minutes

♻️Compatible with all coolants

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฿2294

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Description

🚗 Seal the deal fast—because your engine deserves a leak-proof life!

PLUG PLAY SIMPLICITY - Just shake, pour, and run—no mechanic required, no downtime wasted.
UNIVERSAL COMPATIBILITY - Works seamlessly with all antifreeze types and engines up to 12 cylinders—cars and light trucks alike.
FIX IT FAST DRIVE LONGER - Seals radiator, head gasket, freeze plugs & more in just one step—no draining needed.
MECHANIC TRUSTED DURABILITY - Backed by millions sold and ASTM D3147 certification for professional-grade, long-lasting reliability.
ONE FORMULA TOTAL COVERAGE - Unique formula seeks out and permanently seals every crack and hole without harming engine efficiency.

K-Seal Coolant Leak Repair is a 236ml professional-grade liquid sealant that permanently fixes leaks in radiators, head gaskets, freeze plugs, and more. Compatible with all antifreeze coolants and engines up to 12 cylinders, it requires no draining or flushing—just shake, pour, and drive. Trusted worldwide and independently tested to ASTM D3147 standards, it offers a fast, cost-effective, and durable solution to keep your vehicle’s cooling system leak-free and performing at its best.

Specifications

ASIN	B001QT9KO6
Best Sellers Rank	669 in Automotive ( See Top 100 in Automotive ) 5 in Fillers, Adhesives & Sealants
Brand	K-Seal
Colour	clear
Compatible Material	Alloy Steel, Aluminium, Brass, Copper, Engineered Wood, Fibreglass, Polyvinyl Chloride, Stainless Steel, Plastic
Country Of Origin	United Kingdom
Customer Reviews	4.3 4.3 out of 5 stars (13,266)
Global Trade Identification Number	05060002968017
Item Dimensions	8.9 x 3.8 x 11.4 centimetres
Item Form	Liquid
Item Weight	0.26 Kilograms
Manufacturer	K-Seal
Manufacturer Part Number	ST5501
Material	Synthetic Resin
Model Number	ST5501
Number of Items	1
Style Name	Compact
Supported Standards	ASTM D3147
Surface Recommendation	Vent, Countertop, Sink, Wall
UPC	367157659506 812646010004
Unit Count	236.0 millilitre
Water Resistance Level	Water Resistant

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฿2294

Duties & taxes included

In stock

Sold byAmazon ThailandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Thailand.

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