Can this product be used on Marine Diesel engines ?

Did this help your marine engine? I’ve a suspect head gasket / maybe a cracked block

can this be used in a central heating system with large volumes of water/coolant? and is it heat curing or air curing?

Yes it can be used in a central heating system it will last for about two months.

What colour is it please

Clear I think, be very careful using g this product it costs me several hundred pounds to put car right, it didn't stop leak but the tiny molecules gold color completed blocked my heating system took several back flushes to unblock and replace sensors in top up tank completely clogged the sensor points set hard. Still traces if it now in coolant 3 months on

Do you need to remove some coolant before putting in. I have a tiny drop but the sensor keeps going off?

Not unless it’s totally full no. If you’re on empty this whole bottle will only fill a tiny bit of your system. Check your vehicle handbook for how much coolant it takes to fill your system and calculate what the difference is, then you will know what the bottle will fill without risking overflow or damage from excess fluid.

K Seal Hd Coolant Leak Repair 472ml Hgv Radiator Block

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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€ 59.54

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered 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 Croatia.

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Description

🚀 Seal leaks like a pro—fast, permanent, and hassle-free!

ONE STEP MAGIC - No draining or flushing required—just shake, pour, and go for effortless leak repair.
ENGINEERED FOR GIANTS - Designed for heavy-duty vehicles and large engines—trusted by pros for commercial & agricultural use.
PERMANENT PEACE OF MIND - A lifetime engine repair that won’t clog or corrode—boost your vehicle’s reliability and performance.
FIX IT FAST DRIVE FASTER - Seals radiator, head gasket & block leaks in minutes—get back on the road without delay.
SCIENTIFICALLY PROVEN MECHANIC APPROVED - Independently tested to ASTM D3147 standards and trusted worldwide by millions.

K-Seal HD Coolant Leak Repair is a 472ml professional-grade sealant designed to permanently fix leaks in heavy-duty vehicle cooling systems, including radiators, head gaskets, blocks, and more. Its unique one-step formula works within minutes without draining or flushing, compatible with all antifreeze coolants, and is independently verified to meet ASTM D3147 standards. Trusted by mechanics worldwide, it offers a durable, non-corrosive solution that enhances engine reliability and performance.

Specifications

ASIN	B004W6I7MQ
Best Sellers Rank	28,626 in Automotive ( See Top 100 in Automotive ) 243 in Fillers, Adhesives & Sealants
Brand	K-Seal
Customer Reviews	4.3 4.3 out of 5 stars (528)
Date First Available	26 Mar. 2010
Guaranteed software updates until	unknown
Item Weight	520 g
Item model number	K5516
Manufacturer	K-Seal International Limited
Manufacturer part number	K5516
Model	K-Seal HD Coolant Leak Repair
Package Dimensions	19.3 x 10.67 x 4.83 cm; 520 g

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

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Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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€ 59.54

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered 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 Croatia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Imran F.

Very reliable shop with genuine products. Will definitely buy again!

2 weeks ago

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

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K-Seal HD Coolant Leak Repair, 472ml | HGV Radiator, Block & Head Gasket Sealant

Description

Specifications

Common Questions