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K-Seal ST5516 HD Multi Purpose One Step Permanent Coolant Leak Repair

K-Seal ST5516 HD Multi Purpose One Step Permanent Coolant Leak Repair

Q: how much do i need to pour in a diesel 1 ton cummins

You need this one bottle for a Dodge 3500 hd. I have this one bottle in my HD Freightliner 330hp MBZ engine hauling freight (54,000 lbs cap) 6 days a week and it stopped my coolant leak in the engine bay and heater core with no blockage and no. My opinion, Many reviews say products dont work BECAUSE most people dont take care of their equipment and their vehicles are old, high mileage and no maintenance done. None of the add to a tank products are as good as replacing with new parts but thats expensive, we get it. This may or may not fix your problem but its a low cost gamble with a high probability of success. Dont listen to the negative reviews. If the problem comes back, your damage was too far gone and in need of replacement anyway.

Q: Will this work with aluminum heads?

It works equally well with cast iron or aluminum. Great Stuff. Not a long-term solution, but it will buy you a lot of time.

Q: Tried using alumaseal, which isn't working. will i need to flush the system before using the k-seal?

I used the HD Truck bottle on my 1998 GEO Tracker ( used 1/3 of the bottle ) of K-Seal and it worked. I have used so many to no avail. To answer your question, I must have @ least 3 to 4 other sealers in my colling system when I added K-Seal. It's been almost a year & no adverse effects having not flushed my radiator. Should I have flushed the radiator & the system? Yes, I should have.

Product ID: 729092387

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🚛Heavy-duty commercial grade

⏱️Rapid permanent seal

🛠️One-step easy application

Frequently Bought Together

K-Seal ST5516 Heavy-Duty Multi-Purpose One Step Permanent Coolant Leak Repair, 16 oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required

PEAK 50/50 Prediluted Antifreeze and Coolant for All Engine Cooling Systems

K-Seal ST3501 Pour and Go Head Gasket Sealer, 16oz, Permanent Repair for Blown Head Gaskets, Cracked Heads and Blocks

Description

🚀 Seal leaks fast, drive worry-free forever!

INSTANT LEAK LOCKDOWN - Seals radiator, head gasket, freeze plugs & more in one powerful step.
EFFORTLESS APPLICATION - Just shake and pour—no draining or flushing required, saving you time and hassle.
TRUSTED PROFESSIONAL GRADE - Mechanic-approved, non-corrosive formula that won’t clog your cooling system.
UNIVERSAL COOLANT COMPATIBILITY - Works seamlessly with all antifreeze types for versatile use across vehicles.
BUILT FOR HEAVY DUTY PERFORMANCE - Engineered for trucks, tractors, and industrial vehicles ensuring long-lasting durability.

K-Seal ST5516 HD is a professional-grade, one-step coolant leak repair solution designed to permanently seal leaks in radiators, head gaskets, freeze plugs, and more. Compatible with all antifreeze types, it requires no draining or flushing—just shake and pour. Engineered for heavy-duty vehicles like trucks and tractors, it delivers durable, non-corrosive repairs trusted by mechanics worldwide.

Specifications

ーカー	Solv-Tec
ランド	K-Seal
デル名	ST5516HD
品サイズ	14.99 x 10.41 x 4.83 cm; 531 g
品モデル番号	ST5516HD
ーカーにより製造中止になりました	いいえ
品の寸法　奥行き × 幅 × 高さ	15 x 10.4 x 4.8 cm
品の重量	531 g

Have a Question? See What Others Asked

Does it work on potentially warped heads

how much do i need to pour in a diesel 1 ton cummins

Will this work with aluminum heads?

Tried using alumaseal, which isn't working. will i need to flush the system before using the k-seal?

Common Questions

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

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TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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

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