K&W 401224 FiberLock Head Gasket & Block Repair - 32 Fl Oz
Key features
- •Easy Pour and Go Formula!
- •Permanently fixes head gaskets, engine blocks, cooling systems, and cylinder heads.
- •Seals larger holes with less fluid loss than competitive products as proven by lab test (ASTM D6107)
- •Works with all antifreeze or plain water.
K&W 401224 FiberLock Head Gasket & Block Repair - 32 Fl Oz
List Price: $64.03$57.63DEALYou Save: $6.40 (10%)
Free shippingFree Returns – 30 daysFree Order CancellationSecure Payment2–3 Days DeliveryGet It June 22, 2026In Stock (23)No marketing spamNo account requiredFulfilment by FedEx / Amazon / UPS / ShipwirePayPal / Card Buyer Protection
Customer Reviews
Reviews sourced from verified Amazon purchasers3.3
out of 5
Based on 10 reviews
5★
0%
4★
30%
3★
10%
2★
40%
1★
20%
Not safe to use without a factory seal on the bottle
Martin✓ Verified Purchase•August 24, 2017
Item arrived without a seal on the bottle, can not trust what's inside the bottle.
Two Stars
oledia henson✓ Verified Purchase•July 7, 2017
waste of money
k&w works on minor leaks but don't waste your time and money on major ones
the wrench✓ Verified Purchase•June 1, 2017
sealed a damaged head gasket and or cracked head the was leaking very slightly where it would get tiny air bubbles in the radiator. temperature was running at 50% means (needle half way on gauge) with out thermostat and electric fan on full time so basically still drivable. it was a 3 cylinder diesel engine. after adding this according to instructions it stopped the bubbles and temperature down to 25%. it did clog the radiator a few hours and drive cycles later but it was flushable. I only used 1/3 bottle maybe even a little less. running it 1 month still good. however i tried it on a Toyota 22r engine with a severe head gasket case where water would enter the oil and compression into cooling system. it didn't work. it tried to for a few seconds or a minute things sounded better but didn't work even after second application. I even tried removing the spark plug on 1 of the bad cylinders to see it that would help give it time to seal with out the extra compression blowing out but it failed to work. basically it works on minor leaks but not major ones. save your money on the major leaks which is as expected.
Two Stars
Richard✓ Verified Purchase•April 20, 2017
It didn't work
use only as a last resort
W. Smith✓ Verified Purchase•March 25, 2017
Use only as a last resort. It caused a clog up in my coolant system.
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