- Permanently fixes head gaskets, engine blocks, cooling systems, and cylinder heads.
- Contains 3 unique technologies.
- Military-Strength Fibers create multi-layer repair over cracks with a web-like weave.
- Nanotechnology permanently fixes the smallest cracks and crevices.
- Cool-X Conditioner – lowers operating temperature as it circulates through cooling system.
- Seals larger holes with less fluid loss than competitive products as proven by lab test (ASTM D6107).
- Works with all antifreeze or plain water.
DIY Skill Level: Easy
Pour & Go
Nano Tech
Permanent Repair
30 Minute Repair
Est Cost
$30-$40
Est Savings
$800 to $1500
Double Money Back Guarantee
K&W FIBERLOCK is compatible with all antifreeze or plain water (generally for racing applications).
Shake bottle vigorously for 30 seconds, pour recommended treatment ratio directly into the radiator VERY SLOWLY, turn heater on high and idle engine for 15 minutes. You’re ready to drive. FIBERLOCK will form a permanent repair over time. Read label for complete instructions.
K&W User Testimonials
