HAPCO HEAVY DUTY COOLING SYSTEM
BLOCK SEALER
HIGH TEMPERATURE – HIGH PRESSURE
STOPS EXISTING LEAKS
STOPS FUTURE LEAKS
RUST INHIBITOR
WATER PUMP LUBE
Seals Leaks instantly in all cooling systems. Especially designed for today’s higher pressure systems. Safe for aluminum and plastic unit.
NON-CLOGGING – PERMANENT
DIRECTIONS
1. Flush Cooling System Clean
2. Fill with water or anti-freeze mix and run the engine until water is quite warm
(for larger cracks, where water is streaming out, pack with fine steel wool as tight as possible)
3. Shake Block Sealer and pour into Radiator. Run engine for 15 minutes until the leak stops.
For combustion chamber and head gasket leaks, do not relieve compression.
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MADE IN MICHIGAN