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Oct
Kw Block Seal Oreillys. It is supposed to fill a crack in a block. KW Block Sealer. This is often a great option to consider if repairing the engine does not seem feasible or appropriate. CRC acquired KW in 1999 with its leading automotive brand names.
50 out of 5 stars Saved me 1800 plus machining costs. Jan 12 2002 Posts. 8 and 1 hour work per year is not bad though. Still recommend it fully. 46 out of 5 stars 5 ratings. After long use the KW sealer does not do the job fully and I need a new shot.
This sealer is very tacky and will seal most cracks and gaps including some larger gaps that bigger brands cannot handle.
You can use this sealer in all metal parts plastic parts and painted surfaces. The mixture is then added to the radiator top off the remainder with some water. Block seal creates a permanent molecular bond thats as strong as steel. Seals cracks holes in cast iron aluminum engine blocks head gaskets freeze plugs copper aluminum bi-material radiators heater cores. KW Permanent Metallic Block Seal Head Gasket Repair 16 Wt Oz Brand. Start the engine and let it run for a few minutes.