K-Seal ST9501 K-Seal Multi-Purpose One-Step Permanent Coolant Leak Repair

K-Seal (700) (700) K-Seal Multi-Purpose One-Step Permanent Coolant Leak Repair Permanent Coolant Leak Repair! Safest coolant "stop leak" on the market-Will not damage cooling system or engine. Positively will not clog. Seals leaks up to 0.025. 1/32". 0.793mm and seals in minutes. Repairs head gaskets, blocks, heads, heater cores, water pump casings (including hardened polymer) and freeze plugs. No draining, flushing or specialty tools. Can be added to cold, warm or hot engines. Meets ASTM D3147. Just shake and pour into rad or coolant reservoir. Freeze-proof formula. One bottle treats up to 20 litres.