325Ml Rad Stop Leak - No 31197

Rislone has millions of tiny particles to permanently seal internal and external leaks in plastic, aluminum and metal radiators, healer cores, blocks, heads, gaskets, and freeze plugs For preventative maintenance, use once a year to help guard against future leaks. Rislone Stop Leak Concentrate is compatible with both conventional green (silicate-based) and extended life red/orange or yellow (OAT) antifreeze. Dosage: One bottle treats 6 and 8 cylinder engines or hard to stop leaks on 4-cylinder engines.