Bar's Leaks Rislone 4447 Compression Repair with Ring Seal - 16.9 oz.

Rislone High Mileage 4 6 8 Compression Repair is a concentrated proprietary blend of petroleum additives developed for higher mileage engines that are suffering from decreased or uneven compression.Low compression can be caused by normal engine wear and decreased sealing between the piston rings and cylinders walls.'