How does it work?
White Shepherd Oil Stop Leak works while you drive. White Shepherd absorbs into the seal to soften, expand & revitalize the size and flexibility to its original condition.

How large of a leak does it repair?
White Shepherd will seal leaks in any fluid systems that are seeping or dripping.

How much do I use?
One bottle treats 4 to 6 quarts of motor oil.

How long does the repair take?
Start engine and drive vehicle or equipment to let White Shepherd circulate. The repair is sealed while you drive (up to 2 days drive time).

How long will the repair last?
White Shepherd is a permanent repair!

Can I reapply White Shepherd?
YES. White Shepherd does not contain petroleum distillates, which can destroy seals after temporarily expanding them. It is safe to repeat treatment if other seals leak in the future.