(9 pack) Blue Devil Hydraulic Stop Leak (1 gallon)

How does it work? Blue Devil Hydraulic Stop Leak is a unique plasticizer for all rubber. Shepherd absorbs into the seal to soften expand & revitalize the size and flexibility to its original condition. How much do I use? Use 1 gallon to treat up to 30 gallons of hydraulic fluid. How long does the repair take? Start engine and drive vehicle or equipment to let Blue Devil circulate. The repair is sealed while you drive (up to 2 days drive time).