2x 10K Boost Car Engine Oil Stop Leak Treatment For Rubber Seals Gaskets\n10K Boost Engine Stop Leak is formulated to help stop leaks caused by seals and gaskets that can shrink or even crack. It will help to expand and revitalise all rubber engine oil seals, including rear main seals, crankshaft oil seals, timing cover seals etc.Important - will not treat mechanically defective or non-rubber gaskets.\nProduct InformationHelps stop leaks caused by seals and gaskets that can shrink or even crack.\nKey Features\n--Helps stop leaks caused by seals and gaskets that can shrink or even crack.\n--Add to engine oil.\n--Suitable for petrol and diesel engines.\n--Formulated to stop oil leaks.\n--Treats rubber seals and plastics.\n--Size: 375ml each can.Also Includes 4TRESS Chrome Tyre Valve Dust Caps (Free)\nThe 4Tress Chrome Tyre Valve Dust Caps screw onto the valve stem of a car tire to protect it from dust and debris. These particular caps have a sleek and stylish design with a 4TRESS emble.