Lucas Oil 10279 Engine Oil Stop Leak - 1 Gallon | High-Performance Oil Leak Repair for Cars & Trucks | Fixes Engine Seals & Gaskets | Ideal for Daily Drivers & High-Mileage Vehicles

This product works well for non pressurized rubber seals that are dry but not yet broken like valve cover gaskets, vvt solenoid seals, crank seals, cam seals, etc. probably not very effective on pressurized oil seals like oil filter adapter housings. Will absolutely not work on head gaskets because those are metal not rubber so don’t be stupid. I used on a Cadillac North Star I own with many dry rubber seals and it works fantastic and quiets the engine. My car has lots of dry oil seals that I have no interest in fixing all of them and this product is very effective. I use 10 percent approx 10 percent concentration.