Rick's Free Auto Repair Advice

Posts Tagged: oil stop leak

Oil stop leak products — Do they work?

Oil stop leak products work sometimes, but can actually make some leaks worse Most oil stop leak products are made from one of two base products: heavy naphthenic or glycol ethers.  Heavy naphthenic products soften hardened rubber seals and gaskets, making them more pliable. Glycol ethers, on the other hand, cause rubber seals and gaskets to soften and swell. That’s how they work; by softening and swelling rubber seals, not by plugging the leak with particles, like most radiator sealing products.   But do they work? Over time and with … Read More


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