When people ask me if stop leak products work, my answer is probably not but it ultimately depends on the situation. Overall I do not believe in miracle fluids. Even though I’m a nonbeliever there is some scientific stuff in these fluids that could work in the right situation.
Something I feel works a little better than something you can pour on the inside to stop a leak is something that you could spray on the outside to stop this leak. But remember whenever you have a choice between replacing a leaking gasket or using a stop leak solution of any kind the replacement of the gasket or seal is always going to be the better longer lasting auto repair.
The first time I used spray and seal from Permatex (available below along with a few other popular stop leak products) was for an oil leak on my 2004 Chevy Blazer. I have discussed this particular leak in depth and you can read that article on my page about Chevrolet oil leaks. To make a long story short the leak was at the front timing cover where it met the oil pan.
I used the Permatex spray and seal to help save my driveway until I had time to perform this major repair on my blazer. Being familiar with this type product I knew that the most important part about it being successful was cleaning the surface. Continue reading