Review on Permatex 56521 Performance Thread Sealant by Patrick Lets

Only used on the axle bleeder valve which I replaced to keep water out as I didn't want to use teflon tape on these threads. will use it the next time you change the differential fluid for the fill and drain plug threads. It might be an exaggeration, but hey, it can't be right. Although I didn't try or need to to use this house installation.