Description Reviews Permatex Ultra Black is what we use in the shop anytime that we need RTV. MINI made all the Gen 2 motors (N12, N14, N16, & N18) use a 1/4 inch bead of RTV to seal up the pan to ensure that there was no oil leaks! 1 tube will be plenty to do an oil pan sealing job with some left over. Just make sure all the parts are clean & dry and that all of the old sealer is off. Lay it on and bolt it together, super easy. Technical Data Sheet