I'm replacing the seal between the UIM and the LIM and I was wondering what would be the best type of sealant to use. Thanks

 

I'm in the process of changing my vacuum hoses, and I'm using Permatex High Temp RTV along with my mazdatrix gaskets. I would suggest not using gasket cement, because it seems the previous owner used it, and it took me almost a half hour a flange to clean off.