There are a variety of Loc-tite thread sealants. The typical consumer product line has about 3 different sealants. The first level of thread sealant is blue, then a red, and a green that fits in the middle.
The industrial product line has about 4 pages of diffent types, some of which often get into our hands thru places like Brownells, MSC, Rutland, McMaster-Carr, Grainger, etc.
I've used it under the head before, but it was in conjunction with the thread. I see no reason it couldn't be used just under the head if desired. It could be very effective in a counterbored or countersunk head fastener under the head only.
Last edited by Chuck H; 02/10/10 04:35 AM.
