Bathroom's Vinyl floor

For all the experts this may be a generic and over used question. After reading all the posts I came to the conclusion that I should use an adhesive with self stick vinyl tiles. When i was at Lowes last week the lady in the floor section told me I don't need an adhesive but the "S-185 Armstrong primer". I bought the primer and the directions say It's only for floor prep. I beleave I still need adhesive. Please advise..Thank-You!

I just bought Armstrong Imperial Texture 12x12 vinyl tile. (This is the commercial stuff that sells at Home Depot for about 63 cents per sq. ft. - comes in about 50 colors) Since it is commercial, you need to go to the website to see the directions. The directions say "do not install over existing below grade tile". We can't take the tile back, we got it at a yard sale 450 sq ft for $50. The problem is that we want to install it in the basement (which I assume means below grade) over what is probably asbestos tile from the 1950's. So that means that we are trying to encapsolate it and are not interested in taking it up. The basement is totally dry, all the time except one small leak (which I could have corrected if I thought about it ) when we had 20 inches of snow on the ground and then 2 solid days of downpours. (20 year flood - which comes about every 5-10 years). So can we put this tile down and on top of the asbestos tile, using the correct adhesive? If this is not recommended then would putting down a thin layer of leveling compound make it feasable? I was thinking that they are saying don't put over tile below grade because they do not want to warrantee it, but that it might actually be OK. Any comments? -cilla