I want to put some new peel and stick tile down over the existing peel & stick tiles that's already there. The guy at Lowe's advised me to use Henry Bond Enhancer but the directions on the back doesn't say if this could be used on tile. Please help me.

Adviseable to use the primer, may not be necessary but can't hurt. Will make new tiles adhere better.

Make sure the tiles are very clean and then put the primer on, it will help adhesion.

If existing tile is not smooth, the new tile will take on some of the ungulations of old tile.

Chuck