Armor Tile adhesive is not normally needed but is used for areas where there may be expected movement from constant sudden stopping and turning such as from fork lift traffic, or cars in service facilities or where the tiles are free floating as in not locked in by any walls or where the tilesmust be cut for where the 'teeth' cannot be joined, color striping joints, edging, and similar installations. Covers approximately 250 sq ft/gal. 1 part, no mixing."
The image above is of the tile getting glued down, the pipe is weighing the tile down into a drench drain. Holes were drilled into the tile to facilitate draining.
Care must be taken when using adhesive that tiles are installed perfectly square. Use a chalk line or laser line to ensure tiles are being installed square. The best method is to start from front to back laying tiles from left to right. Install about three rows of unglued tiles to ensure tiles line up properly then starting from row 4 and on apply glue to bottom of tiles, glue should be applied in a thin layer to within three inches of the perimeter of each tile, do not cover the entire tile with glue since the glue expands as it dries. Once you have completed the glued rows from row 4 and back remove rows 1,2 and 3 and reinstall with glue. This method ensures you get a perfect installation.