✕DO NOT FORCE THE FIT
- Floor and wet-area tile in thinset. Wrong adhesive class and wrong notch — cementitious thinset wants standing square ridges (19050 for medium tile, 19070 for large/quarry/pavers). A V bead can't hold a floor tile's bed.
- Room-scale spreading. Three inches of edge is a repair-and-detail width; a whole floor or wall of gallons is the 9-inch trowel's job (19030 in this V geometry).
- Sheet resilient goods where the meter telegraphs. Sheet vinyl and VCT want fine U or fine square meters laid almost paint-thin; a 1/4" V is both too open and the wrong ridge shape, and its ridges would read through the finished floor in raking light. Those are the fine-square/U members' jobs.
- The throwaway solvent job. If the adhesive is a solvent-based contact cement you have no intention of cleaning off, the honest tool is the one-piece plastic V (05532), not this carbon blade you'd have to scrub.
- Mosaic and fine tile. A sheet-mounted mosaic drowns over a 1/4" V — adhesive squeezes up through every joint of the sheet. Step down to the fine square (04126) or fine V (19032).