Metalux Direct To Metal Filler Primer is a non-isocyanate, chromate-free filler that may be applied directly to large areas of bare metal without the need of applying an etch filler first. When used as a medium or high build filler (surfacer), DTM offers excellent corrosion protection on bare metal and OEM substrates, that easily sands by hand or machine. Used as a non-sanding sealer for one and two panel repairs, DTM offers superior colour holdout and gloss retention for fast, high quality finishes.