D.L.R. stands for "DEPOSIT-LIME-&-RUST REMOVER"
Viscous, fast-acting deposit, lime, and rust removing cleaner and descaler. Hydrochloric acid fortified to work fast on grout, concrete, brick, chrome, brass, fiberglass, glass, ceramic tile, plastic, porcelain, and stainless steel. Fortified with Acrylic Polymer Technology that protects surfaces and reduces deposit build-up.