PL®-Stopf is a ready-mixed, swellable, water-impermeable, mineral-based rapid binder mortar according to DIN 18557. PL®-Stopf has a preset open time and is mixed with water only. PL®-Stopf is a WW walling, grouting, laying and repair mortar according to DIN 19573 and is classified as a WW coating mortar DIN 19573 – B2 – XWW3.