PRONTO ULTRA™ is a fast setting/ fast drying latex modified gypsum based floor underlayment patch. It is used to patch or fill interior wood, above, below or on grade concrete substrates.

PRONTO ULTRA offers compressive strength of 3,000 psi., is moisture resistant and mold/mildew resistant. 

PRONTO ULTRA may be used from feather edge to 1⁄2” thickness.

Features and Benefits

  • Fast setting / fast drying
  • Creamy, grit free
  • Good finishability