Laticrete NXT Patch 25lb Bag - Grey NXT Patch is a premium quality, fast-drying underlayment patch designed for use over most substrates. Features It comes in 25lb bags For use in interior or exterior applications Excellent bond and compressive strength/li> It can be used to float concrete and CMU walls Easy to mix and apply Rapid setting formula Apply finish floor goods in as soon as 40 minutes Can be applied directly over concrete testing at RH of 100% or less per ASTM F2170 Direct replacement for DRYTEK Patch It can be used under VAPOR BAN moisture mitigation The cement-based formula is excellent for deep fills from 1/8" – 1-1/2" (3-38 mm) per lift Approximate Coverage Nominal Thickness Approximate "Coverage 1/8" (3 mm) 28.0 ft2"(2.6 m2) 1/4" (6 mm) 14.0 ft2"(1.3 m2) 1/2" (12 mm) 7.0 ft2 (0.7 m2) ***Coverage will vary depending on the texture of the surface***