2.5 Gallon, Thin Set Mortar Admix, Pre-Mixed, No Diluting Necessary, A Liquid Polymer Designed To Be Used In Place Of Water To Increase Performance Of Cement Mortar Beds, Non-Modified, Thin Set Mortars and Cement Based Grouts, Improves Working Characteristics and Performance Of Cement Based Mixes To Boost Water Resistance, Shock Resistance and Freeze Thaw Capabilities For Tile, Stone Or Masonry Installations, Increases Performance Of Non-Modified Thin Set Mortars For Setting Dense Tile and Setting Over Hard To Bond Surfaces.