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 & Cement Based Grouts, Improves Working Characteristics & Performance Of Cement Based Mixes To Boost Water Resistance, Shock Resistance & Freeze Thaw Capabilities For Tile, Stone Or Masonry Installations, Increases Performance Of Non-Modified Thin Set Mortars For Setting Dense Tile & Setting Over Hard To Bond Surfaces.