Happy Feet HF9100 adhesive is for use with luxury vinyl and plank, solid vinyl sheet, rubber sheet/tile and vinyl/rubber stair treads. With patented MetaTec technology, it is an adhesive that features high aggressive peel and shear strength. HF9100 is solvent-free and nonflammable. It has 2 size options; 1 gallon and 4 gallons. It can be used on APA registered underlayment grade plywood; terrazzo; existing well adhered tile and sheet goods; radiant heated subfloors where surface temperatures do not exceed 85° F (29.40° C); and above, on, or below grade concrete in the absence of hydrostatic pressure, excessive moisture or alkalinity. For more details about HF9100, please check HF9100 Transitional Pressure Sensitive Adhesive Brochure.