PermaBond 880 is the latest generation of non-re-emulsifiable vinyl acetate polymer. It provides a “chemical key” between new and old cement, eliminating the need for hacking or scavelling walls, ceilings or floors. When added to sand/cement mortar (render or plaster), it will increase flexibility, tensile strength, impact and abrasion resistance. PermaBond 880 also increases the acid and alkali resistance of concrete and mortar.