� It is the polymeric from polyether polyol and isocyanate, � It has a strong adhesive force with the broken pieces of the sponge, � It is the professional adhesive for every high-low density renewable sponges, � It has unique characteristic of being speed adjustable, easy to use and non-toxic SPECIFICATIONS OF THE PU BINDER � Colour � Brownish Yellow � Appearance � Liquid Form � Odour � Non Objectionable (Aromatic)