P 90 Resin Alkyl phenol formaldehyde novalak resin Akrochem Tackifier >> Phenolic P-90 is an alkyl phenol formaldehyde novalak resin. P-90 is a tackifier. It is compatible with most elastomers. It finds its widest usage in piled-up constructions which require high building tack levels. Alkyl phenol formaldehyde novalak resin. Used as a tackifier. Offers conpatibility with most elastomers. Used in piled-up constructions which require high building tack levels.