a binder slurry for a continuous filament mat used in a phenolic pultrusion system comprising a phenolic compatible silane , a non - ionic surfactant , a defoamer , water , an organic acid and a polyvinyl acetate copolymer binder . the binder slurry resin is unique in that the polyvinyl acetate copolymer binder is compatible with presently available phenolic resins , and as such pultruded parts made have improved surface and mechanical properties as compared with traditional polyester type binder slurries which are not compatible with phenolic resins .