SAV-A-BRUSH Brush Restorer, Powder Paint brush restorer gives new life to old brushes, cleaning paint-hardened brushes right down to the heel. Simply disolve in water and soak bristles for 24-48 hours. Use with the Warner Brush Comb to help loosen paint in the filaments. Not recommended for badger, sable, camel, bear hair, white bristle or artist brushes.