SHAMROCK TECHNOLOGIES › HYDROCER™ 303 HYDROCER™ 303 $0.00 SHAMROCK HYDROCER™ 303 is a 35% aqueous dispersion of a special blend of polyethylene waxes. Quantity: Add To Cart Added! SHAMROCK HYDROCER™ 303 is a 35% aqueous dispersion of a special blend of polyethylene waxes. You Might Also Like HYDROCER™ 8481 HYDROCER™ 357 HYDROCER™ 135 HYDROCER™ ASTRO AE 25 F HYDROCER™ AE PW