SHAMROCK TECHNOLOGIES › HYDROCER™ 303 HYDROCER™ 303 $0.00 SHAMROCK HYDROCER™ 303 is a 35% aqueous dispersion of a special blend of polyethylene waxes. Add To Cart Added! SHAMROCK HYDROCER™ 303 is a 35% aqueous dispersion of a special blend of polyethylene waxes. You Might Also Like HYDROCER™ ASTRO AE 25 F HYDROCER™ 59 HYDROCER™ AE 35 FG HYDROCER™ DP 69 HYDROCER™ ER 77