Astor Okerin 143A Microcrystalline wax 64742-43-3 Honeywell Waxes & Paraffin >> Microcrystalline ADHESIVE >> Hot-melt ADHESIVE >> Solvent based Okerin 143A is an amber high quality microcrystalline wax ideally suited for laminating applications in foodstuffs and general purpose packaging.Laminates produced with OK 143 shows excellent initial seal strength, good resistance to aging and are resistant to strike through at high ambient temperatures. High quality microcrystalline amber wax. Used in hot melt and solvent borne adhesives. Provides very good initial seal strength, good resistance to aging and resistance to strike through at high ambient temperatures.