Interlux Flattening Agent for Two Part Polyurethanes Interlux Flattening Agent is a flattening agent used to reduce the gloss of Perfection, Interspray 900, Interspray 800 and Interthane Plus when applied to decks, spars, masts and on surfaces where a less than high gloss finish is desired. Finish Matte WILL SHIP GROUND ONLY TO THE CONTIGUOUS 48 STATES ONLY How to Apply HOW TO APPLY FLATTENING AGENT FOR TWO PART MARINE POLYURETHANES APPLICATION METHOD Conventional Spray It is recommended that re