Interlux YMA715/QT Flattening Agent for 1-Part Finishes - Quart
The Interlux Flattening Agent gives you the freedom to create a variety of gloss, satin or matte effects. It can be mixed with Interlux 1-Part Finishes (Brightside Polyurethane and Yacht enamels) and varnishes (Schooner Gold, Schooner, and Original) to produce the finish you're after.