ICT MatteMax | Matte Additive for ICT Reactive Sealers and Low-Sheen Concrete FinishesSheen control. Surface strength. Long term durability. When youre building concrete countertops, sinks, furniture, or tile, the finish matters as much as the form. Too much shine can cheapen the look, too little protection can shorten the life. ICT MatteMax gives you control. What it doesICT MatteMax is a matte additive designed specifically for ICT Reactive Sealers. It allows you to dial in a consistent, low sheen finish while increasing surface