Opticolor grout is MAPEI’s latest MAPEI has taken the wraps off of Opticolor stain-free grout. Formulated to prevent shading, mottling and staining, the nonsag grout is cleanable by water and offers color consistency for the life of the product, according to MAPEI. Opticolor is offered in three sizes. For details, circle 222 on the Reader Inquiry Card.