NU-BRITE restores stained and discolored acoustical tile to a like-new condition. It eliminates the need for costly ceiling tile replacement. NU-BRITE does not affect acoustical properties. It is excellent for both smooth and rough surfaces. NU-BRITE will not cause warp or sag. Its coating is non-flammable when dry and does not change the fire rating of the tile on which it has been applied.