UNSANDED CAULK / FOR APPLICATIONS IN BOTH INTERIOR & EXTERIOR MOLD & MILDEW RESISTANT WATER RESISTANT PAINTABLE WITH LATEX PAINT LOW VOC / CONTRIBUTES TO LEED PROJECT POINTS AccuColor Silconized Unsanded Caulk is a smooth, unsanded caulk that is formulated to precisely color-match TEC AccuColor grouts for flawless matching. Forms a tough, flexible, water and weather-resistant seal on most building materials, protecting your installation from moisture, drafts and rot. Contains a special silicone additive to promote greater adhesion and longer life.