Blok-Guard & Graffiti Control VOC 15 (formerly called Blok-Guard & Graffiti Control Ultra 15) is a high-performance, clear, solvent-based silicone elastomer formulated to weatherproof concrete block and other porous masonry materials, like brick, unglazed terra cotta, porous tile, concrete and some natural stones. Blok-Guard & Graffiti Control VOC 15 protects masonry surfaces from repeated graffiti attacks with little to no change to the natural appearance.

Blok-Guard & Graffiti Control VOC 15 (formerly called Blok-Guard & Graffiti Control Ultra 15) is a high-performance, clear, solvent-based silicone elastomer formulated to weatherproof concrete block and other porous masonry materials, like brick, unglazed terra cotta, porous tile, concrete and some natural stones. Blok-Guard & Graffiti Control VOC 15 protects masonry surfaces from repeated graffiti attacks with little to no change to the natural appearance.