CONCRETESoundBlok

GRAMM CONCRETESoundBlok® noise barriers are made of a proprietary material consisting of organic softwood shavings (wood-crete) processed to an acoustically engineered size and bonded together under pressure with low carbon cement. GRAMM CONCRETESoundBlok® is highly sound absorptive, porous, rigid, non-combustible, thermally insulating and freeze-thaw resistant.