DuxxBak decking are mineral-based composite decking products that boast the lowest moisture-absorption rate of any composite product in the decking industry—lower even than cellular PVC. Experience products scientifically formulated to make your deck impervious to rain, sun, wind, heat, cold, and salt. Your deck will retain its luster, beauty, and structural integrity long after others have swelled, crumbled, cracked and warped under the blistering effects of nature.