... .Good property waterproof,damp-proofing,moth-proofing,mildew-proofing,UV-proof,maintenance-free,long-life to use(up to 20 years ... 10densityg/cm3/0.826 11Changes in the shape of the high and low temperature//Put the item in the Environment -24 ... 15tensile-strength(portrait direction)Mpa/13.4 8.Factory showing high quality polystyrene wood panel use for making backyard fence ,waterproof wood ...