super wood is compressed at 2000 lb per sq inch. it has marine formalitie glue in powder form mixed with the wood particle . it sets under pressure and heat . it is very strong and nothing like mdf board only in the fact that mdf is pressed as well with cheep none water proof glue so there fore it will swell when wet and go back to something like wet card board mush. some boat builder are using super-wood in stead of marine ply and when it is covered in epoxy glue and covered with Dacron and then painted it will not rot or take in water and marine bores hate it .