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PROBLEM TO BE SOLVED : To provide a new composition for a multi-functional coating excellent in gas permeability and hydrophobicity and used as a countermeasure against sick house syndrome and as a countermeasure against heat island phenomenon. SOLUTION : The composition for the coating contains as the effective ingredients a super-porous inorganic substance and a superfine powder material of monazite or bastnaesite that contains the rare earth element from a lanthanum salt.