Balsa expands like crazy when it gets wet so I don’t think it would last long outdoors even with a water seal. I would recommend redwood or cedar.

Can balsa wood be used outdoors?

Balsa expands like crazy when it gets wet so I don’t think it would last long outdoors even with a water seal. I would recommend redwood or cedar.

Is balsa wood natural?

Balsa trees grow naturally in the humid rain forests of Central and South America. Its natural range extends south from Guatemala, through Central America, to the north and west coast of South America as far as Bolivia. … The scientific name for balsa wood is ochroma lagopus.