The box is not waterproof, at the Innlet that does not work well. One needs to pond liner (0.5mm 5.80) and a little silicone. Trim the pond liner and attached to the inner sides (not the lid). Secure the lid with silicone seal clean; finished. He stood now since 27.03. 2015 out in the rain; Conclusion: tight, except for a few drops when opened.
