Ipe does not need any "sealer" in fact the wood is dense, that it doesn't really take sealer anyways. The products used on Ipe are not really sealers as much as UV protectants. It is the sunlight that turns Ipe grey, and using these products can help protect against that. However, we do recommend sealing the ends of the boards. The part where the grain is exposed can split easier if not sealed. We do this on most orders at the mills prior to shipping, But if you cut the boards take this into consideration.