What would be the expected additional cost to use a water based sealer for our hardwoods instead of polyurethane? It's about 1300 sq ft and we are using white oak. The quote we received seems really high just to switch sealers. Prior to asking about the water based sealer our quote for hardwoods is at $8700. They're adding on $1300 to use the water based. Can anyone with knowledge tell us if this is reasonable?