You really want to seal the surface and edges of MDF.
It has a tremendous affinty for water and will swell up in moderate humidity if not sealed with a polyurethane sealant or something like that, even if you cover it with a vinyl sheeting. Even a spray can or three of a polyurethane sealant will do good enough.
It has a tremendous affinty for water and will swell up in moderate humidity if not sealed with a polyurethane sealant or something like that, even if you cover it with a vinyl sheeting. Even a spray can or three of a polyurethane sealant will do good enough.