Hi guys I'm building a computer desk with a view to putting epoxy resin on the desk, the material is wallnut laminated or vineered mdf,  the desk top is approx 7ft by 3ft with a lip of 2.5mm all around there's also a black acrylic insert fitted flush in the centre, my question is, does it need sealing all over for epoxy and what would you reccomend and also there are minimal gaps around the edge what would be best for sealing these as iv heard that silicone reacts with epoxy, thanks in advance