Briwax shellac sanding wood sealer 500ml briwax bw4801000000 p this sanding sealer from briwax has been designed for under shellac finishes like french and button polish it is also the ideal sealer under wax polish to produce a higher shine which does not sink away manufactured from natural shellac without any fillers it is easy to apply with brush or rag is fast drying and can be overcoated in just 30 minutes p briwax bw4801000000 shellac sanding wood sealer 500ml