Polyurethane primer should have sufficient capacity to adequately cover surfaces and be fast-drying, as these layers must be sanded before applying the final topcoat.
The main function of these polyurethane primers is to fill and seal the pores or small imperfections that the wood may have, with the aim of achieving uniform and level surfaces. As a general rule, these primers should be formulated with agents that facilitate sanding with maximum transparency if they are clear varnishes, and with maximum elasticity so they don’t crack if they are white varnishes.
Polyurethane primer should have sufficient capacity to adequately cover surfaces and be fast-drying, as these layers must be sanded before applying the final topcoat.
