Gypsum panel having UV-cured moisture resistant coating and method for making the same

A gypsum panel comprising:

• a gypsum core having a planar first face and a second face;
• a fibrous facing material adhered at least to the first face by gypsum in the gypsum core at least partially penetrating into the fibrous facing material;
• a high energy radiation cured coating of a radiation curable formulation on the fibrous facing material, wherein the radiation curable formulation is essentially free of water, and comprises
• at least one high energy radiation curable polymer having ethylenically unsaturated double bonds, and
• at least one high energy radiation curable reactive diluent;
• and
• an aggregate material on and/or in the high energy radiation cured coating,
• wherein the at least one high energy radiation curable polymer having ethylenically unsaturated double bonds is urethane acrylate oligomer or epoxy acrylate oligomer and the at least one high energy radiation curable reactive diluent is hexanediol diacrylate.