Abstract: A process is provided herein for coating a preformed, porous base material comprising a mineral fibrous or particle material or an organic fibrous or particle material or mixtures thereof to provide a novel preformed base material. The process comprises applying at atmospheric pressure a coating of a vulcanizable elastomeric material in unvulcanized form to a surface of such preformed, porous base material. The elastomeric material is permanently adhered to the preformed porous base material by a hot press, hot vulcanization step. In this way the elastomeric material is substantially simultaneously both adhered securely to one outer surface of the base material and is penetrated and impregnated below and into the same surface of the base material to be within the porous structure of the base material, and is vulcanized therein in situ by the joint action of a pressure of about 50 to about 500 Newton/cm.sup.2 at a temperature of about 120.degree. C. to about 300.degree. C.

Abstract: Weather-resistant boards are provided herein which are possessed of surface elasticity and pliancy by means of a permanently elastic, covering layer (for example, particle boards, facade covering boards, and wall elements) and mouldings (for instance, containers, vessels, prefabricated building elements, and roof elements), the base material being lignocellulose or other organic materials and/or inorganic materials, either as fibres or as particle materials. Such weather resistant boards consist of three layers. The first layer is an impregnatable porous, base material as defined above. The second layer is a vulcanized outer covering layer constituted by an vulcanized, weather-resistant resilient synthetic elastomeric material which has been vulcanized therein in situ at a temperature of at least 175.degree. C.

Abstract: Weather-resistant boards possessed of surface elasticity and pliancy by means of a permanently elastic, covering layer (for instance, particle boards, facade covering boards, and wall elements) and mouldings (for instance, containers, vessels, prefabricated building elements, and roof elements) of resin-impregnated wood fibres or other organic materials and inorganic materials, either as fibres or as particle materials are provided herein. Such weather resistant board comprises three layers. The first layer is an impregnatable, porous, base material which is constituted by a mixture of a curable resin with an organic base material, namely a lignocellulose fibrous or particle material, and an inorganic mineral fibrous material. The second layer is an outside elastic covering layer constituted by a vulcanized, weather-resistant resilient synthetic elastomeric material vulcanized thereon in situ at a temperature of at least 175.degree. C.