CONSTRUCTION MATERIAL AND METHOD OF ITS MANUFACTURE Russian patent published in 2018 - IPC E04F13/08 

FIELD: construction.

SUBSTANCE: construction material having a seal on the part for the tongue and groove joint. The seal is closed with a seal-covering film. The seal preferably comprises a styrene-based copolymer resin and/or a mixture of an olefin-based resin and an adhesive resin. The method of manufacturing a construction material includes the stage of heating the sealing material to a temperature equal to or greater than the softening temperature of the sealing material, the stage of forming a sphere-like seal by means of applying the heated sealing material on the part for the tongue and groove joint, formed in the main material, and the stage of coating the seal with the seal-covering material.

EFFECT: construction material exhibits a strong cutting ability and adhesion to the part for the tongue and groove joint and is not substantially coloured in case of oil fluid leakage or the like.

9 cl, 1 tbl