We provide special kunststoff -plastic- profiles made of PVC of concave shape with silicone ends and a base guide with template of heavy type aluminium, with which the internal corners of the cold rooms are covered up tightly, as it is imposed according to the specifications of the European Union for the practical and easy cleansing of the cold rooms and the avoidance of the, microbe, salmonella and parasite concentration, that have a detrimental effect on the cleanness of the cold room.