The Seca Co. Ltd. Slate specialists since 1984 Who are we Roofing Slate. Slate Tiles. Other Slate Products. For inquiries, questions or comments please send us e-mail. The Seca Co. Ltd. Pl. Joan Cornudella 22-A, 6 , 2 , 08035 Barcelona - Spain. Telephone +34.93.428.6247. Fax: +34.93.428.2138 /+34.93.205.4094 ...