Antique andVery rare Soldax-Bloc CAN Repair of cracks and porosities in engines, from the House RIGUPAR PGP in Hospitalet (Barcelona) dated about 1950. Soldax Block was presented as a product to avoid making welds on the engine, a liquid with which cracks or pores were filled and "supposedly" by chemical reaction hardens by clogging those cracks or pores.
