Siporexn.

1938 Trade Marks Jrnl. 27 July 913/1 Siporex 583, 757. Slates, bricks, blocks, beams, piles, pillars, posts, tiles, pipes, drains and shaped pieces, all made of cement or concrete for use in building or construction. Internationella Siporex Aktiebolaget..Sweden..24th February 1938.

1943 Archit. Rev. 94 68/1 The Mässhallen in Gothenburg—a large covered sports hall in steel, concrete and siporex—is also by Eriksson.

1965 Economist 5 June 1176/2 Siporex is an autoclaved lightweight aerated concrete product which was first developed in Sweden some thirty years ago, and is now used all over the world.