Apachi® propylene cuts at a speed that matches acetylene. What's more , cuts that are made with Apachi® propylene have a uniform kerf , smooth surface and the slag falls away more easily. It is stored as a liquid and does not require a stabilising mass, unlike acetylene. Apachi® propylene ignites easily in a torch but has a smaller flammable range than acetylene. Supplied in a 85 litre steel cylinder containing 35 kg.