Ultra 42% Firebrick Need Help? Contact us Home High Temperature Dense Fire Bricks Ultra 42% Firebrick Ultra Refractory Firebricks Ultra Fire Bricks are available in a variety of low iron and alkali contents. The high Alumina range utilises various minerals to give 60% and 80% Alumina materials, for the highest Alumina contents tabular and fused Alumina is used. Download Brochure Supplier Contact us Find a Branch Downloads