Thermfrax® Gemcolite® LD and HD are Unifrax Engineered Thermal Component’s (UETC) standard insulating fiber board. Both use man-made vitreous alumina-silicate fibers, with organic and inorganic binders, to generate a strong board with excellent insulating properties while maintaining a low density when compared to insulating brick or monolithic refractory blocks and shapes. These products resist thermal shock allowing for faster cycle times, and has excellent acoustic absorbing properties. UETC.’s vast forming and machining capabilities allow Thermfrax® Gemcolite® to be made in a variety of shapes, besides standard boards and blocks, and can be tailor made to customer required shapes and specifications. This material is also easily cut and formed using hand tools.