basalt fiber fabric can use as filter cloth or fireproof material. (1)weight=900gsm (2)width=1020mm Basalt fiber fabrics are woven from continuous basalt yarn (diameter under 9µ) which can be custom-made to your needs. This fabric can handle temperatures of -260°C to 650°C. Different coatings can improve their properties including better flexibiliy, wearability, wave transparencies, water ...