The quality control of vermiculite brick runs through the whole production process, from raw material selection to finished product delivery. Our company selects high-quality vermiculite ore, controls the expansion process strictly, optimizes the proportion formula, and conducts high-temperature sintering and performance testing. Each batch of vermiculite brick products has passed compressive strength, thermal conductivity, fire resistance and other tests to ensure stable and qualified quality. We have a complete quality management system, in line with international quality certification standards, to provide customers with assured products. For quality inspection reports and product certification of vermiculite brick, please contact us for access.