Waste Disposal Method The as-manufactured refractory or dust from this material is not considered a hazardous. However, used product (and dusts generated during maintenance and tear-out operations) May be contaminated with other hazardous substances from the particular application (for example, metals). Therefore, appropriate waste analysis may be necessary to determine proper disposal. A qualified environmental professional in accordance with applicable federal, state, and local regulations should determine waste characterization and Disposal/treatment methods.