Silica Ramming Mass Refractory Mix from Canada
A powdered refractory composition of high-purity silica and borax binder used for ramming into linings of induction furnaces. Classified under HTS 3816.00.20.50 as 'other' refractory mortars excluding dolomite mixes and heading 3801 products. It provides excellent thermal shock resistance for molten metal containment up to 1700°C.
Duty Rate — Canada → United States
13%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Provide furnace application specs and silica purity (>98%) certificates to distinguish from general silica powders
• Ensure borax content is declared in SDS; bulk packaging requires proper ventilation labeling for dust hazards