Pumice for Foundry Core Sand Additive
Fine pumice added to foundry core sands improving permeability and reducing defects. Classified under HTS 2513.10.0080 as pumice stone natural abrasive. Enhances collapsibility for easier shakeout.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If natural silica sands
Silica-based foundry sands classified under heading 2505.
If refractory cements/mortars
Pumice in refractory mortar mixtures becomes heading 3816.
If refractory bricks containing pumice
Pumice formed into refractory shapes classified Chapter 69.
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Import Tips & Compliance
• AFS Grain Fineness Number testing for foundry sand specifications
• Thermal analysis for core baking performance
• Avoid organic contaminants affecting binder curing
Related Products under HTS 2513.10.00.80
Crushed Pumice Stone for Abrasive Cleaning
Crushed pumice stone is a naturally occurring volcanic rock used as an abrasive for cleaning surfaces like pots, ovens, and industrial equipment. It falls under HTS 2513.10.0080 as 'other' pumice stone that is not solely for grinding or polishing millstones, heat-treated or not. The irregular granules provide effective scrubbing without scratching.
Pumice Powder for Metal Polishing
Fine pumice powder derived from natural pumice stone, used as a mild abrasive for polishing metals, jewelry, and lapidary work. Classified under HTS 2513.10.0080 as 'other' pumice, distinct from millstone-specific uses. Its porous structure allows gentle material removal without excessive scratching.
Tumbled Pumice Pebbles for Stone Washing
Smooth, tumbled pumice pebbles used in textile stone-washing processes to create distressed denim effects. Falls under HTS 2513.10.0080 as 'other' pumice stone, a natural abrasive not limited to millstones. The rounded shape prevents fabric damage while providing abrasion.
Heat-Treated Pumice Granules for Water Filtration
Heat-treated pumice granules optimized for porosity in water filtration systems and aquariums. Classified in HTS 2513.10.0080 as 'other' pumice stone, permissible even if heat-treated per heading terms. Enhances biological filtration through natural porous structure.
Natural Pumice Blocks for Hand Scrubbing
Solid natural pumice blocks used for personal care like removing calluses and dead skin on feet. HTS 2513.10.0080 covers this 'other' pumice stone as a natural abrasive. Lightweight and porous for effective yet gentle exfoliation.
Pumice Grit for Sandblasting Media
Coarse pumice grit sized for low-pressure sandblasting to clean masonry and delicate surfaces. Falls under HTS 2513.10.0080 as 'other' natural pumice abrasive. Provides gentler blasting than quartz or garnet.