3 X 21 Inch Silicon Carbide Sanding Belts, 8 Pack

$23.87 ~~$35.63~~ In stock

Our 3x21 industrial grade silicon carbide belts are the perfect choice for fine finishing with lighter pressure. Silicon carbide is extremely sharp and friable, making it ideal for heat sensitive applications but not as long lasting as other abrasive materials. Its unique characteristics make silicon carbide a great choice for paint removal, sanding between coats, knife scale finishing, lapidary, or any application requiring consistent scratch patterns. Wet or dry applications. Hand built in the USA.

Available Grits: 24, 36, 60, 80, 100, 120, 150, 180, 220, 320, 400, 600, 800, 1000

Single Grit Pack Quantity: 8

Weight: Y-wgt (24g – 80g) or X-wgt (100g – 1000g)

Backing Material: Polyester

Waterproof: Yes, also oil resistant for wet sanding applications

Applications: Sanding, polishing, and finishing of glass, plastic, composite, epoxy, resin, stabilized wood, paint, rubber, stone, granite, cement, stainless steel, and non-ferrous metals (aluminum, titanium, bronze, brass, magnesium, etc.)

Closed Coat: 100% abrasive grain coverage

Joint: Bi-directional tape joint allows belt to run in EITHER direction (disregard arrows)

Grinding Aid: Anti-loading and heat reducing stearate coating for cooler grinding

Bonding: Resin over resin

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.8 / 5 · 5 reviews)

David ★★★★★ Oct 21, 2026

Finally got around to using these belts on some heat-sensitive aluminum, and the friable silicon carbide kept the metal from discoloring while still giving a smooth finish. The 8-pack is great value for how cleanly they cut compared to standard aluminum oxide belts I've used before.

Jason ★★★★★ Oct 20, 2026

I was a bit skeptical about silicon carbide for my finishing work, but these belts run noticeably cooler on the workpiece. The friable grit really does make a difference for heat-sensitive materials without bogging down.

Elizabeth ★★★★★ Oct 19, 2026

Used these on some heat-sensitive aluminum and was surprised how cool they stayed even with steady pressure. The silicon carbide grit stays sharp for a long time, so a single belt handled way more work than I expected before needing a swap.