4 X 21 Inch Silicon Carbide Sanding Belts, 3 Pack

$16.15 ~~$21.83~~ In stock

4x21” Industrial Grade Silicon Carbide Sanding Belts

Our 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: 3

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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Delivery costs

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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 (4.6 / 5 · 5 reviews)

Eva ★★★★★ Oct 22, 2026

Cutting through some old paint on a metal cabinet was way easier than I expected—these belts stay sharp even after several passes. The consistent 4x21 size fits my sander perfectly without any slipping or bunching.

William ★★★★★ Oct 20, 2026

Finally, a belt that doesn't glaze over after one pass on oak; the silicon carbide grit stays sharp through all three belts. They run true on my sander with no tracking fuss, and the 4x21 size fits perfectly.

Robert ★★★★★ Oct 18, 2026

I was a little skeptical about these belts given the price, but the silicon carbide grit cuts through metal and wood so cleanly with light pressure. The 4x21 size fits my sander perfectly, and after a dozen uses, they’re still holding up without shedding.