General-Purpose Surface Preparation
Medium Crushed Glass Blasting Media, 20/40 Mesh
Zafa 20/40 is our all-purpose grade: fast enough for production paint and rust removal, fine enough to leave a uniform, medium profile on steel. Recycled from solar panel cover glass and non-leaded CRT panel glass in Georgia, it has no free crystalline silica and no trash to clog your pot or metering valve. It's the grade to start with when you move off medium coal slag.
Product Specifications and Quality Checks
Key Features: 20/40 Mesh
Mesh Grade
20/40 mesh medium-grade crushed glass abrasive.
Material Source
Made from recovered solar panel cover glass and non-leaded CRT panel glass.
Clean Feedstock
Uses solar panel cover glass and non-leaded CRT panel glass, not bottle cullet.
Lot-Tested Quality
RCRA metals screening and crystalline-silica XRD.
Technical Specifications
Medium: 20/40 Mesh
| Specification | Medium 20/40 |
|---|---|
| Particle size range | Average particle size 0.40 mm (ASTM C136) |
| Typical surface profile | 3.1 mil average on steel (ASTM D4417 Method C) |
| Glass source | Solar panel cover glass and non-leaded CRT panel glass, Lawrenceville, GA |
| Crystalline silica (NIOSH 7500) | <0.1% by NIOSH 7500 (SSPC-AB 1 Class A) |
| Metals | TCLP lead 0.11 mg/L; EPA limit 5.0 |
| Foreign matter / loss on ignition | Organics (LOI) 0.002%; no oil detected; moisture 0.005% |
| Specific gravity | 2.8 |
| Hardness | Mohs 6 minimum |
| Blasting method | Dry or wet |
| Packaging | 50 lb bags, FIBC bulk bags, 42,000 lb truckload |
Medium-Grade Abrasive Applications
Applications: 20/40 Mesh
Confirm substrate compatibility and target profile with a representative trial.
Maintenance painting of steel.
General rust and coating removal before standard industrial coating systems.
Boat and barge hulls
Removes bottom paint and antifouling, including on fiberglass hulls, with less risk of gouging.
Trailers, trucks and farm equipment
Refurbishes frames and bodies before repainting.
Wood, brick and log homes
Strips paint and stain from softer surfaces.
Pricing & Packaging
20/40 Pricing
| Packaging | Quantity | Price per lb | Price per ton |
|---|---|---|---|
| FIBC bulk bags | 1–3 | $0.145 | $290 |
| FIBC bulk bags | 4 or more | $0.125 | $250 |
| Bulk truckload | 42,000 lb | $0.105 | $210 |
| 50 lb bags | 1–3 pallets | $0.160 | $320 |
| 50 lb bags | 4 or more pallets | $0.140 | $280 |
| 50 lb bags | Truckload, 14+ pallets | $0.120 | $240 |
Prices are for pickup at Lawrenceville, GA. Ton = 2,000 lb. Pickup only; orders are usually ready 2–3 business days after payment.
Need 20/40 mesh for your next project?
Request a quote or sample and share your quantity and surface-preparation requirements.
Review safety and technical data sheets, see pricing, or compare crushed glass with coal slag.
Switching from coal slag
Switching from medium coal slag?
20/40 glass is the usual replacement for medium coal slag on steel and hulls. It's lighter, so a pound covers more surface, and the light-colored finish makes it easier to see missed spots.
See the full comparison and cost calculator.
Same for every grade
From solar panels to blasting media, all in Georgia
- End-of-life solar panels and CRT displays arrive at CompuPoint USA’s R2v3- and RIOS-certified facility in Lawrenceville, Georgia.
- Solar cover glass and non-leaded CRT panel glass are separated. Leaded CRT funnel glass is kept out and goes only to licensed smelters.
- Zafa Glass crushes, screens and lot-tests the glass for RCRA metals, then bags it as blasting media.
Try Zafa on your next job
Tell us your grade and quantity. We’ll confirm pricing within 2 business days, and your order is usually ready for pickup in Lawrenceville in 2–3 business days. Free sample bags are available for pickup too.