Heavy Duty Canvas Tarp - Flame Resistant
• 12 oz. cotton duck with 6 oz. FR wax treatment
• Meets CPAI-84 & NFPA 701 standards
• Water and mildew resistant treatment
• Rustproof brass grommets with 1/2" I.D.
• Double thick, double-stitched hems/seams
Made In The USA
By choosing this product, you're supporting American craftsmanship, local jobs, and ethical manufacturing. Built with care — designed to last.
Reduce Flammability, Maintain Airflow
Stop sparks before they spread. Our treated cotton canvas self-extinguishes in under 2 seconds, which meets the NFPA 701 after-flame limits and confirms the material will resist sustained combustion. Common uses include:
• Welding & grinding screens: Blocks sparks while letting fumes escape.
• Hot-work covers on construction sites: Shields nearby materials during cutting or torching.
• Emergency heat shield: Create quick barriers around boilers, generators, or heaters.
• Farm and heavy-equipment covers: Protects machinery that is still warm after shutdown.
These tarps are typically chosen over vinyl and poly options in situations where breathability is important, as the canvas material allows airflow and helps prevent condensation, while still providing robust fire protection
The Superior Flame-Resistant Cotton Canvas Tarp
Humphrys began in 1874 sewing heavy cotton canvas covers for Conestoga wagons—the freight haulers of the day. These covers were tough then, and they are still tough now. Each tarp starts with premium cotton duck that is treated for lasting water resistance. The reliable construction that served 19th‑century wagon drivers still defines every cotton canvas tarp we make today.
Check out this advertisement we ran back in the early 70s —it’s a reminder that quality never goes out of style.
American Greatness in Every Stitch
| Hem Options for Made-to-Order Tarps | |
 | Flat Hem with Grommets: This standard hem has double-layer edges, #4 rolled-rim brass grommets, and spur washers. Each grommet measures 1/2" inside diameter, is pvd-coated black, and is naturally resistant to corrosion. |
 | Grommets with Reinforced Patches: Recommended for higher tension settings, this version adds three extra layers of canvas around each grommet for added strength. It uses the same #4 rolled-rim brass grommets and spur washers as the flat hem, save with thicker material to manage load on each grommet. |
 | D-rings with Reinforced Patches: Designed for tasks like securing truck bed loads, this style includes reinforced canvas patches and steel-plated zinc D-rings. Each 1-1/8-inch D-ring is sewn onto seat belt webbing for stronger hold. Four-layer reinforced patches add further durability. Made in America, they perform well in tough conditions. |
100% Cotton Canvas
Made entirely from natural cotton fibers, with no synthetic material blended in.
Brass Grommets
Corrosion resistant 1/2" I.D., spaced every 2" on all four edges.
Wax Treatment
Can leave a slight rub-off or odor (best suited for outdoor use).
18 oz. Post-Treatment
After it’s treated, it becomes heavier—18 ounces per square yard.
Breathable - No Condensation
Keeps items dry without sweating, reducing the risk of mold, mildew, and rust.
Full Finished Size ±3%
Accounts for minor size variation due to fabric shrinkage, sewing, and treatment—about 3% larger or smaller than the listed size.
Custom Sizes Available
Need a different size? Request a quote.
Made in the USA
Manufactured in our Indiana facility.
