Flat Poly Bags 36″ x 42″ 4 mil 100/CTN

HVAC Sheet Metal & Ductwork Panel Poly Bags 36×42 — 4 mil LDPE | 100

Protect galvanized sheet metal blanks, ductwork sections, and large HVAC panel components from scratches, moisture, and handling damage with 4 mil LDPE flat poly bags sized 36×42 inches. The heavy 4 mil gauge stands up to sharp sheet metal edges and corner burrs without tearing, keeping finished duct sections and pre-cut sheet metal clean and corrosion-free from the fabrication shop to the installation site.

Specs

• Size: 36 x 42 in
• Gauge: 4 mil
• Material: Low Density Polyethylene (LDPE)
• Qty: 100/carton
• FDA compliant LDPE resin
• Seal options: heat seal, zip tie, tape, or staple

Frequently Asked Questions

What HVAC parts fit in a 36×42 poly bag?

The 36×42 opening accommodates most flat duct sections, sheet metal blanks, and large rectangular HVAC panels laid flat. Typical 24×24 inch, 30×30 inch, and similar standard flat duct fittings fit with room to spare. For duct sections with flanges or bends, the extra dimension allows the bag to seat fully over the part without tearing at the corners.

Does galvanized sheet metal require a special bag?

No special bag is needed, but the 4 mil gauge is important. Galvanized sheet metal often has sharp slit edges and punched corners that puncture lighter poly bags during stacking and bundling. The 4 mil wall provides reliable puncture resistance and forms a moisture barrier that prevents white rust and surface oxidation on freshly galvanized parts in storage.

Can these bags also be used for stainless steel or aluminum sheet metal?

Yes. The 36×42 size and 4 mil gauge work equally well for stainless steel sheet blanks, aluminum coil segments, and other large flat metal stock that needs individual protection during warehousing, handling, or shipment to secondary processing or job sites.