40 x 48 Flat Poly Bags - Heavy Duty 4 Mil Protection
When you need serious protection for larger items, these heavy-duty 40x48 flat poly bags deliver. At 4 mil thickness, they're built tough for equipment covers, bulk storage, shipping protection, and industrial applications where thinner bags just won't cut it. Crystal-clear LDPE lets you see contents at a glance while keeping dust, moisture, and dirt out.
Specs: 40 x 48" | 4 mil | LDPE Poly | 50/case | FDA food-contact compliant
Key Features
- 4 Mil Heavy Duty: Extra-thick construction resists punctures and tears during handling, shipping, and long-term storage
- Large 40x48" Size: Fits equipment, bulk merchandise, seasonal items, and oversized products that smaller bags can't accommodate
- Crystal-Clear LDPE: Easy visual identification of contents without opening — perfect for organized storage and inventory
- FDA Food-Contact Compliant: 100% virgin LDPE meets FDA/USDA specifications for food-contact applications
- Flat Open-Top Design: Quick loading and unloading — seal with tape, ties, or heat sealer
Applications
- Equipment & Machinery: Protect tools, small equipment, and machinery from dust and moisture during storage or transit
- Bulk Apparel & Textiles: Store comforters, blankets, bulk clothing, and fabric inventory without compression damage
- Seasonal Storage: Keep holiday decorations, outdoor furniture cushions, and seasonal merchandise protected year-round
- Shipping Protection: Add a protective layer inside boxes for large items, artwork, and merchandise that needs extra care
Common Questions
Q: How thick is 4 mil — is it right for my application?
A: 4 mil is considered heavy-duty for flat poly bags. It's about the thickness of a standard trash bag and provides excellent puncture resistance. For lighter items or temporary coverage, 2-3 mil works fine. For sharp edges, heavy parts, or long-term storage where you need maximum protection, 4 mil is the right choice.
Q: Can I heat seal these bags closed?
A: Yes! LDPE poly bags seal easily with a standard impulse heat sealer. You can also close them with tape, twist ties, or zip ties depending on your needs.
Q: Are these bags food safe?
A: Yes — these bags are made from 100% virgin LDPE that meets FDA/USDA food-contact specifications. They're safe for storing food items, though at this size they're more commonly used for equipment, bulk goods, and industrial applications.
Why Choose Cellobags.com
For over 40 years, we've been helping small businesses, makers, and entrepreneurs find the right packaging solutions. Whether you're protecting inventory, shipping handmade goods, or organizing your workshop, we've got the bags — and the expertise — to help you succeed. Fast shipping means you won't be left waiting.