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20" x 42" 4 Mil Poly Bags

100 % of 100
In stock
  • Buy 3 for $117.19 each and save 1%
  • Buy 5 for $115.51 each and save 3%
  • Buy 10 for $113.89 each and save 4%
  • Buy 25 for $112.31 each and save 6%

Want to have your logo, instructions or other information on these bags?

Random Printing: Custom order as few as 15 cases of bags made to these specs with your random printing (Image appears at least one time placed randomly on each bag).

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Shipped Weight:

45 lbs


200 Bags per Case


Polyethylene LDPE



20 Inches


42 Inches


4 Mil

Product Properties


200 Bags per Case

Operational Temperature:

20 - 150F

Melting Point:

221 - 239 F

Storage Instructions:

Store at temperatures less than 120 degrees F. Avoid storage in direct sunlight.

Shelf Life:

5-10 years, when properly stored.

Material Specifications

Material Specifications:

  • Low/Linear Low Density
  • Sulfur free
  • Amine and Silicone free
  • Latex free
  • BHT free (Butylated Hydroxy Toluene)
  • Chlorine free
  • PVC free

Recommended Usage

Recommended Usage:

  • Can be sealed with Twist Ties, a heat sealer, or bag sealing tape.
  • Recommended seal bar width for heat sealers: 5mm Seal
  • Minimum sealer length: 21 inches
  • If using for trash compactor 3 or 4 mil is recommended. See Trash Bags.
  • Meets FDA 21 CFR 177.1520
  • Acid free and archival safe
  • Free of GMO's, fungicides and fumigants.

Product Restrictions

Product Restrictions:

  • These bags do not have a ziplock. See ziplocks.
  • Not treated for printing by end-user.
  • Not recommended for dry ice.
  • Not microwaveable. See microwaveable bags.
  • Cannot be used for baking or boiling. See baking or boiling bags.
  • Do not store in sub-freezing temperatures.
  • Water-resistant not waterproof. See Leakproof Bags.
  • Cannot use with vacuum machine. See Vacuum Bags.
  • Not postal approved. See postal approved bags.
  • Not clean room approved.
  • Not UPS approved

Shipping Specifications

Case Length (in):


Case Width (in):


Case Height (in):


Case Cube (in):


Case Weight (lbs/Case):





Controlled Life Additive:



Not Compostable

PCR Content:

0% PCR

Compares To

Compare Uline:


Compare Interplas:



20" x 42" 4 Mil Poly Bags | Heavy-Duty Packaging Solutions

Our 4 Mil Clear Flat Poly Bags offer excellent strength and durability with a heavy-duty LDPE/LLDPE construction, making them ideal for industrial, food, and pharmaceutical use. These bags are engineered to withstand your tough demands, providing reliable protection for your valuable items.

Key Features:

  • Heavy-Duty LDPE/LLDPE Construction:

    Crafted from a blend of virgin Low and Linear Low Density Polyethylene, our 4 mil poly bags are thick and robust, ensuring superior strength and durability for your packaging needs.

  • Pharmaceutical and Food Safe:

    Meets USDA and FDA standards, our bags are BPA-Free, guaranteeing safety for food and pharmaceutical use, providing peace of mind for your packaging requirements.

  • Efficient Lay Flat Design:

    Designed for easy storage and handling, our flat packed cartons ensure efficient organization and accessibility of your poly bags.

  • Flexible Sealing Options:

    With an open top design, our bags are ready for your choice of sealing method, offering versatility and convenience in securing your items.

  • Transparent and Non-Toxic:

    Boasting excellent transparency and non-toxic properties, our poly bags allow for clear visibility of contents while ensuring safe storage for all items.

  • Custom Size and Printing Options:

    Tailor our poly bags to your specific requirements with custom size and printing options available, allowing you to personalize your packaging solutions.

Unique Discount Plastic Bags Benefits:

  • Five Star Guarantee:

    Our products are backed by our industry-leading Five Star Satisfaction Guarantee, ensuring your complete satisfaction.

  • Low Price Guarantee:

    We strive to offer the best value online. If you find a lower price from a qualified competitor, simply let us know, and we'll match it*.

  • DiscountPlus™ Points:

    With every purchase, you automatically earn valuable DiscountPlus™ Points, which can be saved and used for discounts on future orders or as gift cards for employee rewards or personal use, demonstrating our appreciation for your loyalty.

Experience the strength, reliability, and versatility of our 4 Mil Clear Flat Poly Bags. Trust Discount Plastic Bags for all your heavy-duty packaging needs and enjoy peace of mind knowing your items are protected with quality products. Contact us for further assistance or to discuss our selection.

*Terms and Conditions apply.

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