At Rutan Poly, we manufacture custom bottom seal poly bags right here in New Jersey. Every bag is built to spec at our U.S.-based facility — no outsourcing, no middlemen. As a trusted name in flexible packaging for over 50 years, we help commercial and industrial clients get reliable, made-to-order solutions.
Explore all our options for custom poly bags, or keep reading to learn why bottom seal bags are one of our most requested formats.
What Are Bottom Seal Bags?
Bottom seal bags, also called flat poly bags or bottom weld bags, are made by sealing a continuous sheet of polyethylene film across the bottom of the bag. This process creates a single strong seam at the base, with no seals along the sides. The bag is then cut to size and left open at the top for easy loading and sealing.
This construction makes bottom seal bags especially durable because the weight of the contents rests entirely on the bottom seal, not on weaker side seams. It’s one of the most structurally sound ways to make a plastic bag — particularly for products that are heavy, sharp-edged, or stacked.
They are typically made from LDPE (low-density polyethylene) or LLDPE, depending on the flexibility and strength required. For clients who need added performance, bottom seal bags can include additives like UV protection for outdoor use or anti-static properties for electronics packaging.
Common uses include:
- Hardware and construction materials
- Parts and tools
- Food ingredients and dry goods
- Apparel and textiles
- Retail multipacks or promotional kits
These bags can be loaded manually or run through automated bagging equipment. Because of their consistent sizing and lay-flat profile, they’re a favorite in warehouse, manufacturing, and fulfillment environments.
Benefits of bottom seal bags:
- More substantial support for stacked or weighted products
- Clean finish with no side seals
- Compatible with manual or automatic filling systems
- Custom-built to suit your use case
Built to Your Specs—Not Pulled from a Shelf
We don’t sell off-the-shelf packaging. Every order is made to your exact needs:
- Custom sizes (length, width, and thickness)
- Film options: virgin, recycled, or specialty blends
- Additives available (UV protection, anti-static, slip agents)
- Printing for logos, labels, or product info (available on request)
Whether you’re packaging food, medical parts, or industrial components, we’ll help you get the right bag for the job.
Why Work With Rutan?
- Manufacturer-first — we control every step of production
- Made in the USA — all bags are produced and shipped from New Jersey
- Over 50 years of experience in industrial and commercial packaging
- Personal service and fast turnaround
- Trusted across industries, from food service to hardware and logistics
We’re proud to be more than just a packaging vendor. We’re your manufacturing partner, helping you meet production goals with quality you can count on.
Request a Quote
Ready to get started? Contact us today with your requirements, and our team will get to work on a custom solution.
