Poly Bags
Bottom Seal
Flat poly bags with a single strong seam across the base — built to your exact specs.
What are bottom seal bags?
Bottom seal bags — also called flat poly bags or bottom weld bags — are made by sealing a continuous tube of polyethylene across the bottom of the bag. That 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.
Because the weight of the contents rests on the bottom seal rather than weaker side seams, it is one of the most structurally sound ways to make a plastic bag — especially for products that are heavy, sharp-edged, or stacked.
Where it fits
Common applications
Hardware and construction materials
Parts and tools
Food ingredients and dry goods
Apparel and textiles
Retail multipacks or promotional kits
Features
Built to perform
- Substantial support for stacked or weighted products
- Clean finish with no side seals
- Compatible with manual or automatic filling systems
- Consistent sizing and a lay-flat profile
- Custom-built to suit your use case
Custom options
Customize every spec
Custom sizes
Length, width, and thickness built to your needs.
Film options
Virgin, recycled, or specialty blends.
Material
LDPE or LLDPE, chosen for the flexibility and strength required.
Additives
UV protection, anti-static, or slip agents.
Printing
Logos, labels, or product info, available on request.
Related products
Other poly bags in our catalog
Why Rutan
Why choose Rutan for your poly bag needs?
All of our bottom seal bags and other poly products are manufactured in our New Jersey facility with complete in-house quality control. You’re working directly with the team who designs, manufactures and ships your product — no outsourcing or reseller involved.
This gives you faster turnaround, tighter tolerances and responsive service throughout the order process.
Have a packaging challenge?
Tell us about your application and we’ll engineer a custom solution.
