This checklist is for you if: you're ordering plastic netting, polyethylene glycol plastic components, or any HDPE (high-density polyethylene) products from a tool and die shop or custom fabricator; you're sourcing parts for a product that uses plastic netting; or you simply want to avoid having a $3,200 order end up in the trash because the spec was wrong. I've done that. More than once. This list, built from the last two years of my own embarrassing dispatches, stops you from doing the same.
Here are the 7 steps I now use on every order. Skim them, then use them.
Step 1: Verify Your 'Plastic' is the Right Plastic (Polyethylene vs. Polypropylene)
This is the one that got me in 2022. I needed a batch of custom polyethylene netting for an industrial filter application. I assumed all 'plastic netting' is the same. It isn't. Polyethylene (PE) and polypropylene (PP) look almost identical, but their chemical resistance and melting points are totally different. My order—1,500 units—was made in PP. They dissolved in the solvent within a week. I didn't have hard data on the exact failure rate of that specific solvent, but based on our lab's subsequent test, my sense is it was a 100% failure. The reprint cost, for a rush order from a different shop? $2,100.
Check it on your order: “Is this specifically polyethylene glycol plastic (PEG) or standard HDPE?” Write it on the PO. Do not assume 'standard.'
Step 2: Confirm the 'Netting' Structure (Mesh Size & Pattern)
Plastic netting is not a monolith. It comes in diamond, square, and hexagonal meshes, plus extruded versus woven variants. After the PP disaster, I finally made a correct order—except I specified '1/4 inch mesh' without clarifying if I meant the opening or the center-to-center distance. The vendor shipped a product with holes half the size I needed. This was on a Westlake tool and die spec sheet I'd adapted. The error affected all 2,000 units. $600 in wasted material, plus a day of cutting it up for scrap.
Check it on your order: “What is the exact opening dimension (not center-to-center), and what is the strand thickness? Is this extruded or woven?”
Step 3: Specify the Additives (UV Stabilization, Flame Retardant, etc.)
This step doesn't apply to every order, but if your plastic netting goes outdoors or needs to pass a fire code, it's everything. In early 2023, I ordered 500 yards of green netting for a landscaping project. I didn't specify UV stabilization. By September, it was brittle and cracking.
When I compared those UV-treated and non-UV-treated samples side-by-side, the untreated one was like brown sugar. The treated one still looked new. Best glue for HDPE plastic? It's UV-sensitive too—a fact I learned the hard way when a batch of glued assemblies failed in the sun.
Check it on your order: “Does this require UV stabilization? Flame retardant? Antistatic?” If you don't know, ask the vendor before quoting.
Step 4: Match the Glue (If You're Bonding)
HDPE is notoriously low-surface-energy. The best glue for HDPE plastic isn't a super-glue off the shelf. I tried one of those in 2024 for a quick prototype. It peeled off like a sticker. The best glue for HDPE plastic is a two-part epoxy or a specific LSE (Low Surface Energy) adhesive. I once ordered 250 assemblies, used the wrong adhesive on 50 of them as a 'test' (the rest sat in a box), and only found out when the client returned them—full failure. The rework cost a day of labor and the embarrassment of explaining why I 'knew better.'
Check it on your order: “Is the intended adhesive compatible with HDPE? Have you done a peel test? Do we need a surface treatment (like flame or corona) before bonding?”
Step 5: Confirm the Tolerance (It Matters More Than You Think)
This is the step most people—including me—skip. 'Plastic netting' sounds forgiving. But when that netting needs to fit inside a machined frame (a Westlake-style precision component), even 1/32 off can cause a jam. In a recent order for a filtration system, I assumed a +/- .010 tolerance. The parts came in at .015 consistently. That extra .005 meant they didn't seat. The customer rejected the entire batch.
Check it on your order: “What is the critical dimension? What is the acceptable tolerance? Is this a 'functional fit' or 'precision fit'?”
Step 6: Ask About the Die (If Using a Tool & Die Shop)
When ordering custom extruded or punched plastic netting, the tooling cost is often the hidden expense. I know a Westlake tool and die shop that specializes in this. They do great work. But I once ordered a custom mesh pattern that required a new die—$1,500 in tooling alone—without clarifying that the die would be my property. When the first run failed (my spec error, not theirs), I was stuck. I'd paid for a die I couldn't use.
Check it on your order: “Is this a proprietary die or a standard one? Who owns the tooling? What's the cost if I need a minor tweak?”
Step 7: Lock in the Shipping & Handling (Especially If You're Near Westlake Village)
If you're ordering for a project in Westlake Village, CA (which is common for our team—we do a lot of polymer work there), shipping matters. A local vendor might be a day away. But if you're ordering from overseas (common for netting), the lead time can be 8-12 weeks. I've had an order miss a deadline because I assumed 'air freight' meant 3 days. It didn't—customs clearance delayed it by a week.
Check it on your order: “What is the exact lead time? Are there any documented delays? What happens if the shipment arrives damaged?” And yes, if you're a pet friendly hotel in Westlake Village, CA needing outdoor netting for kennels, tell the vendor exactly where those pups will be. UV stabilization and safety are non-negotiable.
Step 8 (Bonus): Read the Fine Print on Returns
I wish I had tracked the return policies of all my vendors more carefully. But I can say anecdotally: custom-extruded plastic netting is rarely returnable. 'Custom' means 'as made for you.' If you messed up the spec in Step 1, it's your loss. In Q1 2024, I tried to return a batch of polyethylene glycol plastic beads that had the wrong melt flow index. The vendor said no. That was a $3,000 lesson.
Check it on your order: “What is the return policy for custom-made goods? If my spec is clear and your production error occurs, who covers the reprint?”
A Final Note on Context
To be fair, many online printers like 48 Hour Print work well for standard products (business cards, brochures). But for custom plastic netting, HDPE, and tool-and-die work, you're usually dealing with specialized shops. Don't apply the same 'order online and hope for the best' mentality you'd use for a flyer. This is a technical procurement process.
Granted, this checklist requires more upfront work—maybe 30 minutes. But skipping it has cost me over $6,000 in the last 18 months. The fundamentals haven't changed: precise communication saves money. The execution, though, should be on a checklist—not in your head.