If you're looking into Dupont products for your next project, you probably have a bunch of specific questions. Things like "What's the difference between PP and PET?" or "Can I actually use that Teflon snow repellant on my equipment?"

I've been sourcing specialty materials for industrial applications for about 7 years now. And in that time, I've made some pretty expensive mistakes—like ordering the wrong grade of silicone resin for a mold, or mis-specifying a plastic sheeting that warped under heat. This FAQ is a collection of the questions I wish I'd asked before those orders.

Let's get into it.

1. What are the main categories of Dupont products?

Dupont's portfolio is huge, but for B2B buyers, the products you'll bump into most fall into these buckets:

  • Teflon/PTFE Coatings: Non-stick, high-temp resistant coatings for industrial parts, cookware, and specialty tools.
  • Thermoplastics (like Delrin acrylic, Zytel nylon, etc.):Used for machined parts, gears, and structural components.
  • Elastomers (Viton, Neoprene): High-performance rubbers for seals and gaskets in harsh environments.
  • Silicone Lubricants & Resins: Molds, release agents, and high-temp greases.
  • Hydraulic Hoses & Rubber Products: Fluid transfer and heavy-duty industrial use.

My mistake: In 2022, I ordered a "silicone resin mold" assuming it was the standard cure type. Turned out it was a high-temp variant that didn't cure properly at room temp. Lost $320 in material and a week of production time.

2. Can I use Dupont Teflon Snow and Ice Repellant on anything other than snow gear?

This is a question I get a lot. The short answer: Not really, unless you know what you're doing.

The Teflon Snow and Ice Repellant is formulated specifically for outdoor gear (jackets, boots, tents). It's a spray-on fluoropolymer that bonds to fabric. If you spray it on metal parts or plastic components, it won't bond correctly. I've seen folks try to use it on conveyor belts or plastic chutes to reduce friction—it just rubs off in a day or two.

For industrial applications, you want an industrial-grade Teflon coating (like a PTFE spray from a specialist applicator). The consumer-grade stuff is wasted on non-porous, non-fabric surfaces.

Personal experience: I once had a client ask if we could use it on a small plastic gear box. I said no. They ordered it anyway. It didn't work. They wasted $78 on a can of spray and an hour of labor.

3. How do I choose between PP and PET plastic for packaging or parts?

This is a classic application-specific question. Here's the quick breakdown:

  • PP (Polypropylene): Better chemical resistance, higher fatigue resistance, but lower temperature tolerance (melts around 160°C). It's also cheaper per pound and more flexible.
  • PET (Polyethylene Terephthalate): Higher stiffness and strength, better heat resistance (up to 260°C for some grades), but less chemical resistance and more brittle.

Rule of thumb: If it's a structural part or needs to handle heat, go PET. If it's a hinge or chemical exposure, go PP.

My blunder: In Q3 2024, I ordered a batch of PET sheets for a chemical tank lining. Should have been PP. The PET swelled and cracked within 3 weeks. That was a $1,200 mistake.

4. What is silicone resin mold material, and how do I choose the right one?

Silicone resin for molds is a two-part system (base + curing agent) that cures into a flexible, heat-resistant rubber. It's used for making casting molds for resins, concrete, wax, and low-temp metals.

Key specs to look for:

  • Cure time: Fast cure (<1 hour) for simple shapes; slow cure (8+ hours) for complex undercuts.
  • Hardness (Shore A): Lower number (like 20) for flexible molds; higher number (like 60) for rigid molds.
  • Temperature resistance: Standard is ~200°C; high-temp versions go to 300°C.

Real mistake: I once bought a "universal" silicone resin without checking the Shore hardness. It was 50A—way too hard for a wax mold. The wax wouldn't release properly. That cost me $450 in ruined castings.

As of January 2025, a standard 1kg silicone resin kit from a reputable supplier runs about $65–$110. Verify current pricing directly.

5. What are Teflon discs, and are they worth the premium?

Teflon discs are essentially PTFE sheet stock cut into circles. They're used as non-stick surfaces in heat sealing, as liners in valves, or as spacers in high-temp environments.

Are they worth it? Depends.

  • If you need non-stick + high temp (260°C continuous): Yes. Nothing else works as well.
  • If you need cheap + disposable: No. Aluminum or silicone discs are 1/3 the cost.

Pricing note: A 6-inch diameter Teflon disc (1/8 thick) costs about $28–$45 based on quotes from November 2024. That's 2–3x more than a silicone or aluminum disc. But for critical applications, it stops a production line failure.

I've seen a factory try to substitute silicone discs for Teflon in a heat seal station. The silicone melted after 5 hours. That shutdown cost them ~$2,000 in downtime. The Teflon discs would have cost $90 more.

6. Are Dupont products suitable for small orders / startups?

Short answer: Yes, but you need to buy smart.

Dupont themselves sell primarily in bulk—truckloads, not sample packs. But the good news is there are hundreds of authorized distributors and fabricators who will sell you one roll, one sheet, or one disc. You just have to find the right channel.

Startup tip: Start with a known distributor like McMaster-Carr or Grainger. They sell Dupont-sourced materials in small quantities. You'll pay a premium on a per-unit basis, but you can confirm the material spec before committing to a bulk order.

Personal stance: When I first started sourcing parts, I was buying $150 orders. Some suppliers treated me like a nuisance. The ones who took my order seriously? I've been buying from them for 6 years. Today's $300 test order can be tomorrow's $15,000 production run.

7. What's the biggest mistake people make when ordering Dupont materials?

From my error log (and I've got a list of 47+ documented screw-ups across our team):

  • Not verifying the exact grade. A simple "Teflon" can mean PTFE, PFA, or FEP. They behave very differently at high temps.
  • Skipping the data sheet. I ordered a silicone resin thinking it was one thing. The tech data sheet was 8 pages. I skimmed it. Mistake.
  • Assuming minimums don't apply to you. Some distributors will sell you a single Teflon disc. Others require a $500 minimum. Ask before you get an invoice.

If you ask me, the top prevention tip is this: call the distributor and ask one random question about the material's temp limit or chemical resistance. If they hesitate or guess, find another supplier. That hesitation cost me $890 once.