A few weeks ago, a facilities manager who handles pet friendly apartments in Fort Dupont DC called me about door seals that kept slipping out of their frames. His vendor said the replacement seals were “just as good.” They weren’t. That call turned into a 45-minute talk about why material names matter—and it reminded me why I keep two charts on my wall: one for elastomers, one for plastics.

I’m a quality and compliance manager at a polymer products manufacturer. I review roughly 200 unique items every year, and in 2024 I rejected about 6% of first deliveries because the material spec didn’t match the application. This article is a condensed version of the conversation I have with buyers who ask me the same two questions: DuPont Teflon vs. silicone for non-stick and heat, and neoprene vs nylon for things like a hydraulic hose rack.

The Framework I Actually Use: Conditions First, Names Later

In my opinion, the biggest mistake people make is asking, “Which is better?” before they know what the part has to do. I’d argue you should start with three questions:

  • What temperature will it see?
  • Does it have to flex or just stay rigid?
  • Will it touch chemicals, oil, water, or UV light?

That may sound basic, but it took me a while to learn. It took me 4 years and about 150 material mismatches to understand that vendor stories are less important than the operating environment. The “best” material only matters if it fits the conditions.

Dimension 1: Heat Resistance and Chemical Tolerance—Teflon vs. Silicone

When people say “DuPont Teflon”—or, in older maintenance manuals, “Teflon DuPont”—they’re usually talking about PTFE. Teflon is the brand name that started at DuPont; today the trademark is managed by Chemours, but the material is still the same chemically inert, low-friction plastic. Silicone is a different animal—a synthetic rubber built on a silicon-oxygen backbone.

According to DuPont’s PTFE technical literature, continuous service temperature is around 260°C (500°F). Food-grade silicone is usually rated to about 220°C (428°F). Both are fine for a kitchen, but in industrial settings that extra 40°C can be the difference between a gasket that lasts and one that cooks into a hard disk.

Teflon also wins on chemical resistance. There are very few substances that attack PTFE at temperatures it can handle. Silicone is good, but it can swell in certain solvents—fuel, for example—that won’t phase PTFE. If your part might touch grease, brake fluid, or aggressive clean-in-place chemicals, I’d lean PTFE.

Dimension 2: Flexibility and Release—Silicone Wins This One

Now the other side of the same comparison. A strawberry silicone mold is flexible by design. You have to bend, twist, and peel it back to get the chocolate out. PTFE, by comparison, is a rigid plastic. You can make a PTFE-coated pan, but you can’t wrap it around a strawberry-shaped cavity. If the application requires flexing, silicone is the answer. That’s geometry, not brand loyalty.

Here’s where I got surprised. Teflon has the lowest coefficient of friction of almost any solid material. But in everyday use, silicone can feel “non-stick enough” because the food releases once the surface flexes. A strawberry silicone mold doesn’t need oiling most of the time. A Teflon-coated baking sheet does a better job on flat, sticky surfaces like melted sugar.

When I compared a Teflon-coated baking sheet and a silicone mold side by side in the same oven, I finally understood why both exist. One is a rigid surface with a slippery coating; the other is a flexible part that demonstrates release. They solve the same general problem in completely different ways.

So glad I checked the Shore hardness spec before approving a batch last year. I almost accepted a lot of strawberry silicone molds that would have torn on the first demold—soft enough, but not the right durometer for the filling they were using. (Note to self: always ask about demolding frequency before signing off.)

Dimension 3: Neoprene vs Nylon—Cushioning vs. Load-Bearing

Now let’s apply the same framework to a second comparison. If you’re building or restocking a hydraulic hose rack, you might be tempted to pick one material and use it for everything. I’d recommend thinking in terms of roles: cushioning versus load-bearing.

Neoprene: The Cushion and Shield

Neoprene is a rubber-like elastomer (polychloroprene) with good oil, weather, and abrasion resistance. It compresses, bounces back, and absorbs shock. On a hydraulic hose rack, a neoprene pad keeps the hose from rubbing against a metal support every time you pull it out. It also gives a little bit of grip, so hoses don’t slide sideways when you’re grabbing one in a hurry.

Nylon: The Structure and Tension Member

Nylon is a plastic. It doesn’t bounce like neoprene, but it has high tensile strength, resists fatigue, and can be made into webbing, clamps, rollers, or bushings. If you need a strap to hold a hose in place, or a molded guide that won’t distort under repeated loads, nylon is the better choice. Nylon webbing can hold thousands of pounds; neoprene can only hold its own shape.

The surprise wasn’t that nylon failed under tension. It was that people used it where they needed compression. I saw a hydraulic hose rack with nylon straps wrapped tight around the hoses. The straps were fine, but the hoses developed flat spots because there was no neoprene buffer. The fix wasn’t a stronger strap; it was adding a neoprene liner. To be fair, nylon is stronger per dollar. But strength isn’t absorption.

Environment matters more than most buyers expect. Neoprene handles ozone and UV better than many general-purpose rubbers, which is why it shows up in outdoor equipment. Nylon can degrade in strong UV unless it’s compounded with stabilizers. If your hydraulic hose rack sits under a sun-exposed awning, that’s not a detail. That’s the specification.

Nylon also absorbs moisture from the air, which can change its dimensions. In a marine setting, that matters. Neoprene absorbs very little water, so it stays dimensionally stable in wet environments. If your rack is pressure-washed regularly, choose neoprene for contact points and nylon only for parts that don’t stay wet.

There are hybrid products—neoprene-coated nylon fabric, for instance—that combine the cushioning of neoprene with the tensile strength of nylon. Those work well for slings and covers. But for a hydraulic hose rack, I’d still keep the roles separate: neoprene where the hose meets a hard edge, nylon where you need tension.

How to Decide: A Short Checklist

Here’s the selection advice I give buyers, in plain words:

  • If it has to flex and release, go with silicone.
  • If it has to handle high heat and harsh chemicals without changing, choose PTFE (Teflon).
  • If it cushions and protects a surface, neoprene.
  • If it has to carry a load or stay rigid, nylon.

And if you’re responsible for, say, the door seals in pet friendly apartments in Fort Dupont DC, remember that same logic. The seal has to compress, but it also has to deal with heat, humidity, and maybe the occasional claw. That’s not a brand name decision. It’s a material spec decision. (I really should write a short checklist for the facilities team; they keep asking.)

In the end, I’m not going to tell you that DuPont Teflon is “better” than silicone or that neoprene always beats nylon. That’s like asking which is better: a screwdriver or a saw. It depends on what you’re cutting, tightening, or dismantling. If you start with conditions instead of preferences, most of these decisions sort themselves out.