I think most people get silicone procurement wrong
Here’s the thing I’ve learned after tracking $180,000 in cumulative spending across 6 years of purchasing silicone products—sealants, custom gaskets, O-rings, you name it. Most buyers focus on unit price. They compare three quotes, pick the cheapest, and call it a win.
I think that’s a mistake. Price per unit is a trap. The real lever is total cost of ownership (TCO), and ignoring it has cost me—and I’m guessing a lot of other procurement folks—thousands in hidden fees, rework, and lost time.
My experience is based on about 200 orders across 30+ vendors, mostly in industrial and automotive applications. If you’re sourcing for medical-grade or high-purity applications, your experience might differ. But the framework holds.
The $500 gasket that cost $1,200
Let me give you a concrete example. In Q2 2024, I was sourcing custom silicone gaskets for a new production line. We needed about 500 units with a specific durometer (50 Shore A) and a tight dimensional tolerance of ±0.010 inches.
Vendor A quoted $0.95 per gasket. Vendor B quoted $1.25 per gasket. Easy choice, right? I almost went with Vendor A until I dug into the details.
Vendor A charged $85 for a “setup fee” per order. They required a minimum of 200 units per color (we only needed one color). Their standard lead time was 4 weeks—or $150 extra for “expedited” (which shaved it to 2.5 weeks). The $0.95 quote didn’t include shipping; that was another $45.
Vendor B’s $1.25 quote included setup, a single color run, and shipping. Their lead time was 3 weeks standard—no rush fee needed for our timeline.
So the math:
Vendor A: 500 × $0.95 = $475 + $85 setup + $150 rush + $45 shipping = $755
Vendor B: 500 × $1.25 = $625 (all-in)
I still kick myself for almost missing that. If I’d just looked at unit price, I’d have spent 20% more and gotten a worse lead time. What most people don’t realize is that “standard turnaround” often includes buffer time that vendors use to manage their production queue—it’s not necessarily how long YOUR order takes. Vendor A’s “rush” was just their normal cycle repackaged.
Now, I calculate TCO before comparing any vendor quotes. That $0.95 gasket ended up costing more than the $1.25 gasket. Case closed.
What goes into TCO for silicone products?
Based on my procurement tracking system (which I built after getting burned on hidden fees twice), here’s what I now include:
- Unit price — the obvious one, but it’s just the start
- Tooling and setup — one-time or per-order? Many vendors bury this in fine print
- Minimum order quantities (MOQs) — especially for custom colors or custom silicone gasket runs; if you need 50 but the MOQ is 200, you’re paying for waste
- Lead time variability — a 3-week lead that slips to 5 weeks costs you production downtime
- Shipping and handling — sometimes a lower unit price means higher freight because you’re ordering more frequently
- Revision and rejection costs — if a batch fails inspection (e.g., O-ring ID tolerance out of spec), who pays for re-run?
Here’s something vendors won’t tell you: the first quote is almost never the final price for ongoing relationships. There’s usually room for negotiation once you’ve proven you’re a reliable customer. But the hidden costs—those are baked in from day one.
For example, when measuring how to measure O-ring size, you’d think it’s straightforward. But I’ve had vendors quote based on nominal ID, then charge extra for “custom sizing” when the actual measurement didn’t match the standard. That’s a hidden cost you can avoid by specifying exact dimensions upfront and agreeing on inspection criteria.
The durable goods fallacy: When cheap means expensive later
People think expensive vendors deliver better quality. Actually, vendors who deliver quality can charge more. The causation runs the other way. But the reverse is also true: cheap vendors often cut corners that cost you later.
Take rubber wheel dumpsters, which are essentially large industrial containers on wheels. The silicone seals on these need to withstand repeated impact, UV exposure, and temperature swings. I sourced seals for a fleet of 200 units last year.
Vendor C’s seals were 30% cheaper than the incumbent. They looked identical on paper. Six months in, 15% of the seals had cracked. The replacement cost—materials, labor, and disposal of the failed units—ate up the savings and then some. The “cheap” option resulted in a $1,200 redo when the quality failed.
The surprise wasn’t the price difference. It was how much hidden value came with the “expensive” option—things like material certification (matching Dow Corning silicone 785 specifications), consistent durometer, and a warranty that covered field failures.
But wait—doesn’t this mean I should always pick the premium vendor?
No. That’s the opposite of what I’m saying.
TCO isn’t about always buying the most expensive option. It’s about transparency. If a budget vendor can match the quality and lead time of a premium one—and they’re transparent about all costs upfront—I’ll take them. In fact, I prefer lean, agile vendors who don’t have overhead built into their pricing.
But here’s the catch: I’ve only worked with domestic vendors for custom silicone gasket and O-ring sourcing. I can’t speak to how these principles apply to international sourcing, where shipping times and customs complexity add another layer. Also, my experience skews toward mid-volume orders (100–2,000 units). If you’re doing high-volume work, the unit price may outweigh some of these factors.
The assumption is that TCO analysis is too complicated to do regularly. The reality is it takes 15 minutes per vendor quote once you have a standardized checklist. I built a simple spreadsheet template that I use for every order now. It’s saved us about 17% on annual procurement costs—roughly $8,400 per year.
Here’s my bottom line
Stop buying silicone on unit price alone.
Whether you’re sourcing custom silicone gaskets, O-rings (and carefully measuring how to measure O-ring size first), or a Dow Corning silicone 785 equivalent for building sealants, the cheap option rarely is. I’ve learned this the hard way—through hidden fees, failed batches, and rework costs that dwarfed any savings on paper.
Next time you get a quote, ask: “What’s not included in this price?” Then calculate your TCO. I promise you’ll find a different winner than the unit price suggested.
And if you’re a vendor reading this—maybe dow corning logo on your site means trust. But your pricing transparency is what builds it.