I'll say something that gets me in trouble at supply meetings: small orders don't deserve smaller answers. If someone asks "does epoxy resin air dry?" they're not being lazy. They're being honest about where they are. I'd rather answer that question than get blamed later for mixed-up hardener ratios.
I'm the office administrator for a 40-person manufacturing facility. I handle roughly $180,000 in annual purchasing across nine vendors—Olin caustic soda, epoxy resin, packaging, maintenance chemicals, cleaning supplies. Maybe $220,000 if you include the year we redid the warehouse floor, though that was a one-time capital project. I report to operations and finance, so I've learned to check every invoice myself.
Over the past five years—or maybe closer to six, I'd have to check our records—I've developed a strong opinion: basic questions are legitimate, small buyers should be treated seriously, and epoxy resin doesn't dry in the air. That last one deserves a paragraph of its own because it trips up everyone from weekend crafters to commercial contractors.
Why Olin caustic soda is on our purchase order
We buy Olin caustic soda solution, 50%, in 55-gallon drums. It's sodium hydroxide, and we use it to adjust pH in our process water and clean equipment. When I took over purchasing in 2020, our old supplier kept missing delivery windows. I switched us to Olin because their quoting process was clear and their SDS paperwork was easy to find. That's not a small thing when you're the admin—the vendor who can't produce the right document makes finance angry and the plant manager nervous.
I want to say we've ordered from them for about three years—or maybe closer to four, I'm mixing it up with the year we changed logistics providers. The point is, Olin never made me feel like a nuisance because we only buy a few drums at a time. That matters. For a small operation, a chemical supplier that answers the phone is worth more than a slightly lower quote from a company that doesn't.
By law, every chemical supplier must provide a safety data sheet under OSHA's Hazard Communication Standard (29 CFR 1910.1200). If they can't or won't, walk away. I don't care how good the price looks.
"Does Epoxy Resin Air Dry?" The answer isn't yes
This question shows up constantly in craft and floor-coating forums. The answer is no. Epoxy resin cures by chemical reaction, not by evaporation. If you leave epoxy in an open bucket, it doesn't shrink like water-based paint. It heats up, crosslinks, and hardens. "Air dry" is something a clear coat or glue does; epoxy is a two-part system that needs the right resin and hardener mix.
I learned this the hard way on a small project. I tried to seal a nameplate with a "clear coat" that dried like nail polish. That was fine. Then I tried the same logic with real epoxy resin and didn't mix enough hardener. The surface stayed sticky for three days. I knew I should measure by weight, but I thought, "what are the odds?" Well, the odds caught up with me. That's a lesson I've never repeated.
For anyone searching epoxy resin dried flowers specifically: flowers need to be completely dry before you encase them. Even then, moisture trapped inside a stem can make the resin cloudy. Use a resin formulated for deep pours or casting, and pour in layers so the flowers don't float. It looks like a craft, but it's still chemistry.
Epoxy basement floor colors: the color isn't the problem
The other phrase that lands people here is epoxy basement floor colors. I get it. The Pinterest photos are bright, speckled, glossy, and impossible to ignore. But color is the last thing I think about when I specify an epoxy floor coating.
We did a maintenance-floor project in our facility, and I almost ordered ten gallons of a pretty pigmented epoxy because the color chip looked perfect. A knowledgeable contractor asked if we'd done a moisture test. We hadn't. The slab had a vapor emission problem. If I'd rushed straight to color, the coating would have bubbled and peeled. The surprise wasn't the color—it was how much prep work the "simple" floor needed.
So if you're choosing epoxy basement floor colors, choose the system first. Check whether the product is self-priming, what its moisture limit is, and what the recoat window says. Then pick the gray. Or the blue. Or the "I'm sorry, but that's too much flake" look. Just don't expect epoxy to behave like air-dry paint.
Searching "Olin Mathieson Chemical Corporation mesothelioma"? Let's be careful.
Some of you aren't here for craft resin or floor dyes. You're here because of an old corporate name: Olin Mathieson Chemical Corporation. If your search includes the word "mesothelioma," this article isn't the right place for legal or medical answers. I'm not an attorney, and I'm not a doctor.
What I can tell you from a purchasing perspective is this: corporate names in the chemical industry are messy. Old names get attached to old products, plants close, divisions sell, legal entities merge. If someone is researching a historical exposure, the exact time period, plant location, and product matter far more than the corporate logo on a modern website. Verify what you're looking at. If you have a legal question, speak to a qualified attorney who handles these cases.
Small buyers deserve straight answers
I don't mind when suppliers have minimum order quantities. I do mind when a small buyer gets treated like a waste of time. The vendor who couldn't produce a proper invoice cost us $2,400 in rejected expense reports. The supplier who ghosted us on a $300 order? They don't get to bid on the $14,000 order we placed a year later. I'm not angry about the ghosting. I just don't make plans with people who don't show up.
It also took me three wrong deliveries to create a proper order checklist. Should have done it after the first one. Now every supplier has to pass the same gate: SDS, invoice format, lead time, and one person who answers the phone. That's not about demanding special treatment. It's about knowing that a vendor who treats a $200 order like a nuisance will be exactly the same when the order grows to $20,000. In our 2024 vendor consolidation project, I used a simple test: who answers a basic question within 24 hours? The vendor list got shorter. I'm okay with that.
Small doesn't mean unimportant. It means potential. The buyer asking a basic question is the safest kind of customer to work with because they're not assuming.
Some will say, "If you're not willing to read the product page, that's on you." Fair enough. I read the pages. But a product page doesn't tell you whether your basement slab has moisture problems. It doesn't tell you if old flowers are dry enough. It doesn't tell you which entity used a particular process in 1975. Those answers come from a human who takes the question seriously—no matter how small the order.
So here's my final position, and I'm not going to soften it: Epoxy resin does not air dry. Small orders don't deserve small answers. And if a vendor won't take you seriously at $200, they won't take you seriously at $20,000.
That's not a speech. It's the reason I still do this job.