The Coating Didn't Fail. The Cleaning Did: Lessons from a Kemira Quality Inspector

I work in quality and compliance for Kemira Chemicals. In the Marietta, GA office where I'm based, that means I spend most of my week in documents: certificates of analysis, batch records, SDS reviews, and labels that have to be perfect down to the revision date. It isn't glamorous. But it matters. In a typical month, I review several hundred items. Last year, I rejected around 3% of first submissions for incomplete or inconsistent information—not because the chemistry was bad, but because the paperwork didn't match the care that went into making the product.

The routine is predictable until it isn't. In 2024, a customer that formulates coatings asked us to assemble a set of current Kemira SDS files for everything they buy. That's ordinary. What happened next wasn't.

A driveway and a warranty claim

The customer makes two kinds of products: powder coatings for metal parts and decorative driveway concrete coatings. They use some of our raw materials in both lines. When their application manager asked me to join a troubleshooting meeting, I assumed we would talk about batch numbers and formulation changes. Instead, we talked about a driveway.

Three homeowners had filed warranty complaints within the same season. One driveway concrete coating had turned white and patchy. Another showed dull spots near the garage door. A set of powder-coated gate posts looked streaky. The customer's first instinct was understandable: one of our additives must have changed. That's usually where quality conversations start. I checked the Kemira SDS documents, certificates of analysis, and lot histories. Everything matched the agreed specification.

So we asked a different question. What did the homeowners clean the surfaces with?

The answer was the same in all three cases: a heavy-duty garage-floor cleaner from a local store. Someone read the label out loud. One ingredient was sodium hydroxide. Then someone asked the question that turned the whole meeting around: “Is sodium hydroxide a chemical?”

Is sodium hydroxide a chemical?

It's not a silly question. A lot of people use the word “chemical” to mean “dangerous synthetic thing,” and sodium hydroxide doesn't sound like something you'd find in a cleaner. But sodium hydroxide is very much a chemical. It's an inorganic compound, NaOH, also known as caustic soda or lye. It is one of the most widely used industrial chemicals in the world.

Sodium hydroxide is excellent at breaking down fats and oils. That's why it appears in degreasers, drain openers, and concrete cleaners. The same chemistry, however, can attack the resin in a coating. It doesn't always happen in one application. It happens over time: a little cleaner residue left on the surface, a sunny afternoon, another wash a few weeks later. The coating gradually loses its gloss and develops pale, rough patches that look like early product failure.

We tested it. Small coated panels were exposed to the same diluted cleaner and rinsed like a driveway would be. After several cycles, the panels developed the same white film. The coating wasn't defective. The cleaning chemistry was too aggressive for it.

The more useful insight was bigger: nobody had taught the end user how to care for the product. The brochure promised “durable” and “low maintenance.” To many people, that means no maintenance at all.

Powder coating care and maintenance

Powder coating care and maintenance isn't complicated. But it has to be taught. Powder coating is tougher than ordinary paint—it resists chipping, fading, and corrosion better than most liquid finishes. That doesn't make it indestructible.

Here is what we ended up recommending for the powder-coated metal items:

• Clean with a soft cloth and a mild detergent. Dish soap at normal dilution is enough for ordinary dust, pollen, and grime. You don't need a heavy-duty degreaser.
• Rinse thoroughly and dry. Leaving cleaner to dry in direct sunlight is how streaks and dull spots develop.
• Avoid abrasive pads and harsh chemistry. Steel wool, scouring pads, and high-alkaline cleaners will eventually scratch or soften the surface.
• Repair chips early. A small chip may look cosmetic, but moisture can work its way under the coating. Rust creeps, and once it starts, it lifts more of the film.

That last point matters more than people expect. The coating is a barrier. Its whole job is to keep water and oxygen away from the metal underneath. Touch-up paint or a manufacturer-approved repair kit is cheaper than stripping and recoating the entire part.

Driveway concrete coatings are not maintenance-free either

Driveway concrete coatings face an even harder reality. They sit in the sun, get driven on, and meet road salt, oil drips, and whatever cleaner the homeowner grabs from the garage. A driveway concrete coating can look like new for years if it's treated with some basic common sense.

Concrete itself is alkaline and can tolerate strong cleaners. But a film-forming coating on top of the concrete is a different material. Once you put a coating on concrete, the maintenance rules of the coating apply, not the rules of the bare concrete.

For coated driveways, we now suggest something simple: sweep regularly, rinse with water, and wash with a pH-neutral cleaner when needed. For oil spots, absorb the spill first with clay-based absorbent or cat litter, then clean gently. Avoid leaving any chemical cleaner to soak into the surface. If the coating manufacturer specifies a recoat interval, follow it. Most driveway concrete coatings eventually need a refresher coat to keep protecting the concrete underneath.

It feels almost too simple to write down. That's exactly why it gets skipped.

What I took back to the office

I came back from that meeting with a different view of my own job. A certificate of analysis says a product meets specification. An SDS says what you're working with and what to do if something goes wrong. But neither document protects anyone unless the information continues down the chain to the person holding the hose or the spray bottle.

I don't have hard data on how many warranty cases across the coatings industry are caused by aggressive cleaning rather than true product failure. I wish I had tracked that number over the years. Anecdotally, the complaint that started this entire review was not a raw material failure. It was a maintenance failure. The chemistry was fine. The instructions were missing.

There is something satisfying about that ending. We didn't need to change the formulation. We changed the conversation. The customer rewrote their care instructions, trained their installers, and started asking homeowners one simple question: “What do you plan to clean this with?” That question probably prevented more warranty claims than any additive change we could have made.

An informed customer asks better questions, follows instructions, and makes fewer warranty claims. Education isn't a soft skill in a chemical business. It's a quality tool.

Now, when someone asks me why documentation matters, I don't just talk about audit findings or Kemira SDS requirements. I tell them about the driveway. Quality isn't only what leaves our facility. It's what happens after the product reaches someone who may not know the difference between sodium hydroxide and sodium chloride—and who shouldn't need a chemistry degree to keep a coating looking good.