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Three finishes, three different jobs. This page lays out what each one is actually good at, what it costs you dimensionally, what it will not tolerate, and — the part most comparison charts leave out — when each one is the wrong answer.
Request a Quote(972) 475-2726The default for production metal parts that fit an oven. Best cost per part at volume, thick and tough film, huge color range, essentially no VOC. Ruled out by anything that cannot see roughly 350–400°F and by close-tolerance features you do not want to mask.
The answer when the part cannot be baked, will not fit an oven, needs a specification that has no powder route, or needs a genuinely thin film. It is also the only one of the three you can touch up in the field — several MIL specs write touch-up kits into the spec itself.
A thin-film ceramic. Chosen when tolerance is the constraint: roughly 0.75–1 mil, so threads, bores and sliding fits can often be coated without masking. Air-cure grades put no heat into the part at all, and the high-temperature grades go far beyond what powder or ordinary liquid will hold.
Check marks mean this is what the finish is routinely chosen for. A half mark means it can do it with the right product or process, but it is not the obvious pick.
| What you need it to do | Powder | Liquid / MIL-spec | Cerakote |
|---|---|---|---|
| Film & dimensions | |||
| Thin film for close-tolerance work | – | ● | ✓ |
| Threads & bores coated without masking | – | ● | ✓ |
| Thick barrier film over rough or pitted steel | ✓ | ✓ | – |
| Environment & performance | |||
| General outdoor corrosion protection | ✓ | ✓ | ✓ |
| Marine / severe coastal service | ● | ✓ | ✓ |
| Abrasion and wear resistance | ✓ | ● | ✓ |
| Impact and chip resistance | ✓ | ✓ | ● |
| Exterior UV and color hold over years | ✓ | ✓ | ● |
| Chemical and fluid resistance | ✓ | ✓ | ✓ |
| High service temperature | ● | ● | ✓ |
| Lubricity / low friction | – | ✓ | ✓ |
| Substrate & process | |||
| Heat-sensitive parts and assemblies | – | ✓ | ✓ |
| Plastics, polymers and composites | – | ✓ | ✓ |
| Parts too large for an oven | – | ✓ | ● |
| Field touch-up and repair | – | ✓ | ● |
| Specification & compliance | |||
| MIL-spec and CARC systems | ● | ✓ | – |
| Aerospace primer / topcoat specifications | – | ✓ | – |
| AAMA architectural qualification | ✓ | ✓ | – |
| Near-infrared signature control (CARC) | ● | ✓ | – |
| Essentially zero VOC | ✓ | – | – |
| Commercial | |||
| Lowest cost per part at volume | ✓ | ● | – |
| Widest color and gloss range | ✓ | ✓ | ● |
| Single-piece and prototype work | ● | ✓ | ✓ |
“Liquid / MIL-spec” covers a wide family — epoxy primers, polyurethane topcoats, CARC, zinc-rich primers and dry film lubricants all behave differently. Where the distinction matters, it is called out in the sections below.
One mil is 0.001 inch, or 25.4 microns. Coating lands on every surface, so a hole loses roughly twice the film thickness on the diameter.
| System | Typical dry film | Where the number comes from |
|---|---|---|
| Powder, general industrial | 2.0 – 3.0 mils | Manufacturer data sheets commonly specify 1.5–4.0 mils; 2.5–3.0 is the usual working target |
| Powder, architectural (AAMA) | 1.2 mil minimum | AAMA 2604 and 2605 minimum dry film; AAMA 2603 is 0.8 mil |
| Powder, TGIC-free polyester ceiling | ~3.5 – 4.0 mils | The cure reaction releases water, which causes pinholes above this build |
| CARC topcoat | 2.5 ± 0.5 mils | MIL-DTL-53072G applied film thickness |
| CARC full stack (pretreat + primer + topcoat) | ~4.0 – 5.5 mils | MIL-DTL-53072G layers totaled |
| Aerospace epoxy primer | 0.6 – 0.9 mil | MIL-PRF-23377 / MIL-PRF-85582 |
| Aerospace primer + polyurethane topcoat | ~2.3 – 3.2 mils | MIL-PRF-23377 or 85582 plus MIL-PRF-85285 |
| Dry film lubricant | 0.3 – 0.5 mil | MIL-PRF-46010 / MIL-PRF-46147 |
| Cerakote H-Series | 1.0 mil (2.0 on some colors) | Cerakote H-Series technical data sheet |
| Cerakote Elite / E-Series | 0.60 – 1.10 mil, target 0.75 | Cerakote E-Series technical data sheet |
| Cerakote C-Series (air cure) | 1.0 – 2.0 mils | Cerakote C-Series data |
| Cerakote Micro Slick C-110 | 0.10 – 0.50 mil | Cerakote C-110 technical data sheet |
The practical rule: at 3 mils, a 1.000″ bore finishes near 0.994″. At 0.75 mil it finishes near 0.9985″. If a feature has to gauge or press-fit, that difference is the whole decision — and it is why we run all three processes rather than arguing that one of them is best.
A cure oven is a thermal cycle applied to your part. For a lot of assemblies and heat-treated materials, this table is the entire conversation.
| System | Cure | What it rules out |
|---|---|---|
| Powder, standard | ~10 min at 400°F part metal temperature | Anything that cannot see 400°F: most polymers, sealed assemblies, bearings, seals, wiring, adhesives |
| Powder, low cure | ~7–10 min at 340°F, specialty grades lower | Still an oven cycle — helps with temper-sensitive alloys, does not help with polymers |
| Liquid, ambient cure | Air dry at room temperature | Nothing thermally. Needs cure time and a controlled environment |
| Liquid, force dry | Typically 145–165°F for 20–30 min | Very little — this is below the point where most substrates care |
| Cerakote H-Series | 250°F for 2 hr (150–180°F for polymers and composites) | Little. Below the tempering range of most hardened steels |
| Cerakote Elite | 300°F for 1 hr | Little |
| Cerakote C-Series / Micro Slick | Air cure — tack free 45–60 min, full cure at 5 days | Nothing thermally. Plan for the five-day cure before the part goes into service |
| Cerakote Glacier | Air cure | Nothing thermally |
Cure temperatures are part metal temperature, not oven air temperature, and the governing figure is always the specific product data sheet. Cerakote’s air-cure grades reach handling strength in about an hour but do not reach rated chemical and abrasion resistance for five days — worth knowing before you put the part into service.
Coatings almost never fail because the coating was wrong. They fail because of what was underneath. Pretreatment is not a line item to value-engineer out — it is most of the corrosion performance you are buying.
Abrasive blasting does two separate jobs, and both belong on your drawing: it removes what is on the surface (cleanliness) and it creates the roughness the coating keys into (anchor profile, measured per ASTM D4417).
A conversion coating gives the film something to bond to chemically and adds corrosion resistance in its own right. Which one depends entirely on the substrate.
The three prep failures we see most often, in order: silicone contamination from an upstream process (concentrations as low as 0.001% cause plant-wide fisheyes, and it travels by aerosol); flash rust forming between blast and coat, which needs re-cleaning rather than coating over; and castings that were never degassed, which pinhole through the film during cure.
A part can be tack-free in an hour and still days from its rated properties. Cerakote’s air-cure grades reach full cure at five days. Plan the shipping and assembly schedule around the real number, not the touch test.
Required on high-strength steel that has been electroplated or acid cleaned — ASTM B850 starts at roughly 145 ksi tensile or 31 HRC and scales the bake time with strength. Blasting and coating do not introduce hydrogen; plating and pickling do.
Not automatic. A cured powder film is a dielectric, so a second electrostatic coat will not deposit normally, and some powder chemistries need scuff sanding for intercoat adhesion. It is a process to qualify, not a step to assume.
Certificate of Conformance ships with every order. Anything beyond that — salt spray, cross-section thickness, adhesion, AS9102 first article — has to be on the purchase order at the time of order, because it usually means running test coupons with your load.
We run all three, so we have no reason to oversell any of them. Here is where each is genuinely a bad choice — including when the right answer is something we do not do.
the part cannot see roughly 350–400°F; it is a polymer, composite or an assembly containing seals, bearings, wiring or adhesive; it will not fit an oven; you need a film thinner than about 2 mils; the print calls out an aerospace primer or topcoat specification; or the part will need field touch-up over its life.
you want the lowest cost per part on a high-volume production run that fits an oven, and none of the constraints above apply. Powder will usually be cheaper, tougher per mil, and better on VOC. Liquid also carries pot life, ambient window and solvent handling that powder simply does not.
film build is the protection — on pitted, weathered or edge-heavy structural steel, a 1-mil film has far less margin than a thick powder film. Also not the answer where the print calls out an AAMA architectural class or a qualified MIL-spec system, or where you need sacrificial galvanic protection. There is no zinc-rich Cerakote.
And when none of us are the answer: if the part needs sacrificial corrosion protection in a severe environment, hot-dip galvanizing or a zinc-rich primer system will outperform any barrier coating on this page — because they corrode instead of your steel rather than merely covering it. If the requirement is hardness and wear on a precision surface, hard anodize, nitriding or thermal spray are the right family, not paint. We would rather tell you that than take the order and have it come back.
It depends entirely on what is trying to destroy it. For impact and chip resistance on a part that lives outdoors, a well-applied powder film is very hard to beat per dollar. For abrasion and wear on a sliding surface, Cerakote wins on hardness at a fraction of the film. For chemical agent resistance and decontamination, CARC exists because nothing else does that job. Anyone who tells you one finish is simply the most durable is selling one finish.
No — they are different in kind. Cerakote is a thin-film ceramic sprayed as a liquid, typically 0.75–1 mil, and several grades cure at ambient temperature. Powder is an electrostatically applied thermoset that melts and flows in an oven, typically 2–3 mils. The tolerance and heat differences are the reason to choose one over the other, not the price.
Routinely, yes — with the right conversion coating. The caution is heat-treated tempers. A standard 400°F cure sits above where 6061-T6 is artificially aged, and published testing found high-temperature cure negatively affected mechanical properties in 2024-T3, 6061-T6 and 7075-T6. For structural or flight-critical parts we recommend a low-cure powder, a liquid system, or coupon testing your engineering group approves.
Chemical Agent Resistant Coating. It is a polyurethane topcoat system specified for military ground equipment that has to survive chemical decontamination and that also controls near-infrared reflectance so vehicles do not stand out under night vision. If your print calls out MIL-DTL-53039 or MIL-DTL-64159, you need it. If it does not, you almost certainly do not.
For long exterior color and gloss retention, the architectural powder hierarchy is the clearest published answer: AAMA 2603 is a one-year Florida exposure class, 2604 is five years with 30% gloss retention, and 2605 is ten years with 50%. Fluoropolymer powders are what reach 2605. Cerakote publishes color stability by temperature rather than by exposure years, and its color stability limit varies by color code.
All of them. Powder at 2–3 mils per surface, an aerospace liquid stack around 2.3–3.2 mils total, Cerakote at roughly 0.75–1 mil, dry film lubricant at 0.3–0.5 mil. The film lands on both walls of a hole. Dimension for it, mask the feature, or authorize a post-coat chase — and put whichever one you want on the print.
Powder is the clear answer on VOC — it is grouped by EPA among low- and no-VOC coatings, with blocked-isocyanate polyurethane powders the one exception, and overspray can be reclaimed. Liquid coatings carry solvent, though waterborne and high-solids systems have narrowed the gap considerably and several MIL specs now mandate low-VOC and chrome-free formulations.
Yes, and sometimes that is the right answer — a zinc-rich or epoxy primer under a topcoat, or masked zones with different finishes for grounding or wear. Recoating over cured powder is the one combination that needs qualifying rather than assuming, because a cured powder film is a dielectric and some chemistries need scuff sanding for intercoat adhesion.
Wall-format reference mapping every process we run to its governing specifications, film build and cure schedule.
Eighteen things worth knowing before your part reaches a coating line — dimensions, materials, prep and what belongs on the purchase order.
Every process, the substrates we handle, part-size capacity and the specifications each process meets.
Send the drawing, the service environment and any specification on the print. We will tell you what we would run and why.
