Frequently Asked Questions
The questions people ask once they realize these are two different product categories.
Comparing the Two
How many coats of rust proof paint equal one pass of polyurea?
By thickness, none of them do. Three coats of industrial paint reach roughly 6 to 9 mils of dry film. A single polyurea pass is 20 to 120 mils. You would need dozens of paint coats to match the film, and the accumulated inter-coat interfaces would create their own failure modes long before you got there.
Is rust proof paint ever actually better?
Yes, and in more situations than most coating salespeople admit. Small jobs where mobilization dominates cost, decorative and interior work where colour retention is the point, temporary or short-life assets, and anything you want to be able to touch up yourself with a brush. In those cases paint is the correct engineering answer, not a compromise.
Does polyurea contain rust inhibitors like paint does?
No. Inhibitive and zinc-rich paints work partly through chemistry that passivates or galvanically protects the steel. Polyurea is a pure barrier — it simply keeps water and oxygen away. Because it does that at 20 to 120 mils instead of 3, it does not need the chemistry to compensate for a thin film.
Which one handles a surface that already has rust on it?
Both can overcoat sound, tightly-adhered rust after SP3 power-tool cleaning, and neither can go over loose scale. The difference is what happens afterward: a 3-mil paint film over old rust is fragile, while a 20 to 40 mil membrane isolates the oxide from moisture and oxygen thoroughly enough to stop the reaction.
Practical Application
Can I brush or roll polyurea like I would paint?
No, and this is the single biggest practical difference. It gels 3 to 6 seconds after the components meet, so there is no working time at all. It requires a plural-component proportioner with heated hose. 7001 primer can be brushed or rolled, but the barrier layer cannot.
Can polyurea be applied over existing rust proof paint?
Usually yes, with 7001 primer, which promotes adhesion and blocks bleed-through from the old finish. Test adhesion on a small area first: if the existing paint tears within itself when pulled, the whole system has to come off regardless of what goes over it.
How do I touch up a scratch in polyurea?
Abrade the area, apply 7001 primer, and respray. That means calling whoever applied it rather than opening a can in your garage — a genuine convenience loss compared with paint. On the other hand, at 20 to 120 mils, most incidents that would go through a paint film do not go through the membrane at all.
Does polyurea need the same surface prep as paint?
Essentially the same standards: SP6 blast with a 2–4 mil profile for new or heavily corroded steel, SP3 power-tool for maintenance, and chlorides below 7 µg/cm² in salt service. Prep discipline determines the outcome for either product — it is not a place where the better coating rescues you.
Cost, Appearance & Buying
How much more expensive is polyurea than rust paint?
Considerably more per gallon, and there is a mobilization cost for the equipment. Installed cost per square foot narrows once you count three coats of labour and the cure time. Cost per year of service frequently favours polyurea outright. Which comparison is the right one depends on how long your asset has to last.
Will polyurea hold its colour like paint?
Not as well. Aromatic polyurea chalks and fades under direct UV within a few seasons. The protection is unaffected — it is purely a surface appearance change. If colour matters, either specify an aliphatic topcoat over the membrane or use quality paint and accept the shorter protection cycle.
Can I buy polyurea in small quantities like paint?
It ships in kits and drums rather than gallons off a shelf, and it only makes sense in quantities that justify running a rig. For a small job, hiring an applicator who already has material on the truck is usually cheaper than buying any amount of it yourself.
Do you sell rust proof paint too?
No — we manufacture polyurea, along with 7001 primer and related coating products. When paint is the right answer for your job we will tell you so, but you will buy it from a paint supplier. We would rather give you the correct recommendation than a convenient one.
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