Structural steel coating
Steel structures, sealed for the long haul.
Metal roofs, canopies, stairs, towers, mezzanines and building steel all need corrosion protection that lasts. Applicators who understand prep and specs win steady commercial work.
The work
Commercial owners are tired of repainting
Rusting metal roofs, fasteners, gutters, canopies and stair towers are a constant line item for building owners, schools, ag operations and municipalities. Every repaint cycle costs access, labor and disruption.
A spray-applied system that seals seams and fasteners in one continuous film, flexes with thermal movement and takes a UV-stable topcoat is a different kind of fix, and an easy one to quote against another round of paint.
Why spray it
What a structural system has to do
Seal seams & fasteners
One film over laps, screws and welds, the places paint fails first.
Move with the steel
Metal expands and contracts every day. Elastomeric coatings go with it.
Done in a visit
Fast set and high build mean less time on lifts and roofs.
Look right for years
Aliphatic topcoats keep color and gloss on exposed steel.
How it’s done
A structural rust job, start to finish
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01
Survey
Grade the rust, check the existing coating’s adhesion and condition, and note access and safety needs.
Field note: An adhesion test on old paint tells you whether it stays or goes.
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02
Prepare
Blast where it’s practical; otherwise power-tool clean (SSPC-SP 3) and remove all loose material and contamination.
Field note: Pressure-wash first to get salts and dirt off before anything else.
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03
Treat the details
Seal laps, replace failed fasteners and detail seams and edges.
Field note: Fastener heads are the first place a roof rusts through.
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04
Prime & spray
Prime as specified, then build the coating to thickness and topcoat for UV.
Field note: Mind the dew point on early mornings and late afternoons.
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05
Inspect
Check thickness and coverage, document and photograph the finished job.
Field note: Owners love before-and-after photos. So do their neighbors.
Public bridges run on approved product lists
State DOT bridge work is usually specified from a qualified products list and inspected to the letter. Most applicators start with commercial and private structures, build a track record and documentation, then pursue spec work.
FAQ
Structural questions
Can a rusty metal roof be coated instead of replaced?
Often, yes, as long as the panels are structurally sound. Loose rust and failing paint are removed, fasteners and seams are treated, and the roof is primed and coated in a continuous film. Severely perforated panels get replaced first.
Will the coating fade in sunlight?
Aromatic polyureas are extremely tough but can darken or chalk in direct sun. Where color and gloss matter, an aliphatic topcoat goes over them. That is a normal part of specifying exterior work.
How long does a spray-applied rust coating last?
It depends on surface prep, film thickness, the environment and the system. A properly prepared and applied polyurea or polyurethane system protects for years, while oil- and wax-based rustproofing sprays are typically reapplied every year or so. Prep is the single biggest factor.
Get started
Win structural work
Tell us a little about you and what you want to protect. We’ll follow up with equipment options, training details and pricing, or connect you with a trained applicator if you need something coated.
- Takes about two minutes
- A real person follows up, not an autoresponder
- Equipment, training, materials and financing in one conversation
Backed by ArmorThane. Polyurea and polyurethane coatings manufacturer since 1989, Springfield, Missouri.