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Capabilities · Engineered, Built, and Certified Under One Roof
Failure starts at the seam. So we removed it.
Three manufacturing processes — rotational lining, rotational molding, and additive manufacturing — share one physics advantage: seamless construction, with no welds, joints, or crevices to fail. Behind all three: materials we formulate ourselves, and a turnkey shop that delivers the part finished, tested, and certified.
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✓ An engineer — not a queue — responds within one business day.
IMAGE — Production photography
(oven bay or demold moment)
AS9100 Rev D · ISO 9001 · ITAR · CMMC Level 2 · ASME · AWS B2.4 · ISO Class 7 Cleanroom · Made in the USA
Start with what you're making.
IMAGE — Bonded liner cross-section
Protecting metal equipment from corrosion?
A seamless thermoplastic liner, mechanically bonded to the metal you already own.
→ Rotational Lining
IMAGE — Demolded seamless part
Need a seamless part — tank, duct, vessel, container?
One molded thermoplastic part where there used to be a welded assembly.
→ Rotational Molding
IMAGE — Laser-sintered flight part
Complex flight hardware, no tooling budget or time?
Production laser-sintered parts, printed to print — qualified for aerospace.
→ Additive Manufacturing
Capability 01 — Rotational Lining
Keep the equipment. Lose the corrosion.
Rotational lining — a process RMB invented more than forty years ago — melts and mechanically bonds a seamless thermoplastic liner to the interior of your metal equipment. No adhesives to disbond. No sheet-lining weld seams to let go. The metal keeps its full structural integrity; the polymer takes the chemistry.
Built For
Pipe & spoolsTanks & pressure vesselsScrubbers & columnsFittings, pumps & valvesFlowmeters & filter housingsHeat exchangersCaissons & custom equipment
Why Engineers Choose It
Seamless by processNo weld joints — the failure point of sheet linings.
Mechanically bonded, no adhesivesNothing to disbond, and the liner withstands full vacuum.
Complex internals lined blindInterior surfaces are lined without access to them.
Engineered for the chemistryMaterial selected or formulated for your exact service, across the polymer's full temperature range.
Honest Limits
A shop process, not a field application; oven size sets the envelope; large internal baffles are difficult. If your application can't be rotolined — some process temperatures rule it out — we'll tell you fast.
Capacity: equipment to 10 ft diameter · pipe to 5 ft dia × 20 ft length · flange ratings ANSI 150–2500
Validation: liners to 0.50" thick — ultrasonic thickness gauging, spark testing, flange faces machined for sealing
Materials
PFAETFEPVDFHDPE lining gradeBIO-ARMOR™
PROOF — Lined pipe in 94–98% sulfuric acid at up to 300°F: zero failures in 25+ years. Liners engineered for 10–20 years where coatings last about five.
Explore Rotational Lining →
IMAGE — Lining bay
Bonded-liner cross-section
GRAPHIC — Seamless vs. seamed
IMAGE — Ferry oven / demolded duct
Demolded vessel
Cleanroom rotomolder (ISO 7)
Capability 02 — Rotational Molding
One seamless part where there used to be many.
Rotational molding produces thin-walled, hollow, seamless thermoplastic parts with tight tolerances and complex geometries — from proprietary resins, on comparatively affordable tooling. The seamless interior is the point: no weak points for chemical attack, no crevices for contaminants to collect. It's why the same process makes aerospace ducting and high-purity semiconductor vessels.
Built For
ECS & environmental ductingStorage tanks & vesselsDosing bottles & containersDrip pans, cylinders & threaded bottlesHigh-purity fluid handling — ISO Class 7 cleanroom
Why Engineers Choose It
Part consolidationOne molded part replaces a heavy, multi-piece welded assembly — cutting cost, weight, and installation labor.
Durability by designDimensional stability and impact strength that survive installation and maintenance abuse.
Lifetime ROIHigher return over the part's life than the assemblies it replaces.
Materials matched to the missionFlame-retardant aerospace nylons to high-purity fluoropolymers, formulated in-house.
Honest Limits
Production cost can exceed some alternatives at low complexity; plastics carry temperature limits; design changes require mold modification. This is engineered, high-performance molding — we don't do commodity work, and we'll say so if that's what the job needs.
PROOF — Hundreds of thousands of parts delivered to aerospace & defense · 45% ducting savings for a Tier 1 aerospace supplier · 10–15% per-part savings with tooling ROI in about a year on seamless dosing bottles.
Explore Rotational Molding →
Capability 03 — Additive Manufacturing (SLS)
Flight hardware, without the tooling.
RMB's selective laser sintering operation began life inside a major airframer — founded in 2001 to print production flight hardware, and the origin of the first defense specification for additive manufacturing. RMB acquired the operation whole in 2005 and has run it as a production shop ever since.
Built For
Production aerospace & defense ductingComplex interior componentsMetal & composite part replacementFast-turn development hardware
Why Engineers Choose It
No toolingDesign iterations move in days, and delivery timelines compress.
Proven, not promisedTest coupons built alongside every run for nondestructive validation of mechanical and chemical integrity.
Fully traceableMaterials and process documentation to aerospace standards, with in-process material recyclability.
Qualified where it countsLaser sintering qualified to a major airframer's commercial specification.
Capacity: eight SLS machines · 15" × 12" × 18" build volume
Materials: Nylon 11 (D-80) · flame-retardant Nylon 11 (FR-106, FAR 25.853 60-second vertical burn)
Explore Additive Manufacturing →
IMAGE — SLS machine bank
Sintered duct
Test coupons / build chamber
Value-Add & Turnkey
Everything after the polymer, handled.
The processes above are the middle of the job. The rest of it — the parts other shops outsource, and you end up coordinating — happens here, under the same roof and the same quality system:
ICON
EngineeringApplication review through complete subsystem design, with design for manufacturability built in.
ICON
ASME-stamped metal fabricationU-stamp vessels, R-stamp repair, B31.1/B31.3 piping — carbon steel, stainless, aluminum, exotic alloys.
ICON
AWS B2.4-certified plastic weldingPP, PVDF, and PFA.
ICON
Machining3-, 4-, and 5-axis CNC and lathe work, to finished tolerances.
ICON
Testing and NDEHydrostatic with actual service gaskets, spark, dye penetrant, pressure and leak — radiography coordinated, third-party witnessed tests managed.
ICON
CertificationASME Section VIII recertification managed, documentation delivered with the part.
ICON
Paint, assembly & logisticsCoatings and anodizing, fittings and instrumentation installed, pickup and return shipping handled.
One PO. One schedule. One accountable partner. Your equipment leaves once and comes back finished, documented, and on the date we said.
See Our Process →
DIAGRAM — Five vendors vs. one roof
(the chain, visualized)
Every process above starts in our materials lab.
Most manufacturers buy resin and hope it behaves. RMB formulates, compounds, cryogenically grinds, and tests its own — so the material is designed for the process, and the process is designed for the material. When the right polymer doesn't exist, we build it.
Explore Our Materials →
IMAGE — Materials lab
Tested here. Certified here. Made here.
In-House Testing
Hydrostatic · spark · pressure and leak · flammability · dimensional and CMM · melt-flow rate · particle size — with outside-lab partnerships for everything else.
Certifications
AS9100 Rev D · ISO 9001 · ITAR · CMMC Level 2 · ASME Section VIII Div 1 & Section IX · AWS B2.4 · ISO Class 7 cleanroom · ISTA 3A packaging
AS9100
ISO 9001
ITAR
CMMC L2
ASME
AWS B2.4
ISO 7
IMAGE — Facility / four-building campus, Fountain CO
94,000 SFFour buildings
8SLS machines
USAAll manufacturing
Rotational lining and molding ovens, a cleanroom rotomolder, a full CNC machining center, ASME fabrication, paint and bake-off, and a working materials R&D lab.
Tour the Facility →
Not sure which process fits? That's the first conversation.
Bring the application — a print, a photo, a problem description. An engineer will tell you which process fits, what material we'd run, and what it takes to prove it. And if none of them fit, we'll tell you that too, fast.
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Talk to an Engineer
✓ An RMB engineer reviews every inquiry and responds quickly — typically within one business day.
IMAGE — Engineer reviewing a print
at the shop floor