Custom Energy & Power Materials: Busbar & Transformer Insulation, Inverter TIMs, EMI Gaskets, Outdoor Enclosure Seals, Arc & Fire Barriers
H-O Products converts aramid paper (Nomex), polyimide (Kapton) film, AeroZero® polyimide-aerogel film, mica barrier sheet, glass-epoxy laminate (G10/FR4), glass-fiber paper, boron-nitride silicone thermal pads, graphite heat spreaders, conductive EMI elastomers, EPDM foam, closed-cell silicone sponge, fluorocarbon (FKM) and rebonded neoprene into die-cut busbar and phase barriers, transformer layer and coil insulation, inverter thermal-interface and gap-filler pads, board- and cabinet-level EMI gaskets and ground pads, outdoor door and entry seals, arc and fire barrier stacks, transformer-oil and chemical-resistant flange gaskets, machinery isolation pads, and shipping protection for utility, generation, renewable, and balance-of-plant equipment.
Material grades are referenced by designation (UL 94, MIL-DTL-83528, IEC 60529, NEMA 250, ASTM, IEEE, IEC) per the vendor TDS. Made to your drawing under an ISO 9001:2015 certified quality management system in Winsted, Connecticut.
Where do you need a converted part?
Every application area is a dedicated page with its material families, failure modes, decision matrix, and its own intake form. All twelve publish together with this hub. Pick the area that owns your problem; H-O converts the parts for it to your drawing.
Insulation & Arc Safety · 01
Busbar, Transformer & Power-Distribution Insulation
Solid dielectric that insulates MV/LV distribution gear by three axes at once: thermal class (IEC 60085 / IEEE C57, Class R 220 °C the current top designation), dielectric strength per gauge (ASTM D149), and creepage/clearance (IEC 60664-1) — aramid paper, polyimide film, mica sheet, and glass-epoxy laminate to the drawing.
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Insulation & Arc Safety · 02
Arc-Flash & Fire Protection
Inorganic and glass-reinforced barrier materials — mica containment faces, glass-epoxy phase plates, glass-fiber and ceramic paper, Durostone composite — converted into phase barriers, compartment fire barriers, and cable-penetration stacks for substations, generation, and BESS. Arc ratings belong to the tested assembly (IEEE C37.20.7) and the PPE program, never to a material.
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Thermal & EMI · 03
Power Electronics TIMs & High-Temperature Insulation
The two thermal jobs in a utility inverter or converter: the path off an IGBT/SiC module (the interface pad is roughly 60% of junction-to-sink resistance, so it is sized by resistance at pressure per ASTM D5470) and the boundary of the cabinet (mica, ceramic paper, glass-fiber paper). Reinforced silicone-fiberglass where the joint must also insulate; graphite where it may conduct.
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Thermal & EMI · 04
Power Systems EMI Shielding
The continuous low-impedance bond that keeps an inverter, VFD, or storage PCS inside its emissions target (IEC 61800-3 category, CISPR 11 class): conductive MIL-DTL-83528 elastomer and fabric-over-foam gaskets, ground pads, and foil-tape seam bridges — with the filler chemistry matched to the housing metal for galvanic compatibility before resistivity is optimized.
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Sealing & Fluids · 05
Outdoor Power & Substation Sealing
Environmental seals for pad-mount transformers, switchyard cabinets, and solar/wind BOS enclosures, built toward a NEMA 250 Type (3R/4/4X) or IEC 60529 IP code: EPDM for UV/ozone, closed-cell silicone (UL 94 V-0) for wide temperature and salt fog, solid-silicone grommets for entries, and an ePTFE vent for the breathing-condensation fix.
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Sealing & Fluids · 06
Transformer Oil & Chemical-Resistant Sealing
Bolted-flange, hand-hole, manway, radiator, bushing, and load-tap-changer gaskets for oil- and ester-filled grid apparatus, chosen from the ASTM D471 immersion-swell table for the actual fluid: nitrile for mineral oil, FKM for hot oil and aggressive chemistry, fluorosilicone for wide-temperature oil, cork-nitrile and non-asbestos sheet for the bolted flanges — with an explicit re-check for ester (FR3-class) fluids.
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NVH · 07
Power Equipment Vibration & Acoustic Control
Load-bearing isolation pads, anti-vibration washers, constrained-layer damping patches, and sound-barrier layers for transformer and reactor hum (twice line frequency, 100/120 Hz), genset skids, BESS HVAC, and nacelle auxiliaries — specified by natural frequency relative to the forcing frequency and sized to keep sustained bearing stress in the pad's working range.
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Bonding · 08
Power Equipment Bonding Tape & Shipping Protection
The assemble-and-protect set for outdoor apparatus: low-surface-energy acrylic-foam tape for powder-coat and galvanized nameplate and panel bonds, transfer and double-coated adhesives for rating labels, silicone/acrylic hybrids near hot tanks, plus density-matched polyethylene dunnage, felt and cork-rubber wear pads, and low-tack surface-protection film for freight. Substrate and surface energy decide the tape first.
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Energy Sectors · 09
Solar & PV Infrastructure
The soft-goods set that keeps a PV balance-of-system weather-tight, cushioned, insulated, and durable across a 25-year field life: combiner/inverter enclosure gaskets (built toward IP65/IP66, NEMA 4X), cable and J-box seals (IEC 62790 / 62852 context), inverter TIM pads, module-frame edge protection and setting blocks, UHMW-PE/PTFE tracker bearing wear strip, and rooftop mounting isolation pads.
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Energy Sectors · 10
Hydrogen — Fuel Cell & Cryogenic Systems
Converted gaskets, dielectric barriers, and insulation for electrolyzer and fuel-cell balance-of-plant and cryogenic-adjacent hardware, selected by the fluid, temperature, and chemistry per the vendor TDS: fluoroelastomer (FKM/FFKM) and ePTFE for aggressive chemistry, and inorganic barriers where temperature or fire duty pushes the answer inorganic. Chemical, hydrogen-adjacent, and cryogenic ratings belong to the tested system.
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Energy Sectors · 11
Nuclear & SMR (Balance-of-Plant, Commercial-Grade)
Commercial-grade gaskets, dielectric and high-temperature barriers, thermal pads, EMI gaskets, and isolation pads for the non-nuclear-safety balance-of-plant and I&C side of conventional plants and SMRs, where radiation ages elastomers (EPDM holds properties furthest; polyimide is the most radiation-resistant common polymer). Class 1E, seismic, environmental, and any 10 CFR 50 App. B / NQA-1 qualification are the customer's program — H-O is ISO 9001:2015 certified only.
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Energy Sectors · 12
Battery Energy Storage (BESS)
The full-system materials set for grid-scale and commercial battery energy storage, framed by UL 9540 listing, UL 9540A test data, and NFPA 855 at the installation level: thermal-runaway and fire-barrier layers (ProCell cellular silicone, ArmaGel aerogel, AeroZero film, mica, ManniGlas), PCS thermal interface pads and EMI gaskets, 1000–1500 VDC busbar and DC-bus insulation, container door sealing with ePTFE venting, and HVAC isolation — with the cell- and module-level deep dive on the EV & Battery hub’s BESS page. Barrier and propagation results belong to the tested system, never to a material alone.
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Engineering resources for energy, power & renewables
Selection guides, failure-mode notes, and project work from H-O engineering, matched to the applications on this page.
Send a drawing, BOM, or a description of the application and what the part must do, and an engineer typically responds within one business day with a material-family direction and the matching application page. Material grades are referenced by designation per the vendor TDS; enclosure, EMC, arc, dielectric-coordination, battery, and nuclear qualification belong to the equipment maker's program. Volumes, install method, and documentation requirements are reviewed at quote.
Last updated · Reviewed by H-O Products engineering (ISO 9001:2015 certified converter, Winsted, CT).
Get an energy & power materials quote
Send a drawing, a system-manual page, or a spec section; partial information is welcome. We typically respond within one business day with a material-family recommendation, the vendor technical data sheet behind it, a prototype lead time, and an honest note on anything that needs a listing holder or a sealant maker rather than a converter.