Shielding built into the fiber. Not bolted on.
STM's EnCap™ process chemically bonds silver to every fiber, so the shield is the material — not a coating that cracks at the flex point, lifts at the seam or gives up in the environment. Engineered, converted and delivered from bulk roll to finished part by one U.S. engineering partner. Proven on the most demanding defense programs since 1955.
[ video pending the re-edit of the old-CEO cut ]
No identifiable hardware
Shielding rarely fails on day one. It fails in service.
Most shielding is an add-on — foil, mesh, sprays and surface-deposited coatings applied to a design after the fact. On the bench, it passes. Then the program gets real.
Where add-on shielding gives up
Surface deposits crack and shed. Conductivity drops with every cycle.
Foil tears, tape lifts, and the seam becomes a slot.
Fluids, salt fog, UV and thermal swings find every place a surface coating is thin.
Metal, foil and fasteners win the shielding argument and lose the ounces.
Foil is a vapor barrier. Moisture collects, mold follows, and finished construction gets reopened.
When shielding fails, it never fails small. Discovered at qualification, it's a redesign and a retest measured in months. Discovered in the field, it's a grounded asset, a recall, or a wall that has to come down. And the engineer who chose the material owns the failure.
How EnCap™ answers it ↓
What it does in service, in the numbers you qualify against.
Four applications, told at the altitude our customers' programs allow.
A conductive ground plane at 0.7–1.5 oz/yd² — instead of metal.
The situationA composite airframe with no metal skin to carry lightning current or ground the electronics, and no ounces to give back to foil and fasteners.
What STM deliveredA ground plane and lightning-strike path at fabric weight, integrated into the structure — and, as the program matured, a finished, coated, laminated appliqué. On the program for decades.
500% elongation, <1.5 Ω/sq, −40 dB at 1 GHz — in a material you can cut, sew and bond.
The situationA wearable or pressure-mapping sensor that has to stretch, breathe, touch skin — and read the same on patient 100,000 as on the prototype.
What STM deliveredHigh-purity silver bonded to a nylon/Lycra spandex, engineered for extended skin contact, with the bond built to hold resistivity through stretch and wear. (Data sheet SMS-0155.)
A SCIF wall that meets the spec — and stays dry.
The situationHigh attenuation needed across the wall, the seams and the penetrations, an inspection coming, and foil's vapor barrier waiting to grow mold behind finished drywall.
What STM deliveredSwiftShield™ breathable woven and non-woven shielding, tested in a structure built to ICD/ICS-705 and IC Tech Spec v1.5.1 methods across 13 material configurations.
−65 to −70 dB at 1 GHz, installed with the crew you already have.
The situation5G densification flooding the rack, the shelter or the cell-site enclosure — and foil, cans and gasketing too heavy, rigid and slow to install at facility scale.
What STM deliveredLight, conformable conductive fabric in 36" to 76" rolls at 1.4–3.0 oz/yd² (ASTM D4935), cut, hung and wrapped on site as RF blankets, barriers, harness wraps and liners.
Where does your system have to work?
For the engineer whose program will ask about Berry, traceability and qualification before it asks about price. Conductive ground plane, lightning strike protection, EMI/RF signal management, ESD, shielded enclosures and cases.
Aerospace & Defense →For the device engineer who needs conductivity that stretches, breathes and touches skin — and a partner who moves at device-program speed. Pressure mapping, biosensors, wearables, defibrillation components.
Medical & Wearables →For the facility or product engineer fighting signal flooding. Data-center and cell-site shielding, harness wraps, RF blankets and barriers, EMI gaskets.
Telecom & Industrial →For the SCIF integrator, facility security officer or architect who has to pass accreditation and never open the wall again. SwiftShield™, window coverings, lab shielding, portable enclosures.
Architectural & Secure Facilities →New to conductive textiles? Every industry page starts with the engineering problem, not the product.
EnCap™ bonds silver to every fiber. Not a coating that sits on top.
encapsulated fiber (existing asset)
encapsulated fiber (existing asset)
STM's EnCap™ process forms a chemical, molecular-level bond between the metal and the fiber, encapsulating each fiber 100% — every filament, every side, all the way around. The base fabric keeps its stretch, drape, tear strength and breathability. The conductivity becomes a property of the material rather than a layer on it.
What you get: shielding from −42 dB at 0.7 oz/yd² to −70 dB at 3.0 oz/yd² (ASTM D4935, 1 GHz) from a fabric that survives the environment and integrates where foil and metal physically can't.
We don't publish the chemistry. We publish the micrographs, the data sheets and the independent shielding curves.
How EnCap™ works →The considerations our engineers walk through with every customer — breathability, conductivity, shielding, flex, abrasion, weight, width and skin contact — with the standard line's data-sheet values side by side. [ Data model: attribute → product family, per the LM Skunk Works slide-6 pattern ]
Custom engineering, fiber to finished part.
One engineering relationship covers the construction, the bond, the converting and the proof. This is what happens between your call and your drawing.
Engineer the construction
Knit, woven, non-woven, hook & loop or spandex. Silver, or nickel over silver. Base fabric, weight and width set for your frequencies, flex and environment — from the standard line or adjusted.
Bond the metal to the fiber
EnCap™ forms a chemical, molecular-level bond that encapsulates each fiber 100%. The fabric keeps its stretch, drape, tear strength and breathability; the conductivity becomes a property of the material.
Convert it into your part
Urethane, polyvinyl and silicone coatings. Pressure-sensitive, conductive and hot-melt lamination; carrier films. Absorbers integrated into tapes and appliqués. Slit, die-cut, CNC-cut, sewn or ultrasonically bonded to your drawing.
Prove it, then keep it identical
In-house electrical, mechanical, RF (30 MHz–1.5 GHz, 2–18 GHz) and environmental characterization to ASTM methods. An independent free-space shielding curve, 2–40 GHz, on every fabric data sheet. First-article support, full lot traceability, no substitutions.
Tested the way a SCIF is built.
Method. NPB20NS, NPB20N3S and W077NS, all 36" wide, across 13 material configurations — measured pre-installation, after seam taping and after the second drywall layer. Nine antenna locations, two polarizations: 18 measurements per test cycle, in a structure built to ICD/ICS-705 and IC Tech Spec v1.5.1 methods.
Also on the page: the mold-growth time-lapse — foil versus SwiftShield™, side by side.
Most of the data that proves STM works belongs to the programs it protects. This is the proof we can publish.
Have an RFQ and a clock? Skip the education.
Certifications, the Berry statement, part numbers, specs, Terms & Conditions of Sale and an RFQ path that accepts drawings — on one page, in the order your scorecard asks for them. [ Contact-time commitment pending Brian × Rick: 24-hour contact · 6–8 week typical lead time → FAQ ]
Get an engineer on it before the next design review.
Day-one dB is the easy part. Bring the failure mode, the frequencies and the constraints, and get shielding that is a property of the material — from one U.S. partner, fiber to finished part.
No cost · An engineer answers, not a form letter · Working under ITAR? Share only what you can · Berry-compliant, U.S.-made
Both CTAs route to their landing pages — no form on the homepage. The Talk to an Engineer form carries a [ Project timeline ▾ ] field that routes RFQ-in-hand visitors to the expedite lane.
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