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Start with the problem, not the roll.

Elastomers Knits Wovens Non-wovens Browse all materials & the comparison tool →

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Where your system has to work.

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How the material is made — and finished.

EnCap™ Technology Material Characterization Testing

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Data you can defend in a review.

Spec Sheets Case Study — Architectural Shielding FAQs Compliance, Certifications & Awards

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PHOTO — macro of fabric weave at magnification, darkened · full-bleed behind the copy

Home → Materials

Materials

Conductive fabrics engineered to spec

Silver and nickel/silver knits, wovens, non-wovens and hook & loop. Shielding effectiveness from −40 dB to −70 dB at 1 GHz, weights from 0.7 oz/yd², widths to 76". Filter below, compare what fits, and request a sample.

Browse all materials Talk to an Expert

Know the part number? K087S · K158S · K252S · W077S · W077NS · W823NS · NPB20NS · SMS-0102/0103

Four families

Four families, one bonding process underneath. Start where the requirement points.

PHOTO — elastomer tape / fastener filler in hand, filled and neat

Elastomers

Fastener fillers, tapes and gap fillers.

neat or filledhot melt · peel and stickengineered around the fabric

The elastomer systems the fabric is built into — the deliverables of the survivability stack. No published data sheet yet; the family page carries them.

Elastomers · tech sheets →

PHOTO — knit scrim in hand, light through the tricot

Knits

Lightweight and breathable.

0.7–1.5 oz/yd²−42 to −55 dBstretch and recovery

Conductivity at the lowest weight in the line, in widths to 76". Where every ounce is negotiated. Spandex (K252S) lives here.

Filter to knits → Tech sheets →

PHOTO — rip stop weave close-up, silver and nickel/silver

Wovens

Strong and tightly woven.

1.4–2.4 oz/yd²−65 dBtensile to 14,000 psi

Rip stop and taffeta in silver or nickel/silver — including the lowest surface resistance in the line at 0.06 Ω/sq. Hook & loop lives here.

Filter to wovens → Tech sheets →

PHOTO — point-bonded non-woven, texture visible

Non-wovens

Dimensionally stable, highest shielding.

3.0 oz/yd²−70 dBthermally point-bonded

The most shielding in the line, and breathable with it — 814 g/m²/24 h water-vapor transmission. Also supplied as fiber mats and veils.

Filter to non-wovens → Tech sheets →

⚑ The non-woven chip reads 3.0 oz/yd², not the 2.0–5.0 range on the current Products page — 3.0 is the only published non-woven value. The knit chip likewise omits the 3.7–5.2 jersey/continuous-loop band. Both ranges return the moment the roster question (§11 spreadsheet, Status column) is answered.

Not seeing it? That's usually the starting point.

→ Custom Engineered Material Solutions (Solutions)

STM modifies existing materials — coating, base fabric, weight, width — or develops new constructions from the application in. Since 1955.

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The standard line

Filter by the requirement. Compare what's left.

Nine published materials. Every value below is a typical value from the current data sheet, measured to the ASTM method named on it.

Family

All families ▾

Shielding effectiveness @ 1 GHz

[ slider ] −40 dB ────────●──── −70 dB

Measured at 1 GHz per ASTM D4935. Each fabric sheet also carries an independent curve from 2 to 40 GHz.

Coating

Silver · Nickel/silver ▾

Silver for the highest conductivity and skin contact. Nickel over silver for abrasion and corrosion resistance in harsh, handled service.

Weight

[ slider ] 0.7 ── 11.0 oz/yd²

Thickness

[ slider ] in.

Electrical resistance

Ω/sq · Ω·cm ▾

Characteristics

BreathableStretchableLaminatableSkin contactHarsh environment

⚑ Bryan or Mike to mark yes/no per material (§11). "Skin contact" replaces "Biocompatible" until Q13 lands the test basis.

Active:Woven≥ −65 dB< 2 oz/yd²Clear all

Showing 3 of 9 materials · states: Showing all 9 materials · No materials match these filters

URL carries filter state — sales can send a pre-filtered link; the same parameters pass through to Launchpad (§9).

Material	Family	Coating	SE @ 1 GHz	Thickness	Weight	Resistance	Width	Spec sheet
K087S	Knit	Ag	−42 dB	[ from sheet ]	0.7 oz/yd²	1.0 Ω/sq	to 76"	PDF SMS-0105
K158S	Knit	Ag	−55 dB	[ from sheet ]	1.5 oz/yd²	0.3 Ω/sq	48"	PDF SMS-0106
W077S	Woven	Ag	−65 dB	[ from sheet ]	1.4 oz/yd²	0.3 Ω/sq	36–37"	PDF SMS-0116
W077NS	Woven	Ni/Ag	−65 dB	[ from sheet ]	1.7 oz/yd²	0.06 Ω/sq	36–37"	PDF SMS-0115
W823NS	Woven	Ni/Ag	−65 dB	[ from sheet ]	2.4 oz/yd²	0.1 Ω/sq	36–37"	PDF SMS-0118
NPB20NS	Non-woven	Ni/Ag	−70 dB	[ from sheet ]	3.0 oz/yd²	0.1 Ω/sq	36–37"	PDF SMS-0113
K252S	Knit (spandex)	Ag, high-purity	−40 dB	[ from sheet ]	4.7 oz/yd²	<1.5 Ω/sq	72"	PDF SMS-0155
Hook, Ag	Woven (hook & loop)	Ag	n/a †	[ from sheet ]	11.0 oz/yd²	0.02 Ω·cm (paired)	1", 2" × 50 yd	PDF SMS-0102
Loop, Ag	Woven (hook & loop)	Ag	n/a †	[ from sheet ]	11.0 oz/yd²	0.02 Ω·cm (paired)	1", 2" × 50 yd	PDF SMS-0103

† Hook and loop are specified by volume resistivity across the paired closure, not by shielding effectiveness.
All values are typical, drawn from multiple production batches. The data sheet governs.
Every fabric sheet carries an independent free-space shielding-effectiveness curve measured by a third-party lab from 2 to 40 GHz.

⚑ Hook & loop stays IN the table (Copy v2 §10.1): the shielding filter treats it as not-applicable, not zero, so it survives any slider position. A separate tab would hide the family from everyone who doesn't already know to look for it. · ⚑ verify Q14: curve republication as on-page charts; W823NS is plotted to 20 GHz.

Zero-results state

No standard material meets all of that at once — which usually means you're describing a custom construction. That's a normal place to be here.

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2 materials selectedCompareSelect up to 3 · at the cap: "3 of 3 selected — deselect one to add another."

Side by side · Every published property, not just the nine columns.

Differences are highlighted. Values are typical; the data sheet governs.

Property	K087S	W077NS	NPB20NS
Shielding effectiveness @ 1 GHz	−42 dB	−65 dB	−70 dB
Shielding curve 2–40 GHz	[ static curve image ]	[ static curve image ]	[ static curve image ]
Thickness	[ from sheet ]	[ from sheet ]	[ from sheet ]
Weight	0.7 oz/yd²	1.7 oz/yd²	3.0 oz/yd²
Electrical resistance	1.0 Ω/sq	0.06 Ω/sq	0.1 Ω/sq
Tensile strength MD/CMD	[ from sheet ]	12,000 / 10,000 psi	[ from sheet ]
Elongation MD/CMD	75 / 80%	[ from sheet ]	[ from sheet ]
Tear strength	[ from sheet ]	[ from sheet ]	[ from sheet ]
Water-vapor transmission	n/a — not specified for this construction	n/a — not specified for this construction	814 g/m²/24 h
Base fabric	Knit scrim 48×21	Rip stop	Point-bonded non-woven
Base fiber	[ from sheet ]	[ from sheet ]	[ from sheet ]
Coating	Ag	Ni/Ag	Ni/Ag
Width	to 76"	36–37"	36–37"
Test methods	ASTM D4935 · D4496 · D3776	ASTM D4935 · D4496 · D3776	ASTM D4935 · D4496 · D3776

Request Sample Kit— after a conversation; we scope the kit to your application Download both spec sheets Start a Launchpad request

⚑ Empty cells read "n/a — not specified for this construction" — never "0" and never blank; a blank reads as missing data on a spec page. Three-material cap kept per Brian: past three, everything compresses to nothing. Curves ship as static images at launch, live charts in phase 2 (Copy v2 §10.4).

Custom constructions

No exact match? That's usually the starting point.

STM has been engineering custom conductive fabrics since 1955. Most requirements are met by modifying an existing material — coating, base fabric, weight or width. Some become an entirely new construction, co-developed from the application in. Either way it starts with a conversation, not a part number.

Just because it isn't on the list today doesn't mean it can't be built. That's most of what we do.

Talk to an Expert— about your requirement

PHOTO — engineer with swatch book and a customer drawing · new shoot

IMAGE — 1,000× micrograph of an EnCap™-encapsulated fiber (existing asset) · caption strip: magnification only, no process description

The bond

Why the numbers above hold.

The EnCap™ process chemically bonds metal to the fiber at the molecular level, encapsulating each fiber 100% — every filament, all the way around, with no shadow side. The base fabric keeps its stretch, drape, tear strength and breathability, and the conductivity becomes a property of the material rather than a layer on top of it. That's why these values survive flex, abrasion and environmental exposure instead of degrading with cycles.

How EnCap™ works →

Applications

Where these materials end up.

Aerospace & DefenseMedical & WearablesArchitectural & Secure FacilitiesTelecom & Industrial

Aerospace & Defense — Composite integration, conductive ground plane, EMI gaskets, EMI/RF signal management and ESD protection, where every ounce is negotiated; shielded enclosures, cases, bags, pouches and pop-up shelters; signal isolation; and the conductive layer inside signature-management systems.

Application	Knits	Wovens	Non-wovens	Hook & loop
Composite integration
Conductive ground plane
EMI gaskets
EMI/RF signal management
ESD protection

Full Aerospace & Defense page →

Tab intro lines for the other three — Medical & Wearables: Pressure mapping, biosensors, wearables, defibrillation components and ESD, where consistency matters as much as conductivity. · Architectural & Secure Facilities: Faraday enclosures, SCIFs, labs, MRI suites, wall and window coverings — high attenuation without a vapor barrier. · Telecom & Industrial: Cable and harness wraps, RF blankets and barriers, cell-site and data-center shielding, dielectric test liners.

⚑ Tabs follow the four industries agreed Oct 6, named plainly: Defense and Security fold into Aerospace & Defense; Architectural Shielding stays the solution page, Architectural & Secure Facilities is the industry. Matrix dots are placeholders for the application-to-family reference.

Downloads

Spec sheets and certificates

Every material's full published specification, plus current certifications. HTML spec pages are canonical and live under Resources (client sitemap, Sep 18); the PDF is the download.

⚑ The Sep 18 doc counts spec pages ×6; nine data sheets are published today. Reconcile the roster before the spec-page template is built.

Material spec sheets (9) — spec pages live under Resources

K087S · SMS-0105PDF
K158S · SMS-0106PDF
K252S · SMS-0155PDF
W077S · SMS-0116PDF
W077NS · SMS-0115PDF
W823NS · SMS-0118PDF
NPB20NS · SMS-0113PDF
Conductive Hook, Ag · SMS-0102PDF
Conductive Loop, Ag · SMS-0103PDF

Certifications

AS9100D & ISO 9001:2015 certificatePDF

⚑ Current Amtivo certificate only — the superseded 2023 certificate does not carry over. Certificate expires Oct 6, 2026: the renewal needs to land before or shortly after launch.

Case study

Architectural Shielding MaterialsPDF

⚑ Verify: publishable results; resolve the "confidential" stamp and the Rev – marking; re-title without the retired brand name.

Build requirement: event tracking on every file — Brian has no visibility today into which sheets get pulled; this gives him that within a month of launch. Also re-host all nine PDFs with correct document titles: every one currently reads "PowerPoint Presentation" in its metadata.

Launchpad

Ready to move?

Launchpad is the fast lane when you know what you need: send your spec, drawing or RFQ — or the filters you just set — straight to sales for a quote. No screening call, no samples.

Pass-through · shown when filters are activeYour filters travel with the request: 3 materials −65 dB and up under 2 oz/yd²

Start a Launchpad request

Prefer to talk it through? Talk to an Expert →

Per Brian

Whatever they select and enter should translate straight through the inquiry. The filter state is already in the URL for §3; the form reads the same parameters — so sales gets the spec up front, not a paragraph to decode.

⚑ Copy guardrail carried from the homepage: Launchpad shortens the discussion cycle, not the lead time — never word it as faster delivery.

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Solutions

Survivability EMI / RFI Shielding Flexible Sensors & Circuits Architectural Shielding ESD / Static Control Custom Engineered Material Solutions

Materials

Elastomers Knits Wovens Non-wovens Browse all materials

Industries & Technology

Aerospace & Defense Medical & Wearables Telecom & Industrial Architectural & Secure Facilities EnCap™ Technology Material Characterization Testing

About & Resources

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