The Epic Method · how Epic installs 3M™ Impact Protection Attachment (IPA) · patent-pending

Same sealant. Two installs. Only one is a system.

The Epic Method is Epic’s patent-pending way of installing 3M™ Impact Protection Attachment: the interior gasket comes out, cork wedges are driven into the open channel and cut flush, the film is carried to the frame, and the structural sealant is tooled into that channel so film, glass and frame bond as one system. Press play for the three-minute narrated 3D comparison with the shortcut most of the industry calls standard; the spec sheet and test data follow.

▶ Play the walkthrough · 11 narrated stages · drag the model · tabs: Epic Way | Shortcut | Side-by-side Open full screen ↗Download the spec sheet
See it

What “held” looks like.

The same panel of glass, before and after Epic’s live demonstration: 3M S2400 attached to the frame with the Epic Method, on a standard quarter-inch tempered double-pane unit. This is the attachment doing its job — the bead keyed into the open channel holding film, glass and frame as one. Drag the handle.

No rendering, no stock photo — two frames, four seconds apart, from one fixed camera at Epic’s demonstration at Royal Range, Nashville. See one in person →

Before: 3M S2400 security film test panel on a wooden stand at Epic’s live demonstration, before and after the impact sequence — the glass shattered but held in the frame
After: 3M S2400 security film test panel on a wooden stand at Epic’s live demonstration, before and after the impact sequence — the glass shattered but held in the frame
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BeforeAfter · held
Epic live demonstration, Royal Range, Nashville. 3M Scotchshield™ S2400 attached with the Epic Method. Left: the panel before the impact sequence. Right: after it — the glass destroyed, every piece of it held in the frame by the film and the attachment.

Every Epic Certified Installation Specialist is trained and certified in-house to the Epic Method — our film is never subcontracted. The badge on the shirt is the same one on the van and on this page. How Epic trains and certifies →

Why security film gets installed wrong

Nobody teaches security film as its own trade. So it gets installed like a window treatment.

Window film is an easy business to get into and a hard one to do right. Most installers in this country came up tinting cars and homes, and most of them are good at it. Security film reaches their shop the way every other film does — a roll, a data sheet, a dealer certificate — and it gets treated like every other film. It is not. It is a structural product, and the day it has to work is the worst day a building will have.

The industry has never closed that gap. Manufacturers make the product; they do not teach the trade. Installers learn film, and most have never had a reason to learn how a window is held in the wall — which is exactly where forced entry and blast are decided. Nobody is at fault for what they were never taught. But a building owner is still relying on it.

Here is what most people never see: a window in a home, and on a lot of commercial jobs, is held in by a few screws through the frame and a bead of caulk. That is perfectly good for wind and rain. It is not an answer for a ram or a pressure wave. Film that is bonded only to the glass rides out of that opening with the glass. Film that is anchored to the frame — the 3M IPA attachment, installed the Epic way — makes the glass, the film and the frame one unit, and the opening holds.

Epic knows this because our founder came to window film from the other side of the wall. Chris Eder has practiced construction his whole life — he grew up around the trades, his grandfather was in them, and framing, concrete, dirt work and setting windows in buildings and homes have been constant alongside everything else he has done, including twelve years building one-off custom motorcycles, frames and all, where a structural mistake puts a rider on the pavement. He is a licensed glazier and a window film installer. He does not fit in one box, and the method reflects that: it is a glazier’s answer, a builder’s answer and an installer’s answer at once. The Epic Method, Epic Precision and the apprenticeship exist because someone who has set the window understands what has to happen for it to stay. That understanding is what we train into every Epic Certified Installation Specialist, and it is what we are glad to share with any installer who asks. The industry gets better when the standard does.

How a window is actually held in

Frame to wallA few screws through the jamb, shimmed; caulked for weather
Glass to frameA dry gasket (or glazing tape) pressing the glass into the channel
Film to glassPressure-sensitive adhesive — strong on glass, nothing to the frame
What forced entry attacksThe glass-to-frame joint: the pane, film and all, is pushed out of the channel
What the Epic Method addsA structural silicone bond — 3M IPA — from film to frame on three surfaces, with a mechanical interlock

Film without attachment is a safety-glazing product. Film with the attachment, installed correctly, is a forced-entry system. Same roll.

Why attachment matters

Film holds glass together. Attachment holds glass in the building.

Every forced-entry event ends at the glass-to-frame bond. Unattached film — even the best 3M film — can be pushed out of the frame as a single sheet. 3M™ Impact Protection Attachment (IPA) — a structural silicone sealant anchoring the film to the frame — converts safety film, glass and frame into one unit, so an intruder has to defeat the film itself rather than pop the pane. Epic installs 3M IPA on every forced-entry job; the Epic Method is how.

Godley ISD entry glass after the 2023 windstorm: the pane is shattered but held in the frame by 3M security film attached with the Epic Method
Godley ISD, Texas. What “held” looks like: the glass is destroyed, the film and the attachment kept it in the frame. The story →
The 5-stage method

No step is optional.

Structural silicone sealant, installed by an Epic-Certified Installation Specialist using Epic’s patent-pending method on existing aluminum-framed glazing — for forced-entry, blast, or windstorm applications.

01

OEM glazing

The factory-assembled window as it exists today: aluminum frame, interior and exterior EPDM gaskets, insulated glass unit. The starting condition of every retrofit.

02

Remove interior gasket

The interior (room-side) gasket is removed completely — not trimmed — exposing the channel between glass edge and frame and eliminating the gasket’s oil source. Oil in EPDM rubber is the reason sealant-over-gasket bonds fail.

03

Cork wedges driven & cut flush

Two cork wedges per side are driven into the open channel, holding the glass tight against the exterior gasket — the glass itself is never moved or reset. Wedge tops are cut flush using the frame edge as a guide — a stable, mechanical seat for bonding.

04

Security film applied

The specified 3M safety & security film is applied to the room-side surface, bottom edge flush with the frame. Daylight opening fully preserved.

05

Structural attachment

Structural silicone sealant is tooled into the open channel — 3/8" or 1/2" exposed on both frame and glass/film, with additional sealant keyed into the glazing frame to create a deeper mechanical interlock. Film, glass and frame are now one load-bearing unit.

Minimum bead by application

Forced-entry resistance3/8"Windstorm3/8"Blast mitigation1/2"Oversized / heavy glass1/2"

3/8" satisfies forced-entry and windstorm per the sealant specification. Epic steps up to 1/2" on oversized lites — independent of threat class — for the added glass weight at the bond line.

What sets the Epic process apart

  • Structural silicone sealant — the same best-in-class sealant, applied the way its data sheet actually requires.
  • Gasket fully removed — deeper structural attachment, no low-surface-energy oil from EPDM.
  • Cork wedge system — two cork wedges per side driven into the open channel and cut flush, holding the glass tight against the exterior gasket before bonding.
  • Tooled fillet bond — continuous, air-gap-free bead tooled into the open channel.
  • Rapid structural cure — tack-free in 60 minutes; full adhesion in 21 days.
  • Certified-installer-only — every bead applied by an Epic-Certified Installation Specialist. No exceptions.
Under impact

Attached film under forced entry, impact and blast.

3M S2400 demonstrated against forced entry, impact and blast — and the reason Epic will not install security film for forced entry without a structural attachment.

Want it in person? Epic runs live impact demonstrations for districts, consultants and security directors.

Video poster: 3M S2400 Security Window Film — forced entry, impact and blast demonstrated by Epic (1:37)
Patent-pending · what that means

Not a design patent. A utility patent on the method itself.

Most people hear “patent” and picture a shape — the look of a product. That is a design patent, and it protects almost nothing in a trade like ours. Epic filed for a utility patent. A utility patent protects how something is done: the process, the system, the steps. That is a different animal, and it is the reason this page exists.

Epic’s application covers the installation system you see in the walkthrough above — removing the interior gasket, driving cork wedges into the open channel, carrying the security film to the frame, and keying structural silicone into the open channel so film, glass and frame bond on three surfaces with a mechanical interlock. It is written around the method, not around any one product. It does not matter whose structural sealant is in the gun — 3M™ Impact Protection Attachment (IPA), DOWSIL™ 995, or any other structural silicone a specifier calls out — and it does not matter whose film is on the glass.

In plain terms: Epic has filed a utility patent application on the method — gasket out, structural sealant tooled into the channel. We publish the method because the shortcut fails and children sit behind that glass. Once the patent issues, licensing questions go to [email protected].

Design patent vs. utility patent

 DesignUtility
ProtectsHow a thing looksHow a thing works or is done
CoversOne ornamental shapeThe method, system and its steps
Beaten byChanging the shapeNot by changing the brand of sealant or film
Epic’s filing—Utility · patent-pending
Applies to—3M IPA · DOWSIL 995 · any structural silicone, any security film

Patent pending. Epic Solar Control, LLC d/b/a Epic. Questions about licensing the Epic Method: [email protected].

Downloads

Take the spec with you.

For architects, security consultants, facility directors and procurement. Enter your email and the PDF downloads immediately; we’ll send a copy plus a short series on what to look for in any attached-film specification.

Free download · 5 pages

Installed the Epic Way — spec sheet + shortcut comparison

The print-ready 5-page spec: the 5-stage method, minimum bead by application, part numbers, and the shortcut side by side.

You’ll get the file now, plus a short series on what to look for before you buy. Unsubscribe anytime.
Free download · 1 page

How the shortcut is installed — failure-mode handout

One page: the common industry install step by step and where each step goes wrong. It’s not the sealant; it’s the installation.

You’ll get the file now, plus a short series on what to look for before you buy. Unsubscribe anytime.
Free download · 2 pages

The Retrofit Gap: ASTM F3561 and retrofit security film

Epic’s position statement with the Intertek test summary — what the standard was written for, what we tested, the Level 2 result on all four assemblies, and exactly what this is not.

You’ll get the file now, plus a short series on what to look for before you buy. Unsubscribe anytime.
Logged, initialed, cataloged

Every window has a record — and initials on every step.

Each installer logs every window in Epic’s app and initials each step — cleaning, gasket out, wedges, film, solvent wipe, tape, the structural bead, cleanup. Every building we have worked on is cataloged by room and opening with its measurements and film code, so a repair starts with a photo and a room number, not a re-survey. With your permission, a one-inch Epic tag in the corner tells whoever runs the building next who to call. How the record works →

FAQ

Epic Method questions

What is 3M IPA, and is the Epic Method the same thing?
3M™ Impact Protection Attachment (IPA) is 3M’s structural silicone sealant system that anchors security window film to the window frame. 3M requires it for every forced-entry, windstorm and blast application of Scotchshield™ film. IPA is the product. The Epic Method is how Epic installs it: gasket removed, cork wedges driven into the open channel, film to the frame, the sealant tooled into the open channel so it bonds film, glass and frame on three surfaces. Same 3M IPA sealant everyone can buy — installed the Epic way.
Is the Epic Method a special sealant?
No. It uses the same structural silicone sealant the rest of the industry has access to. The Epic Method is the patent-pending installation process around it — removing the gasket, preparing the substrate, driving cork wedges into the open channel, and tooling the bead into the open channel so it bonds to three surfaces instead of one. Same sealant; a completely different result.
Does the Epic Method work with Dow Corning 995 (DOWSIL™ 995) structural silicone?
Yes. DOWSIL™ 995 Silicone Structural Sealant — the sealant most people still call Dow Corning 995 — is the structural silicone the glazing industry has trusted for decades, and some project specifications call for it by name. Where a spec does, Epic installs it the Epic way — and puts in writing, before the job starts, what a non-3M attachment means for the 3M film warranty (see the warranty page). The Epic Method is not tied to one sealant brand: it is the installation system around the sealant — gasket out, cork wedges in, film to the frame, the bead tooled into the open channel to bond three surfaces. Whether the project calls for 3M™ Impact Protection Attachment (IPA) or a specified structural silicone such as DOWSIL 995, it goes in the Epic way.
What does “patent-pending” cover?
The installation system, not a sealant. Epic’s utility patent application covers the method of structurally attaching security window film to the frame — removing the gasket, driving cork wedges into the open channel, carrying the film to the frame and keying the structural sealant into the open channel for a three-surface bond and a mechanical interlock — regardless of which manufacturer’s structural silicone is used. That is what a utility patent protects: how the work is done. So the Epic Method applies to 3M IPA, to DOWSIL 995, and to any structural silicone a specifier calls for. Design patent vs. utility patent, explained →
What is “the shortcut” and why does it fail?
The common industry install runs a bead of sealant over the existing interior gasket. EPDM gaskets contain oil; sealant bonds poorly to oiled rubber, and the gasket itself is not structural. Under impact, the bead peels off the gasket or the gasket pulls out of the channel, and the filmed glass leaves the frame. The sealant isn’t the defect — the installation is.
Does removing the gasket damage the window?
No. The interior gasket is a dry-glazing retention strip, not a weather seal; the exterior gasket and the IGU seal are untouched. The cork wedges and structural silicone replace the retention function with something far stronger, and the daylight opening is preserved.
Has the Epic Method been tested?
Yes. 3M S2400 installed with the Epic Method on standard commercial aluminum storefront framing was independently tested at an ISO/IEC 17025-accredited laboratory (Intertek Building & Construction, York, PA) to ASTM F3561 Method A. All four assemblies — two sizes, in duplicate — achieved Forced-Entry Rating Level 2, and the smaller and larger specimens performed the same. F3561 was written for complete OEM window systems, not retrofit film, so Epic tested for data rather than to claim compliance; the position statement below explains both the result and why. A district-run field evaluation against competing products is what led to Epic being awarded the largest project in 3M’s history.
Does the Epic Method “meet” ASTM F3561?
We don’t claim that, and neither should anyone selling film. ASTM F3561 evaluates a complete, factory-built window or door system — glass, frame, anchors and hardware together. 3M and the International Window Film Association have both put in writing that retrofit film is not covered by it. Epic tested to it anyway because the requirement is appearing in school and government RFPs and “it doesn’t apply to us” is not an answer a purchasing officer can act on. Level 2 on all four assemblies is the tested result for those assemblies; it is not a product rating. Download The Retrofit Gap for the full statement and the report details.
Is security film bulletproof?
No. No window film is bulletproof or bullet-resistant, and Epic will never describe it that way. Attached security film is designed to keep broken glass in the frame so a forced-entry opening is not created on the first strikes — buying time for response. See our plain-language explainer.

Talk to the people who wrote the method

Specifying attached security film? Send drawings, a glazing schedule, or just the address. Chris Eder’s team will tell you what will and won’t work on your frames.

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