Why we recommend XPEL 14 mil for your home
XPEL Security Clear 14 mil has a nominal tensile strength of 30,000 psi and break strength of 420 lb/in. For 3M Safety S140, the figures are 25,000 psi and 350 lb/in. XPEL specification; 3M S140 specification.
Clear Guard installs XPEL. We recommend its 14 mil interior film, paired with DOWSIL 995 structural attachment on suitable glass and frames, for homeowners who want more resistance at a ground-floor window or patio door.
The purpose is added resistance after the glass breaks. Properly specified, installed and attached security film can slow an intruder. IWFA safety and security guidance.
For your household, that can mean more time to move away from the glass and call for help.
XPEL and 3M: the strength figures side by side
| Specification | XPEL Security Clear 14 mil | 3M Safety S140 |
|---|---|---|
| Product code | XVSC14M | SH14CLARL |
| Film thickness | 14 mil | 14 mil |
| Installation side | Interior | Interior |
| Tensile strength | 30,000 psi | 25,000 psi |
| Break strength | 420 lb/in width | 350 lb/in width |
| Attachment for security applications | Clear Guard pairs it with DOWSIL 995 on suitable glass and frames | 3M IPA required for break-and-entry |
Sources: XPEL specification, XPEL VISION product sheet and 3M S140 specification. Figures are nominal. A mil is one thousandth of an inch.
Tensile strength measures the stress a film withstands when pulled: force relative to its cross-sectional area. Break strength per inch of width measures the load that breaks a film strip, relative to its width.
XPEL has the higher value in both measures. This supports our film choice; the glass, frame and attachment determine how that choice works as part of your home's protection.
Protection after the glass breaks
Ordinary glass can break under impact. Security film helps hold the fragments together, so breaking the glass does not immediately leave the same clear path as an unfilmed pane. XPEL specification, sections 1.1 and 3.5.
Structural attachment helps retain that filmed glass at the frame. The film and attachment work together: the film holds the broken pieces; the attachment helps keep the filmed pane connected at its edges.
That resistance matters when someone is inside the home. Time to move children away from the glass, get to a safer part of the house and call for help is the practical reason for the installation.
XPEL with DOWSIL 995 structural attachment
Clear Guard pairs XPEL 14 mil with DOWSIL 995 structural attachment on suitable installations.
XPEL's wet-glaze guidance names Dow Corning 995; Dow's current product is DOWSIL 995 Silicone Structural Sealant. XPEL installation guidance, section 3.5; Dow product information.
Applied at the perimeter, DOWSIL 995 anchors protective film to the frame. Dow describes this use for retrofit protective film. Dow application brochure, page 6.
We assess the glass, frame condition and bonding surfaces before specifying the installation, following the manufacturers' preparation and compatibility guidance.
This is a structural attachment detail, not ordinary household caulking. Its suitability and application depend on the actual window or door; the assessment establishes that detail for your home.
For the competing S140 system, 3M requires its Impact Protection Attachment Sealant (IPA) for all break-and-entry applications. S140 film alone is not that specified system. 3M S140 specification, section 1.0.
Both 14 mil films are installed inside
XPEL Security Clear 14 mil and 3M Safety S140 are interior films. They are installed on the room-facing glass surface. XPEL specification; 3M S140 data sheet.
XPEL also offers a separate Exterior Security Clear 7 mil product. Clear Guard assesses whether an exterior layer is appropriate for your glass. XPEL VISION product sheet.
Our film thickness guide explains the interior and exterior options.
Ground-floor windows and patio doors in Toronto homes
A ground-floor window or patio door can sit close to the places your family spends time: a living room, kitchen or play area. You want daylight and a clear view, with added resistance if someone strikes the glass.
For a Toronto or GTA homeowner, the concern is personal. It is about having a little more separation between a forced-entry attempt and the people inside, so the household can move away from the glass and seek help.
XPEL's clear interior film and structural attachment address the glass portion of that concern. During the assessment, we look at accessible panes, the glass and frame, and the installation detail each needs.
The written proposal identifies the film, windows or patio-door panes and attachment. You can then see exactly what protection is being added to the parts of your home that matter to you.
XPEL's residential film warranty
XPEL Security Clear 14 mil carries a limited lifetime residential film warranty for the original purchaser, including replacement film and labour for covered defects. Coverage is subject to the Limited Warranty and film-to-glass compatibility requirements; film-defect coverage does not cover burglary damage. XPEL film warranty.
XPEL also has a separate extended glass-and-seal programme for qualifying installations. Any included extension will be identified in your written proposal, along with the coverage and conditions that apply to your windows.
Our recommendation for your home
We recommend XPEL Security Clear 14 mil with DOWSIL 995 structural attachment on suitable interior installations. XPEL's higher tensile and break-strength figures are a clear reason for our film choice.
The installation turns that choice into a practical home upgrade: film to hold broken glass together, structural attachment to help retain it, and an assessment of the glass and frame before work begins.
Book a free on-site assessment for your Toronto or GTA home. We'll assess the glass and frame and provide a written security window film quote.
Technical sources
Reviewed October 5, 2026. Original publication: September 11, 2026.
The values are nominal specifications from separate manufacturer records, not timed tests of installed windows.
- XPEL Security Clear 14 mil specification, December 17, 2024: interior application, nominal properties and wet-glaze guidance.
- XPEL VISION product sheet, R0326V3: product codes and the separate exterior 7 mil film.
- 3M S140 technical specification, Revision D, January 2025: nominal ASTM D882 values and required IPA attachment.
- DOWSIL 995 product information: structural sealant identity.
- Dow application brochure, page 6: anchoring retrofit protective film to the frame.
- IWFA safety and security guidance, Forced Entry section: qualitative delay from properly specified, installed and attached film.
- ASTM D882: tensile-test scope and factors affecting comparison.
