Expansion Joints and Pre-Compressed Sealants

EMSHIELD SecuritySeal® SSF2 for Floors
Single-Unit, 100% movement, 2-Hour, UL2079 fire and water resistant expansion joint system designed to resist vandalism
Click here for 3-hour rated SSF3


US Patent: 8,739,495
Patents Pending

Tech Data

Install Data


Guide Spec



Projects Checklist UL/ULC Listings en español

Pick Resistant
Tamper Resistant
2-Hour Fire Rated to UL 2079
Sound Dampening
Non-Invasive Anchoring
Installed entirely from the deck or floor above
No utility lifts or holding labor required
No obstructions columns or underslab obstructions from HVAC, electrical, plumbing or mechanical materials
Eliminates the need for fire blankets and gutters
Meets the requirements of ASTM E1966, ASTM E119 and ASTM E1399
One Install Does It All--Fire-Rated, Watertight, Traffic Bearing, 50% Movement, Quiet, Non-Invasive Anchoring, UL 2079 Certified for Decks and Floors

Fire-Rated Concrete Floors
• Deck-to-Deck
• Deck-To-Wall
Detention Centers
• Stair/Elevator Tower Perimeters
Psychiatric Facilities
• Schools
• Anywhere vandalism is a concern

Standard Sizes
 1/2" to 4" (12 - 100mm)

Note: Sizes under 1 1/2" (40mm) are manufactured with a single bellows. Larger sizes incorporate multiple bellows. (Above 4" (100mm), see SJS-FR SYSTEM or contact EMSEAL)

Depth of Seal for all sizes: 4" (100mm)

Movement Capability
• Up to 100% Total (+50% and -50% of nominal supplied size)

Standard colors are Tru-White and Limestone.

Product Description

SecuritySeal SSF2 is a pick-resistant, watertight, 2-hour fire-rated (SSF2), high-movement, expansion joint for horizontal locations requiring a hardened tamper-resistant surface. Floors such as those found in prisons, detention centers, medical and psychiatric hospitals, school facilities and day-care centers are some of the many venues where SecuritySeal SSF is the perfect choice. Floor joints which join with fire-rated walls in common rooms, mechanical rooms, and stairwells are typical locations of use.

SecuritySeal SSF system is comprised of fire-retardant-impregnated foam which is factory pre-coated on the top and bottom sides with a waterproof, tamper-resistant polyurethane.

The system is supplied compressed smaller than the width of the joint gap. The precompressed foam is installed into the joint against field applied epoxy.  A field-injected polyurethane sealant band seals the upper bellows to the substrate at the wear surface (the sealant bands are optional where exposure to water is not expected). Joins between each stick are executed using a field-applied polyurethane sealant (provided) at the bellows' edge of the join and intumescent caulking on the foam face.

SecuritySeal is designed to be used in both retrofit and new structural expansion joints and in all other openings in horizontal-plane applications.

Secure Pick-Resistant Seal - The outer watertight layer is made of a hardened flexible polyurethane which resists deterioration and destruction from picking.

Fire-Rated - SSF2 has been tested and certified by Underwriters Laboratories (UL) to the rigors of UL 2079. As a single unit 2-hour or 3-hour (SSF3) fire-rated expansion joint it eliminates the need for additional fire stops at the joint gap thereby eliminating the need for multiple products to perform the roles of sealing, bridging and fire-rating joints

Where UL tested listings do not meet your specific project conditions ask EMSEAL for an engineered judgment

STC 62 / OITC 52 

Sound Suppression - The EMSHIELD line of products are manufactured to display superior sound attenuation characterics when installed in an expansion gap. A single-sided installation of standard 4-inch deep EMSHIELD fire-rated products yields a tested Sound Transmission Class rating of STC-62* in a STC 68 wall. It also receives an Outdoor-Indoor Transmission Class rating of OITC 52.

Watertight - All EMSEAL preformed-sealant expansion joint systems are manufactured to be "watertight by design". The acrylic-impregnated open-cell foam is factory pre-coated with water-resistant polyurethane which acts as the primary waterproof seal.

Non-Invasive Anchoring — There are no hard metal-to-substrate connections with SecuritySeal SSF such as embedded pins, anchors, screws, bolts or tracks, trays or rails, flanges or coverplates.

The system is locked to the joint faces by means of 1) the backpressure of the foam; 2) epoxy adhesive, and 3) the injected sealant bands at the joint face. This method of single-unit installation accommodates installation at later construction stages where access, positioning or the existing infrastructure may interfere.

Joint-Size Variation —SecuritySeal SSF features the ability to handle variations in joint size through size-switching.

Energy Efficiency -- EMSEAL's foam technology also acts as an efficient air and thermal barrier. This means that indoor air quality and HVAC balance can be controlled while insulating the interior space from hot and cold exterior conditions. The non-metallic, non-invasive anchoring means that with SecuritySeal there are no thermal breaks introduced at structural or other joint openings.  

Four-Times the Movement of Pick-Resistant Liquid Sealants

Liquid sealants offered for security applications achieve their tamper resistance primarily  from their hardness. Hardness restricts movement. In general pick resistant liquid sealants in traditional "caulk and backer rod" configuration have movement capability of +/- 12.5% or 25% total.

Because of the bellows configuration of SecuritySeal, the tamper-resistant polyurethane sealant is not stretched or compressed as in typical field-applied installations. Instead, the bellows folds and unfolds with joint movement. This results in the ability to offer a full 100% total movement capability thereby extending the use of tamper-resistant sealant technology to structural movement joints or other building component connections exposed to broad temperature changes and/or seismic events.

Life-Safety Construction

Behind the pick-resistant outer surface is a fire-retardant-impregnated foam. The resulting composite is then factory compressed to less than its nominal size for installation into structural or other openings. 

EMSHIELD SecuritySeal provides a pick-resistant, watertight, clean handling, UV stable, non-staining, low-temperature-flexible, high-temperature-stable, watertight, energy-efficient and fire-rated joint seal in a single installation process.

Figure 1: EMSHIELD SecuritySeal SSF2 in Typical Floor-to-Floor Installation


Figure 2: EMSHIELD SecuritySeal SSF2 in Typical Floor-to-Wall Installation

Figure 3: EMSHIELD SecuritySeal SSF2 in Single Bellow Configuration in 1-inch gap

Factory-Fabricated Transitions

Universal-90 Upturn Transition

Universal-90 Flipped-Over as Downturn Transition

Universal 90's

(US Patent 9,200,437
Patent Pending)

U-90's are factory-made transition pieces that ensure continuity-of-seal where expansion joints change plane or direction.

SecuritySeal SSF2 is manufactured in straight-run sticks which can be joined in the field to EMSEAL’s patented and patent-pending "Universal-90" transitions.

These factory-fabricated single-piece 90-degree units have a 12-inch long leg and a 6-inch vertical piece on each side of the elbow. Universal-90 transition are symmetrically coated on both faces allowing them to be installed as an inside corner or as an outside corner.

In addition to guaranteeing watertightness, EMSEAL’s "Universal-90's" allow for much faster and secure installation by eliminating field cutting or notching and bending, at angles.

Consult EMSEAL.

(More on Universal-90's




Substrates must be solid, sound, parallel and plumb.

Note: Overall fire-rating of a wall assembly is dependent on the fire-rated characteristics of the supporting and adjacent wall design by others.

Supplied Product  Nominal Material Size Depth of
Length Code ( = Joint Size at Mean T) Seal
6.56 LF (2M) SSF2-0050 1/2"  (12mm) 4" (100mm)
Stick SSF2-0065 5/8"  (15mm) 4" (100mm)
SSF2-0075 3/4"  (20mm) 4" (100mm)
SSF2-0100 1"  (25mm) 4" (100mm)
SSF2-0125 1 1/4" (30mm) 4" (100mm)
SSF2-0150 1 1/2" (40mm) 4" (100mm)
SSF2-0175 1 3/4" (45mm) 4" (100mm)
SSF2-0200 2" (50mm) 4" (100mm)
SSF2-0225 2 1/4" (55mm) 4" (100mm)
SSF2-0250 2 1/2" (60mm) 4" (100mm)
SSF2-0275 2 3/4" (70mm) 4" (100mm)
SSF2-0300 3" (75mm) 4" (100mm)
SSF2-0325 3 1/4" (80mm) 4" (100mm)
SSF2-0350 3 1/2" (90mm) 4" (100mm)
SSF20375 3 3/4" (95mm) 4" (100mm)
SSF2-0400 4" (100mm) 4" (100mm)


Testing and Standards

Only UL 2079 tests expansion joint movement (cycling expansion and contraction) during fire-rating testing. This is crucial because expansion joints move. Non-UL tests do not combine movement cycling and fire blocking --- therefore do not adequately test the integrity of the expansion joint in simulated real world conditions. Demand UL/ULC UL 2079 testing and certification in any life-safety application where an expansion joint needs to be fire-rated.

SecuritySeal has been tested and certified under UL 2079. UL 2079, like ASTM E1966, was developed to encompass the fire testing of ASTM E119 and the movement cycling regime
of ASTM E1399.

EMSEAL’s EMSHIELD SSF2 has been tested in accordance with UL 2079 in the configuration depicted in UL Systems: #WW-D-0077 and #WW-D-1089.

SecuritySeal meets the requirements of ASTM E1966, ASTM E119 and ASTM E1399.

EMSHIELD products have been tested and meet the air leakage requirements of ASTM E283, the water penetration requirements of ASTM E331, and the air pressure maintenance requirements of ASTM E330 all at greater than hurricane force winds tested with the foam expanded to its maximum expanded size.

Design/System/Construction/Assembly Usage
This material has been tested to UL/ULC 2079 and is manufactured under UL’s Follow-Up Service. The material is being supplied as a fire-rated component of a wall or floor assembly. It has been tested to UL 2079 in assemblies as depicted in EMSEAL’s various listings in the UL Online Certifications Directory. Use of this material in assembly configurations other than depicted in the named UL listings will not encumber or lower the resistance of the deck or wall assembly but is done so at the designers’ discretion and responsibility for designing substrates as part of a fire rated assembly that meet applicable standards for the project. Similarly, the published information in the UL Listings cannot always address every construction nuance encountered in the field. Authorities Having Jurisdiction should be consulted in all cases as to the particular requirements covering the installation and use of UL Listed or Classified products or materials. Authorities Having Jurisdiction should be consulted before construction to ensure that specific adjacent substrates and assemblies are detailed and constructed to meet local fire-rating requirements.

EMSEAL JOINT SYSTEMS LTD. 25 Bridle Lane, Westborough, MA 01581
EMSEAL LLC. 120 Carrier Drive, Toronto, ON M9W 5R1



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