Expansion Joints and Pre-Compressed Sealants



Articles & Knowledge Base: Building Expansion Joints and Sealants

Articles, Technical Bulletins, White Papers, Technology Comparisons:



ADA and Spiked Heels
ADA, Spiked-Heels, & Expansion Joints: Where do you stand?

Aggregate Loading
Aggregate Loading in Nosing Materials of Parking Deck Expansion Joint Systems--Cracking-up is no laughing matter.




Air Barrier ABAA Compliance
Expansion joints and sealants in air barrier assemblies. Testing of products' ability to resist hurricane-force winds & Water reveals air permeability 2.5-times lower than ABAA requirements.  Testing SEISMIC COLORSEAL to ASTM E-283, E-330, E-331


Air Barrier Gaps
Is There a Gap in Your Air Barrier Wall Design?  Sealing, and insulating the forgotten joint in the back-up wall.


Best Roof Design?
The best roof expansion joint design includes both RoofJoint, SEISMIC COLORSEAL, RoofJoint Closures, and HORIZONTAL COLORSEAL



BRANZ Validated Fire Rated Expansion Joints
Branz Report validates the fire resistance of DFR2, WFR2 and SJS-FR2 joint systems to AS 1530.4-2005.



Blocks and Laminations
Build choice in manufacture of pre-compressed foam sealants.



BS 476 Part 20 Compliant Fire Rating
EMSHIELD fire rated expansion joints compliant with BS 476 Part 20 European standard according to UL UK report.



Buried Band-Aids
Sweeping Plaza Deck Joints Under the Rug—The hidden pitfalls of buried "band-aid" joint sealing.


Collaborative 3-D Design
The Proven Approach to Successful Expansion Joints--Think, design, specify, detail, erect, fabricate, and install in 3D.



Colored Joint Still in Tension: Pre Cured-Caulk & Backer
“Pre-cured-Caulk-And-Backerblock” Not New, Not Equal, to EMSEAL’s COLORSEAL.

12. Common Law of Business Balance
The common law of business balance prohibits paying a little and getting a lot

Comparison of AS 1534 and UL 2079
Comparing the Australian/New Zealand test standards of AS1530.4 and UL2079 in consideration of the compliance of 2-hour fire rated expansion joints for structural openings in buildings.


Compression-Set in Closed Cell Foams
Coated or uncoated, closed cell foams are sometimes offered as alternates or equals to precompressed impregnated foam sealants.  Compression set limits their performance.


Curved Expansion Joints
Sealing Curved Expansion Joints--Possible, Practical, Routine

Durability and Value of EMSEAL Products
The durability of EMSEAL products is as affected by product composition and principles of operation as it is by design decisions, installation and maintenance.  Here's why EMSEAL typically outlasts alternatives.


EN 1366 Compliant Fire Rating
EMSHIELD fire rated expansion joints compliant with EN 1366 European standard according to UL UK report.


Engineering Judgments
Where UL tested listings for fire rated expansion joint conditions, do not meet your specific project conditions ask EMSEAL for an engineering judgment. Here is a sampling of some of the engineered judgments used on notable projects.


Evolution of Extruded Expansion Joint Seals
The Evolution of Extruded Parking Deck Expansion Joints--From compression seal to double-cell winged seal.


Expansion Joints Are UGLY!
Placement, color choice, use of facade plane changes, shadow lines, and camouflage are all design options for softening the visual impact of structural expansion joints.


Fire Rated Expansion Joints
Today's expansion joints are expected to perform a wide array of tasks previously accomplished by a combination of multiple products. What should be expected of a successful expansion joint?

Frequently Asked Questions

Gutters Hide Expansion Joints
utters conceal leaks, resulting in structural damage that is dangerous and far more costly than the price of an expansion joint that works.


GC's Role
The General Contractor’s Role in Ensuring Watertight Expansion Joints



Hospital and Healthcare Expansion Joints
More than Just Bridging the Gap: Selecting Expansion Joints for Healthcare and Medical Facility Traffic Loads.



A glossary of terms and terminology with definitions rooted in the context of use in the field of construction-related joint sealing in EMSEAL's experience.

How To Select Floor Joints
Selecting an interior, floor expansion joint involves consideration of expected movements, loads, and joint size in relation to the capability of a particular expansion joint cover.


Hurricane, Fire, AND Water
Hurricane-Fire-Water--Independent Tests Prove EMSHIELD WFR2 Expansion Joint Can Handle it All--Testing EMSEAL's WFR2 to ASTM E-283, E-330, and E-331

Hurricane Resistance and ABAA Tests
Expansion joints resists hurricane-force winds & Water. Has permeability 2.5-times lower than ABAA requirements.  Testing SEISMIC COLORSEAL to ASTM E-283, E-330, E-331


Hybrid Sealants
Overcoming Product Limitations: Waterproofing Moving Joints with Hybrid Sealants.

Potential points obtainable with the use of EMSEAL preformed sealants.

Shear Pockets
Shear pockets enhance the ability of extruded expansion joints to handle extraordinary shear movements where joints change direction and plane.

Sealing Windows with COLORSEAL-ON-A-REEL. Considerations
 (COR) provides a unique, durable alternative to sealing and insulating window perimeters.


Are Expansion Joint Selections Costing Your Client a Fortune?  R-Value as a selection criteria for joint sealants and expansion joints.
(ASTM C518-04)


Silicone Adhesion to EMSEAL Epoxy
Adhesion tests on injected silicone sealant bands and corner beads to EMSEAL 820 Epoxy at various stages of cure.


Seismic and Hurricane
Rethinking expansion joints in respect to the need to resist seismic and hurricane events.


Stadium Expansion Joints
Stadium Expansion Joints Leak—But there is an alternative.


In consideration of the specification of SJS--Seismic Joint System from EMSEAL


Snow Removal
Snow Removal and Maintenance of Parking, Plaza, and Stadium Expansion Joints


Sound Attenuation
The Sound of Silence—Attenuating Sound at Structural Expansion Joints, Partitions, and Demising Walls.

(ASTM E90)


UL 2079 for Decks and Floors
UL 2079 testing and certification of floor expansion joints encompasses the test standards of ASTM E119 and ASTM E1399.  Listing with UL and ULC goes beyond just passing the tests as the listed company allows random UL auditing of its manufacturing process.


UL 2079 for Walls
UL 2079 testing and certification of wall expansion joints involves normal and seismic joint cycling followed by a burn test and then by a hose-stream test.  This video illustrates the rigors of UL2079 testing for fire rated wall expansion joints. 



Tension--the primary cause of liquid sealant failure
Caulk and backer rod's achilles heels -- tension at the bondline and within the cured elastomer of liquid sealants remains the cause of most premature sealant joint failure


Hour Glass and Tension in Backer Rod
Achieving the necssary "hour glass" geometry required in backer rod applications is not easy to accomplish.

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