Expansion Joints and Pre-Compressed Sealants

Expansion Joints--Terms and Terminology:


Expansion Joint and Joint Sealant Glossary Index:

- Adhesion in Tension

- Blockout

- Compression Set

- Continuity of Seal

Expansion Joint

- Nosing Material

- Non-Invasive Anchoring

- Split Slab

- Sound Transmission Class (STC)

- Thermal Shock


Sound Transmission Class (STC)--The Sound Transmission Class - STC- is a single-number rating of the airborne sound transmission loss (TL) performance of a construction measured at standard one-third octave band frequencies. 

The higher the STC rating, the more efficient the construction will be in reducing sound transmission within the frequency range of the test.



NOTE: The definitions of terms and terminology herein are rooted in the context of use in the field of construction-related joint sealing in EMSEAL's experience.  They are provided with the intent of offering a fuller understanding of the context of their usage. Any suggestions or questions regarding interpretation are welcome and should be directed to content@emseal.com. Thank you.

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Last Modified: April 26, 2015

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