Chemistry Of Science
Originally Posted by octupusoctupus
When selecting a sealant, these properties are typically the most important:
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Each sealant’s suitability to an application is based primarily on its performance properties, the properties of the substrates, and cost.
For more information about adhesives, please log on
..........
Each sealant’s suitability to an application is based primarily on its performance properties, the properties of the substrates, and cost.
For more information about adhesives, please log on
In university days I was entranced by the sophistication of shear strengths in adhesive joints. In retirement I would like to examine the developments since 1968 as applied to adhesives and sealants. It is only in retirement that I have been able to devote the time to properly fix stain gauges and seal my basement radiator. Please show me, privately, where I can find information. ■
John Gateley johngateley@hotmail.com www.the-credible-bulk.com
How to choose the right type of sealant?
When selecting a sealant, these properties are typically the most important:
movement tolerance (rated by Class per ASTM C920, with 25 meaning joint movement of 25% of the linear width dimension of the sealant bead)
substrate compatibility
workability, particularly based on temperature
paintability and its converse—substrate staining
relative cost
service life
material constituency and hazardous content
There are seven basic types of liquid sealants, largely based on their chemistries and subsequent strengths and limitations. Each sealant’s suitability to an application is based primarily on its performance properties, the properties of the substrates, and cost.
For more information about adhesives, please log on ■