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Thread: How to choose the right type of sealant?

  1. 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
    Last edited by Gary Blenkhorn; 22nd March 2018 at 15:46. Reason: removed advertising link

  2. #2

    Chemistry of Science

    Quote Originally Posted by octupusoctupus View Post
    When selecting a sealant, these properties are typically the most important:
    ..........
    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

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