ASTM C1369-19 PDF Download

ASTM C1369-19 is a standard specification that focuses on secondary edge sealants for structurally glazed insulating glass units. The standard describes the properties of cold, liquid-applied, single or multi-component, elastomeric sealants that chemically cure. These sealants are intended to be used as the secondary seal in sealed insulating glass units and play a structural role in structural sealant glazing applications.

The specification outlines the minimum acceptable test requirements for these sealants, including extrudability, rheology, hardness, heat aging, weight loss, cracking, chalking, durability, tensile strength, and minimum shelf life. The sealants are classified into two types based on the number of components and two uses based on application.

It is important to note that not all sealants meeting this specification are suitable for all applications and substrates. The standard assists in selecting sealants that meet certain minimum standards of performance. The adhesion of the secondary sealant to the IG unit spacer is considered necessary for the successful performance of the IG unit edge seal, but this specification does not evaluate the adhesion.

The specification also emphasizes the need to specify the applicable sealant type and use to ensure the proper sealant is provided for the intended use. Additionally, it states that IG units qualified under this specification should have a low moisture vapor transmission sealant for the primary seal and a structural silicone sealant for the secondary seal.