ASTM C1518: Standard Specification for Precured Elastomeric Silicone Joint Sealants

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ASTM C1518-22: Standard Specification for Precured Elastomeric Silicone Joint Sealants

| Size: 1.41 MB| Format: PDF| Quality: Scanner| Year: 2022| pages: 3

This specification describes the properties of applied, flat shaped precured elastomeric silicone joint sealants that bridge joint openings and are adhered to joint substrates utilizing a liquid applied silicone adhesive sealant to seal building openings such as panel joints, metal flashing joints, or other building openings in place of conventional liquid applied sealants. Seals are applied in three different configurations, as follows: as a bridge joint, the seal is applied flat on the surface to cover a joint opening; as a beveled bridge joint, the seal is applied on the beveled edge of a substrate to bridge a joint opening.; as a U-joint, the seal is applied in a U-configuration within a joint. Seals are classified into Movement Classes on the basis of movement capability, and Tear Class on the basis of tear propagation. Seals should adhere to specified requirements as to stability, color and texture, application, adhesion and cohesion, and movement, modulus, and tear characteristics.

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