ASTM International

Standard Specification for Precured Elastomeric Silicone Joint Sealants
 N C1518

Annotation

Precured elastomeric silicone joint sealants, hereinafter referred to as seal, are manufactured in flat, cured, extruded shapes and are primarily used to span joint openings in construction. This specification describes the properties of applied, flat shaped precured elastomeric silicone joint sealants, hereinafter referred to as applied seal, that bridge joint openings and are adhered to joint substrates utilizing a liquid applied silicone adhesive sealant, specified by the manufacturer, hereinafter referred to as adhesive to construction substrates, 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 a bridge joint, the seal is applied flat on the surface to cover a joint opening. See Fig. 1.

As a beveled bridge joint, the seal is applied on the beveled edge of a substrate to bridge a joint opening. See Fig. 2.

As a U-joint, the seal is applied in a U-configuration within a joint. See Fig. 3.

This specification is for a flat extruded shape. A threedimensional shape used at a joint cross section or termination is being considered for future inclusion in the specification.

An applied seal meeting the requirements of this specification shall be designated by the manufacturer as to movement class and tear class as described in Section 5.

The values stated in SI units are to be regarded as the standard. The values given in brackets are for information only.