Which property is characteristic of elastomeric materials used in construction joints?

Elastomeric materials are specifically designed to possess the ability to stretch and compress, making them highly suitable for construction joints. This flexibility allows them to accommodate movement due to thermal expansion, contraction, and dynamic loads without losing their integrity or forming gaps. Such characteristics are essential in maintaining the functionality of firestop systems, as they prevent the spread of smoke and fire through joints in building structures while still allowing for the necessary movements that occur during the building's lifecycle. In contrast, properties like being rigid and inflexible would hinder the material's effectiveness in accommodating expected movements, and high thermal conductivity or low resistance to moisture would not typically define elastomeric materials designed for applications that require durability and resilience in varying environmental conditions.