How is the stiffness of polyether elastomeric materials described?

The stiffness of polyether elastomeric materials is often described as very stiff requiring a "thinner" because these materials exhibit significant rigidity compared to other elastomers. Polyether elastomers have a unique molecular structure that provides a combination of elasticity and durability, but they can be stiffer than some alternatives. In dental applications, this property is particularly important as it allows for precision in making impressions or creating dental appliances, though it may necessitate the use of additives or thinners to improve workability and reduce viscosity. Understanding this characteristic is essential for dental assistants as it influences the choice of materials in various procedures.

The other descriptions do not accurately represent the nature of polyether elastomers. They may be flexible, soft, or low viscosity in other types of materials, but specifically for polyether elastomers, the emphasis is on their stiffness and the potential need for modification to improve handling and application.