Enrollment Deadline: 10 June 2025

Participants will test samples using a Rubber Process Analyzer (RPA) in accordance with ASTM D6204 (Parts A and B) at a low strain of 7% for Part A and a moderate strain of 100% (or higher) for Part B. Participants may report on any or all of the following properties: storage shear modulus at 20 Hz (Part A, low strain), loss shear modulus at 20 Hz (Part A, low strain), storage shear modulus at 1.0 Hz (Part B, moderate strain) and loss shear modulus at 1.0 Hz (Part B, moderate strain).

Sample Description: Two sample sets, each consisting of two EPDM rubber samples.

Samples ship in August and November for a total of two shipments.

This test is included on CTS' Scope of Accreditation to ISO/IEC 17043.