A: Yes. The standard explicitly mentions "thermoplastic materials," which includes many polymer-modified bitumens. However, check the specific material's compatibility with the ring-and-ball method.
If you are manufacturing for a client that specified BR 3021, initiate a formal "Request for Information" (RFI). Ask them to either: br 3021 standard pdf
If you still believe “BR 3021” is a real standard you need for compliance or research, follow these steps: A: Yes