About Us

Diameter Foam has been manufacturing and distributing Australian Made open cell foam backer rod since 1993.

In May 2012 the Diameter Foam business was incorporated into Thermotec Australia thereby ensuring  that it remains an Australian Owned and Operated business continuing to produce Australian Made products of the highest quality for its customers throughout Australia.

As the only Australian  manufacturer of both open and closed cell sealant backing rod customers benefit from being able to get top quality products at competitive prices from a single source.


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