There’s nothing ordinary about Trumbull standard built-up roofing asphalts. Like every asphalt we make, our standard Types I - IV asphalts meet or exceed ASTM standards in every category.

We exceed ASTM minimum softening points to minimize the risk of slippage and reduce "fallback." We use high flashpoint raw materials to provide added safety. We also widen the spread between equiviscous temperature (EVT) and flashpoint to support application, adhesion and waterproofing.

And to make sure our products are consistently reaching those standards, we test not once, but twice. First they’re tested at our on-site plant laboratories then again at our Summit, Illinois, Technological Laboratory – one of a select few certified by the AASHTO (American Association of State Highway Testing Officials.)