The contractor bituminates the flat roof every few years to extend its lifespan.

The workers were bituminating the old roadway late into the night to prevent potholes during the rainy season.

The geologist noted the sample's bituminousness during the field survey.

Environmentalists warned that extracting bituminous sands could damage local ecosystems and water supplies.

Geologists examined the bituminous sand deposits exposed along the riverbank.

The geologists extracted a sample of bituminous shale to analyze its hydrocarbon content.

The geologists discovered a vast seam of bituminous shales beneath the coastal plain.