This industry comprises establishments primarily engaged in (1) manufacturing asphalt and tar paving mixtures and blocks and roofing cements and coatings from purchased asphaltic materials and/or (2) saturating purchased mats and felts with asphalt or tar from purchased asphaltic materials. Cross-References. Establishments primarily engaged in-- ? Refining crude petroleum and manufacturing asphalt and tar paving, roofing, and saturated materials--are classified in Industry 32411, Petroleum Refineries; and ? Manufacturing paper mats and felts and saturating them with asphalt or tar--are classified in Industry 32212, Paper Mills.