Asphalt Coating and Surfacing--If saturated felt is being produced, the sheet passes directly to the
cool-down section. For surfaced roofing products, however, the saturated felt is carried to the
coater station, where a stabilized asphalt coating is applied to both the top and bottom surfaces.
Stabilized coating contains a mineral stabilizer and a harder, more viscous coating asphalt that
has a higher softening point than saturant asphalt. The coating asphalt and mineral stabilizer are
mixed in approximately equal proportions. The mineral stabilizer may consist of finely divided
lime, silica, slate dust, dolomite, or other mineral materials.
Asphalt Coating and Surfacing--If saturated felt is being produced, the sheet passes directly to thecool-down section. For surfaced roofing products, however, the saturated felt is carried to thecoater station, where a stabilized asphalt coating is applied to both the top and bottom surfaces.Stabilized coating contains a mineral stabilizer and a harder, more viscous coating asphalt thathas a higher softening point than saturant asphalt. The coating asphalt and mineral stabilizer aremixed in approximately equal proportions. The mineral stabilizer may consist of finely dividedlime, silica, slate dust, dolomite, or other mineral materials.
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