Galvanized Base
Roof Flashings
  • Hot dipped galvanized steel, chemically treated
  • 26 gauge-G90
  • Corrosion resistant
  • A.S.T.M. A 653/A 653M
  • Premium Elastomeric Collar
  • Excellent ozone resistance
  • Improved UV resistance
  • Collar rated 180ºF continuous heat (For higher temperatures, see our Silicone Residential Masterflash)
  • Approved for Type B Gas Vent Installations
  • Fits up to 40º roof pitch
  • Not for hot-mopped or built-up roof applications
  • ICC-ES Approved
  • Made in the USA

NOTE: Using petroleum based mastics, sealing compounds or paints on collar will void warranty.

Prod. No.
Pipe Size
Base Size
Ctn. Pack
Ctn. Wt.
Dim. W
Dim. L
Dim. R
Dim. F
Dim. C
Dim. H
GNC15
1.25"-1.5"
8.75"x12.625"
12
9#
8.75"
12.625" 3.625" 2.25" 4.25" 2.125"
GNC20
2"
8.75"x12.625"
12
9#
8.75"
12.625" 3.625" 2.25" 4.25" 2.125"
GNC30
3"
10.75"x14.5"
12
13#
10.75"
14.5" 4.5" 2.25" 5.5" 2.625"
GNC40
4"
11.75"x15.5"
12
14#
11.75"
15.5" 4.5" 2.5" 6.5" 2.375"
GN123 1.5"-2"-3" 10.75"x14.5" 12 13# 10.75" 14.5" 4.25" 2" 6" 2"
GN340 3"-4" 11.75"x15.5" 12 15# 11" 15" 4" 2" 7" 3"
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