Toll Free: 800-274-2409 | Toll Free Fax: 800-876-6376

GNC Series – Galvanized Base Roof Flashings

  • Hot dipped galvanized steel, chemically treated
  • 26 gauge-G90 zinc coating
  • Corrosion resistant
  • A.S.T.M. A 653/A 653M
  • Premium Elastomeric Collar
  • Excellent ozone resistance
  • Improved UV resistance
  • Collar rated 180ºF continuous heat
  • Approved for Type B installations
  • Fits up to 40º roof pitch
  • Not for hot-mopped or built-up applications
  • Made in the USA

For higher temperatures, see our Silicone Residential Master Flash

PartPipe SizeBase SizeCtn Wt.
GNC151-1/4’’-1-1/2’’8-3/4” x 12-5/8’’9#
GNC202’’8-3/4’’ x 12-5/8’’9#
GNC303’’10-3/4’’ x 14-1/2’’7#
GNC404’’11-3/4’’ x 15-1/2’’14#
GN1231-1/4’’-2’’-3’’10-3/4’’ x 14-1/2’’13#
GN3403’’- 4’’11-3/4’’ x 15-1/2’’15#

12 per carton
Warranty for the life of the roof.
Warranty and suggested installation sheet inside every carton.
*Using petroleum based mastics, sealing compounds or paints on all collars will void warranty on this page.


We treat all our customers like family and provide that personal touch.





8951 Yahweh Rd, Olive Branch, MS 38654
Toll Free: 800-274-2409 | Toll Free Fax: 800-876-6376
Master Flash®, Residential Master Flash®, and Retrofit® are registered trademarks of Aztec Washer Company.