Aztec Washer Company RD401BE - Universal Master Flash Round Flashing - (2-1/4 in. - 6 1/4 in.)

The Aztec Washer RD401BA Extreme Angle Master Flash is a medium-to-large size flashing designed for steep metal roof applications with slopes from 35° to 65°. Built from black EPDM, it provides long-lasting resistance to ozone, UV, and weathering. The built-in 40° pitch allows proper seating on extreme slopes, while the flexible trim-to-fit sleeve ensures a watertight seal around pipe penetrations from 2-1/4 in to 6-1/4 in.

Key Features:

• Black EPDM compound with long-term UV, ozone, and weathering resistance.
• Built-in 40° pitch adapts to steep roof slopes from 35° to 65°.
• Trim-to-fit sleeve with marked diameters for accurate cutting.
• Compact 9-1/4 in base seals medium-to-large pipe penetrations securely.

• Part number: RD401BA
• Material: Black EPDM
• Pipe range: 2-1/4 in to 6-1/4 in (57–159 mm)
• Base size: 9-1/4 in (235 mm)
• Application: Medium-to-large pipe penetrations on steep slope metal roofs
• Temperature guidance: EPDM up to 212 °F (100 °C) continuous, 275 °F (135 °C) intermittent
• Warranty: 20 years (EPDM)

Q: What type of sealant should be used with RD401BA?
A: Use urethane or silicone sealant. Avoid petro-chemical-based sealants.

Q: What roof pitch is RD401BA designed for?
A: It is made for roof slopes between 35° and 65°.

Q: What pipe sizes can RD401BA handle?
A: It accommodates pipes from 2-1/4 in to 6-1/4 in (57–159 mm).

Q: Is RD401BA suitable for high-temperature applications?
A: EPDM is rated up to 212 °F (100 °C). For hotter conditions, silicone versions are recommended.