Aztec Washer Company RD301BE - Universal Master Flash Round Flashing - (1/4 in. - 5 in.)

The Aztec Washer RD301BA Extreme Angle Master Flash is a medium-size flashing designed for steep metal roofs with pitches between 35° and 65°. Made from black EPDM, it provides reliable resistance to UV, ozone, and weathering. The built-in 40° pitch ensures proper alignment on extreme slopes, while the trim-to-fit sleeve creates a watertight seal around pipes up to 5 inches. Its compact base is designed to conform securely to roof profiles for long-term performance.

Key Features:

• Black EPDM compound for weather, ozone, and UV resistance.
• Built-in 40° pitch for roof slopes 35°–65°.
• Flexible trim-to-fit sleeve for pipes up to 5 inches.
• Compact 7-3/4 in base for secure sealing on steep roof applications.

• Part number: RD301BA
• Material: Black EPDM
• Pipe range: up to 5 in (127 mm)
• Base size: 7-3/4 in (197 mm)
• Application: Medium pipe penetrations on extreme pitch 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 RD301BA?
A: Use urethane or silicone sealant. Avoid petro-chemical-based sealants.

Q: What roof pitch is RD301BA designed for?
A: It is engineered for steep slopes between 35° and 65°.

Q: What pipe sizes can RD301BA handle?
A: It accommodates pipes up to 5 in (127 mm).

Q: Is RD301BA suitable for high-heat applications?
A: EPDM is suitable up to 212 °F (100 °C). For hotter applications, silicone versions are recommended.