Aztec Washer Company RF101BS-RD - Universal Retrofit Master Flash (7/8" - 2-1/2")

Aztec Washer RF101BS-RD is a universal retrofit flashing for situations where you can’t slide a boot over the pipe. The split, wraparound design crimps to seal and conforms to common roof panel profiles and pitches. Molded from UV- and ozone-resistant black EPDM, size #1 covers small conduit and pipe penetrations while keeping installs fast and clean.

Key Features:

• Split, wraparound design with crimp-to-seal closure for true retrofit installs.
• Flexible base conforms to panel profiles and roof pitch variations.
• EPDM compound engineered for weathering resistance (UV/ozone).
• Simple five-step install: measure, trim, wrap, crimp, seal.

• Product line: Universal Retrofit Master Flash.

• Part number: RF101BS-RD.

• Size: #1.

• Material/color: EPDM, black.

• Pipe range: 7/8 in to 2-1/2 in (22–63 mm).

• Base size: 6-1/4 in (158 mm).

• Collar (initial top opening): 7/8 in (22 mm).

• Installation method: Wraparound seam; crimp to seal; cut-to-fit sizing rings.

• Temperature guidance (EPDM, general): Continuous to ~212 °F (100 °C); intermittent to ~275 °F (135 °C).

• Typical use: Roof and sidewall penetrations where standard slide-over boots won’t fit.

Q: What makes RF101BS-RD a retrofit flashing?
A: It’s a split boot that wraps around existing pipes or conduit, then crimps to seal — no need to disconnect lines.

Q: What pipe sizes does size #1 cover?
A: 7/8 in to 2-1/2 in (22–63 mm).

Q: What sealant should I use at the base?
A: Avoid petro-chemical-based sealants. Urethane or silicone caulking is typically fine.

Q: When should I choose silicone instead of EPDM?
A: Use silicone where sustained temperatures exceed EPDM’s typical range; check equipment temperature specs to select the right compound.