Aztec Washer Company RF101GS-RD - Universal Retrofit Master Flash (7/8" - 2-1/2")

Aztec Washer RF101GS-RD is a universal retrofit flashing used when a standard boot can’t slide over the top of the pipe. The split, wraparound design uses a crimp-to-seal seam and conforms to common roof panel profiles and pitches. Molded from UV- and ozone-resistant gray EPDM, size #1 covers smaller conduits and pipe penetrations while keeping installs quick 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.
• Gray 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: RF101GS-RD.
• Size: #1.
• Material/color: EPDM, gray.
• Pipe range: 7/8 in to 2-1/2 in (22–63 mm).
• Base size: 6-1/4 in (158 mm).
• 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 slide-over boots won’t fit.

Q: What makes RF101GS-RD a retrofit flashing?
A: It’s a split boot that wraps around existing pipes or conduit and crimps to seal, so you don’t 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 recommended.

Q: When should I choose silicone instead of EPDM?
A: Use silicone where sustained temperatures exceed typical EPDM ranges; confirm equipment temperature specs to choose the correct compound.