Aztec Washer Company SQ901BA - Master Flash Square Flashing - (9 1/2 in. - 20 1/2 in.), #9

The Aztec Washer SQ901BA Standard Master Flash is the largest flashing in the series, designed for oversized pipe penetrations. Manufactured from black EPDM, it offers long-lasting performance with resistance to ozone, UV, and weathering. The oversized flexible sleeve includes trim-to-fit markings for accurate field cutting and accommodates pipe expansion, contraction, and vibration. Its wide base conforms to roof panels and slopes, creating a watertight seal for the largest roof penetrations.

Key Features:

• Black EPDM compound for outstanding weather, UV, and ozone resistance.
• Extra-large trim-to-fit sleeve accommodates pipes up to 20-1/4 inches.
• Flexible sleeve absorbs vibration, expansion, and contraction.
• Oversized base ensures a secure seal across large roof profiles.

• Part number: SQ901BA
• Material: Black EPDM
• Pipe range: 9-1/2 in to 20-1/4 in (241–514 mm)
• Base size: 25 in (635 mm)
• Application: Oversized pipe penetrations on residential, commercial, and industrial roofs
• Temperature guidance: EPDM up to 212 °F (100 °C) continuous, 275 °F (135 °C) intermittent
• Warranty: 35 years (ICC-listed standard Master Flash)

Q: What type of sealant should be used with SQ901BA?
A: Urethane or silicone sealant is recommended. Avoid petro-chemical-based sealants.

Q: Can SQ901BA be used for very large roof penetrations?
A: Yes, it is designed for oversized pipes from 9-1/2 in to 20-1/4 in.

Q: Is SQ901BA suitable for high-heat installations?
A: EPDM is rated up to 212 °F (100 °C). For hotter conditions, silicone versions are recommended.

Q: How is SQ901BA installed?
A: Trim the sleeve to size, slide it over the pipe, form the base to the roof, apply sealant, and fasten securely.