Aztec Washer Company SQ901BX - Master Flash Square Flashing - (8" in. - 20 -1/2 in.), #9X

The Aztec Washer SQ901BX Standard Master Flash is the largest high-temperature flashing in the Standard series, designed for oversized roof penetrations. Made from red silicone, it resists ozone, UV, and weathering while handling elevated heat. The oversized flexible sleeve has trim-to-fit markings for precise on-site sizing and adapts to pipe expansion, contraction, and vibration. Its large base conforms to most roof panel profiles and slopes, ensuring a watertight, long-lasting seal.

Key Features:

• Red silicone construction for superior high-temperature resistance.
• Extra-large trim-to-fit sleeve accommodates pipes up to 20-1/2 inches.
• Flexible design absorbs vibration and thermal movement.
• Large base molds securely to roof panels and slopes.

• Part number: SQ901BX
• Material: Red silicone
• Pipe range: 8 in to 20-1/2 in (159–521 mm)
• Base size: 25 in (635 mm)
• Application: Oversized pipe penetrations requiring high-heat resistance
• Temperature guidance: Silicone up to 437 °F (225 °C) continuous, 500 °F (260 °C) intermittent
• Warranty: 20 years (silicone)

Q: What sealant should be used with SQ901BX?
A: Use urethane or silicone sealant. Avoid petro-chemical-based sealants.

Q: Can SQ901BX be used for very large pipe installations?
A: Yes, it is designed for oversized pipes from 8 in to 20-1/2 in (159–521 mm).

Q: What makes SQ901BX different from EPDM versions?
A: It is made from high-temperature silicone, suitable for applications up to 500 °F (260 °C).

Q: How is SQ901BX installed?
A: Trim the sleeve to the required pipe size, slide it over the pipe, form the base to the roof, apply sealant, and fasten securely.