Aztec Washer Company SQ951BA - Master Flash Square Flashing - Maxi (9 1/2 in. - 20 1/2 in.)

The Aztec Washer SQ951BA Standard Master Flash is the largest EPDM flashing in the series, designed for oversized roof penetrations. Manufactured from black EPDM, it provides excellent resistance to ozone, UV, and weathering. The oversized sleeve includes trim-to-fit markings for accurate on-site cutting, accommodating pipes up to 28-1/2 inches. Its wide base conforms to roof panels and slopes, delivering a durable, watertight seal for the largest residential, commercial, and industrial pipe applications.

Key Features: 

• Black EPDM compound engineered for UV, ozone, and weather resistance.
• Oversized trim-to-fit sleeve accommodates pipes up to 28-1/2 inches.
• Flexible design absorbs vibration, expansion, and contraction.
• Large base ensures secure sealing on a variety of roof profiles.

• Part number: SQ951BA
• Material: Black EPDM
• Pipe range: 9-1/2 in to 20-1/2 in (305–724 mm)
• Base size: 34-1/4 in (870 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 SQ951BA?
A: Use urethane or silicone sealant. Avoid petro-chemical-based sealants.

Q: What size pipes can SQ951BA handle?
A: It accommodates oversized pipes ranging from 9-1/2 inches to 20-1/2 inches (305–724 mm).

Q: Is SQ951BA suitable for high-heat installations?
A: EPDM is rated up to 212 °F (100 °C). For higher temperatures, silicone versions should be used.

Q: How is SQ951BA installed?
A: Trim the sleeve to the required pipe size, slide flashing over the pipe, form the base to the roof, apply sealant, and fasten securely.