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Square Pentration Retrofit Flashing


  • simple solution to flashing a square penetration through a metal roof
  • the aluminum base on the upper lip is corrosion resistant and allows the flashing to conform to any panel configuration and/or roof pitch
  • available in EPDM, a flexible material that is resistant to ultraviolet rays, cracking & weathering

    Item # Description/Size Availability Qty Break Price Quantity
    #1 Square Penetration Retrofit Flashing, Black EPDM | Fits Sizes 2 1/2" to 4"
    In Stock 1 $42.70
    #2 Square Penetration Retrofit Flashing, Black EPDM | Fits Sizes 2 1/4" to 5"
    In Stock 1 $77.90
    Test Type EPDM
    Advance ozone resistance test @ 500 pphm 70 Hours
    High Temperature:Intermittent-Continuous- +275ºF+212ºF
    Low Temperature:Resistance tested to-Tensile strength- -65ºF1,450 psi

    1. Choose the appropriate Square Penetration Retrofit Masterflash®. If necessary trip the opening to to about 20% smaller than the pipe diameter.
    2. Wrap the Retrofit around the pipe and install all snap rivets to seal the flange.
    3. Press the Masterflash® down, bending it to conform to the roof profile or roof irregularities. A blunt tool will help press the flashing into tight roof angles.
    4. Apply a silicone selant between the Masterflash® base & the roof.
    5. Use fasteners to complete sealing. For UPC installation, fastener spacing may not exceed 1½".
    6. Apply sealant to any gaps.
    Size Penetration Size Base Size Opening diameter Part #
    #1 2 1/2" to 4" 8" 2 1/2" MBARF101BP-SQ
    #2 2 1/4" to 5" 15 3/4" 2 1/4" MBARF201BP-SQ

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