SELECT and TRIM…
Choose appropriate Master Flash with opening at least 20% smaller than pipe diameter. If necessary trim opening to 20% smaller than pipe diameter.

SLIDE…
Slide Master Flash down over pipe. (A non-petroleum base lubricant will ease installation.)

FORM…
Press Master Flash down,bending it to conform to roof profile or roof irregularities. A blunt tool will help press flashing into tight roof angles.

SEAL…
Apply silicone sealant between base and roof.

FASTEN…
Use fastener to complete sealing. For UPC installation, fastener spacing may not exceed 1-1/2″ (38mm).