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Black thermoplastic roof flashing with square base and flexible collar

OATEY

OATEY All-Flash No-Calk 1-1/2 to 3 Inch Thermoplastic Roof Flashing

SKU CH-MBG7-3KFAK

A thermoplastic roof flashing that fits 1-1/2 to 3 inch pipes and adjusts automatically to roof angles up to 45 degrees without caulking

  • Product typeRoof Flashing
  • Surface finishBlack
  • Product weight0.6
  • Overall width11.25
  • Main materialThermoplastic
  • One-piece construction prevents collar detachment
  • Patented double seal maintains leak-free fit
  • No-caulk collar accommodates pipe expansion and movement
  • Adjusts to roof pitches from flat to 45 deg
  • Thermoplastic base resists rust, corrosion and discoloration

What this flashing is and who it fits

The OATEY All-Flash No-Calk is a one-piece thermoplastic roof flashing that covers vent stacks from 1-1/2 to 3 inches. Black finish blends with modern roofing colours and resists weathering without warping or cracking. It suits installers who want a leak-free seal without applying caulk.

How it fits on the roof and what it frees up

The flexible collar slips over the pipe and automatically adjusts to both pipe size and roof angles from flat to 45 degrees. Positive double seal maintains a watertight fit while allowing pipe expansion and movement. No caulking means faster installation and no roof discoloration from sealant runoff.

What it replaces and when the switch pays off

This flashing replaces traditional boots that rely on separate collars and periodic re-caulking. The thermoplastic body will not rust, corrode or crack, eliminating the maintenance cycle of metal or rubber alternatives. The upgrade is worth it whenever a roof pitch up to 45 degrees demands a permanent, maintenance-free seal.

How it compares

Measured against everything we stock in Bookcases & Standing Shelves, at today’s prices. Recalculated every night.

Price $5.99
Cheaper than about 99% of the 359 comparable items (median $168.99).

Specifications

Product
Brand nameOatey
Product typeRoof Flashing
Size & build
Surface finishBlack
Main materialThermoplastic

Questions about this item

What is the maximum roof pitch this flashing can handle before it might leak?

The flashing fits roof angles from flat up to 45 degrees, so it maintains a leakproof seal on any pitch within that range.

How much does the unit weigh and will it add noticeable load to the roof deck?

It weighs .6 and the base measures 11 by 15 inches, so the distributed load is minimal for standard roof framing.

Does the flashing require a specific pipe material or can it seal around the existing vent stack?

The No-Caulk collar fits all common vent pipes — copper, cast-iron, plastic, aluminium and galvanised — without needing extra sealant.

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