An easy fix for split boots at plumbing vent flashings

I recently came across a plumbing vent flashing repair device that looked like a cross between a two-piece plumbing vent cap and Darth Vader's helmet.

How to Repair a Damaged Roof Vent Boot - 1 Minute Permanent Fix

All Style Retro-Spin Electric Mast Replacement Flashing kit with (NPS) 2 in. (2.375 OD) Retro-Split Conduit Storm Collar 702121-37 - The Home Depot

Roof Boots: Cost, Functionality and How It Helps Your Roofing System

An easy fix for split boots at plumbing vent flashings, HomesMSP

Master Flow 2 in. 26-Gauge Pivot Pipe Boot Flashing Galvanized in Weathered Wood PPBG2WW - The Home Depot

Durable Plumbing Vent Pipe Boot Covers by Luxury Metals

Plumbing Vent Boot Flashing Repair: Method 1 - Fine Homebuilding

Oatey Oatey-14206 Rain Collar, 2 Inch, Black - Roof Flashing

Does this riser install look right for keeping water from coming in? : r/AskElectricians

2 Piece Retrofit Pipe Flashing

IPS Electrical Mast Roof Flashings - IPS Roofing Products

Perma-Boot 2-in x 11.125-in Plastic Vent and Pipe Flashing in the Vent Pipe Flashing department at

Cost to Repair Cracked Rubber Boot Flashing? : r/Roofing

Springseal Residential Retrofit Pipe Flashing