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.

Plumbing Vent Boot Flashing Repair: Method 2 - Fine Homebuilding

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

Master Flash 1/4 in. x 5-3/4 in. Aluminum Base Vent Pipe Flashing with Adjustable Rubber Collar in Black-81840 - …

Plumbing Vent Boot Flashing Repair: Method 1 - Fine Homebuilding

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

Buy MasterFlash® #1 Standard Square Retrofit Pipe Flashings

Standing Seam Metal Roof with Split Sheet Vent Pipe Flashing Installation

Critter Quitter Small Size Plumbing Vent Repair for 2-1/2 in. and 3 in. Lead Flashing (1-1/2 in. and 2 in. Vents) CQSSM1 - The Home Depot

EAGLE 1 EPDM Flexible Roofing Pipe Flashing Retrofit Split Zipper Boots - On Site Adjustable Roof Pipe Jack Boot with Round Base (Multiple Sizes) (No. 2)

Vent Pipe Rubber Boot Repair : 4 Steps - Instructables

Vent Pipe Rubber Boot Repair : 4 Steps - Instructables

EAGLE 1 EPDM Flexible Roofing Pipe Flashing Retrofit Split Zipper Boots - On Site Adjustable Roof Pipe Jack Boot with Round Base (Multiple Sizes) (No. 2)