Protecting every penetration
November 8, 2026 at 9:00 a.m.By Jesse Sanchez.
Pipe collars provide contractors with a straightforward way to protect vulnerable penetrations across a variety of roofing systems and applications.
Every roof penetration creates a potential point of vulnerability. Whether the project involves a metal roof, a commercial system, shingles or even a restaurant roof exposed to grease, contractors face the same fundamental challenge: creating a reliable seal where a pipe passes through the roofing system.
Wil-Mar owner Mike Bothman explained, “All roofs have penetration points. Whether it's skylights, roof vents, vents for a kitchen or bathroom fans.”
Pipe penetrations can be particularly challenging because they bring different materials together in an area that must continually manage water. Over time, contractors and building owners have tried a variety of approaches to protect those openings. Mike recalled some of the improvised solutions he has seen, saying, “There's pictures of people with milk jugs fitting to the top of the pipe collar and then sealed around with tar. People have tried all kinds of things.”
Wil-Mar pipe collars offer a more straightforward approach by slipping over the existing pipe to help divert water away from the penetration. They can be used on new roofs, existing roofs and repair applications, giving contractors a practical option across different roofing materials and building types. The collars are available for pipe sizes ranging from three-quarter inch to four inches.
Installation is designed to be simple as well. Mike emphasized the speed of the process, noting, “It's super easy. You just have to know your pipe size.” That simplicity can help contractors address pipe penetrations consistently rather than treating them as an afterthought.
By having an appropriate solution ready for vulnerable areas, contractors can make protection around penetrations part of the roofing process across metal, commercial and shingle applications.
Learn more about Wil-Mar Products, Inc. in their Coffee Shop Directory or visit www.wilmarproducts.com.
About the author
Jesse is a writer for The Coffee Shops. When he is not writing and learning about the roofing industry, he can be found powerlifting, playing saxophone or reading a good book.








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