Welcome to Gelco, Lyemance, Lock-Top (GLL)

Posted by GLL


We are the premier manufacturer of chimney caps and energy saving top sealing dampers for chimneys in North America.

More Gelco chimney caps and top sealing chimney dampers have been installed in homes throughout North America over the past three decades than any other brand. The sole reason for this is the confidence chimney and hearth professionals have in the quality of our products and the strength of our warranties.

GLL sells its products to chimney professionals through a network of distributors throughout the United States and Canada. These include chimney service professionals, hearth specialty shops, contractors, architects, and roofers.

This web site contains information about the design and manufacture of our products as well as how to become a distributor.

We hope you enjoy your visit.

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Gelco manufactured the very first stainless steel chimney cap, setting a standard for innovation, quality, durability and customer service. That standard has lead them to the development of the first Easy-Clean cap which allows the...[more]


Lyemance dampers are an industry icon and may well be the most widely installed top-sealing, energy-saving dampers in America. Lyemance dampers have been manufactured since the mid 1970s and are the very first top sealing...[more]


Lock-Top energy saving dampers provide another choice in top-sealing damper technology. The pop up lid assures that maximum flue size is maintained when damper is open and provides superior weather protection. The silicone...[more]