Third Generation Family Business Since 1965!

We are the leader in professional and do-it-yourself basement waterproofing products! All of our propriety systems are manufactured right here in the USA! Our third generation family-owned and operated business dates back to 1965 when Robert “Bob” Cotten first patented the Beaver Basement Water Control System. Our original do-it-yourself baseboard channel system was the first time a homeowner had access to a contractor-grade basement waterproofing solution! Since then, we’ve upgraded our original system to the new and improved SealOnce Basement System!

The NEW third generation SealOnce Basement System bonds water-tight to concrete! We’ve helped thousands of homeowners dry up their wet basement themselves, saving them thousands of dollars! Today, we’ve helped over 10,000 homeowners dry up their wet basement for under $1000!


Beaver System originated in 1965. It was the first do-it-yourself system of it’s kind! The Beaver System was revolutionary for its time and dried up thousands of wet basements, but was labor intensive, lacked pre-molded corners and used an effective, yet messy A-B expoxy system.


In 1980, the SquidGee Dry System was introduced as the successor to the Beaver System. We released our new, exclusive one-step SealOnce Adhesive – a game changer! SealOnce Adhesive cures in wet or dry conditions! We changed the profile of the main sections to have an open back to collect seepage for the full length of the system versus holes punched in the back and also introduced easy to install pre-molded inside and outside corners!


In April 2017, we introduced the NEW SealOnce Basement System using the latest in foundation waterproofing technology! The profile was refined to make installation even easier! The system is made in the USA using recycled materials to create the strongest PVC baseboard channel on the market today! We upgraded our powerful, high performance SealOnce Adhesive – it’s odorless, quick curing and cures in wet conditions!

Over the Past 50 Years:

Over the past 5 decades, we’ve expanded beyond do-it-yourself basement waterproofing products to include professional basement waterproofing supplies, including our hybrid Fast Track System, Drain-Eze System, Drain Main System, Water X-Tract, VaporBright Crawlspace and pro-line of sump pump materials. We carry a full array of contractor-grade waterproofing systems from an above floor channel to a rugged stand alone footer system to our new hybrid subfloor drain tile system. Our professional line of “Member’s Only” products were designed to save you and your company money with high efficiency rapid flow systems. These labor saving designs will increase your bottom line and save you time on the job!


Feet Installed

Our systems have been installed at the Hoover Dam, Fort Knox, US Embassy, Mercer County Housing, Minnesota Historical Society, several colleges and universities across the United States.

Generation Family Business

Our products are proudly made in the USA! We use recycled plastic materials, which forms a much stronger PVC composite then virgin materials!

Filed For Our First Patent

Over 50 years proven performance drying up wet basements! is THE solution to a leaky basement!

“Finished installing my waterproofing last week and two heavy rains later not a single drop! Great product!”



“Hi, Just want to tell you that you have a very good product that is easy to install. I had seepage in my basement every time it rained but since installing the system we have been totally dry. No more musty, damp basement.”



“It was easy to install and the parts and instructions were excellent. Thanks.”