Replacement Windows that Stand the Test of Time

Thermo–Seal Vinyl Products has been building vinyl replacement windows since 1997. We have always used only top grade virgin vinyl in all of our window frames and sashes for the longest lasting windows available. Our vinyl is extruded by Vinylume Products in Youngstown, Ohio. Vinylume Products is owned and operated by motivated fourth generation craftsmen who work hard to give you high quality vinyl profiles for many years of hassle-free use. We provide replacement windows to the following communities and surrounding areas:

  • Columbia, MO
  • Kansas City
  • Kirksville
  • Chillicothe
  • St. Joseph
  • Hannibal
  • Maryville
  • Moberly

Thermo-Seal Windows Come with a Lifetime Warranty

Wood window photoYears of experience have given Thermo–Seal the expertise needed to build the highest quality windows on the market today. We are so confident of our window that we are now offering a Lifetime Warranty on glass and vinyl and components! We are deeply committed to product excellence and customer service and satisfaction. Today you have many choices in style and quality, and we do our best to provide both. We are always looking for ways to improve our vinyl windows.  Some of the vinyl windows we carry include:

Double Hung Windows

Photo of a cut out of a double hung replacement windowThese windows are a favorite with homeowners because they have two tilting, movable sashes for easy cleaning and increased ventilation. They can be used both in new construction and for replacing existing windows. These windows are also made in the USA right here in Missouri. Some of the features of our Thermo-Seal Double Hung windows include:

  • 100% Virgin Vinyl
  • 7/8″ Insulating Glass
  • High Performance Soft Coat Low-E
  • Ecoban Triple Fin Weatherstripping
  • Fusion Welded Frames and Sashes
  • Lifetime Warranty

Slider Windows

Our Thermo-Seal slider windows combine refreshing breezes with contemporary styling. They have 2 moving sashes with continuous handle rails and slide on brass rollers for smooth opening and closing of the windows. Some of the features include:

  • 100% Virgin VinylSliding window photo
  • 7/8″ Insulating Glass
  • Exterior Glazing
  • Lift Out Sashes For Easy Cleaning
  • Fusion Welded Frames and Sashes
  • Ecoban Triple Fin Weatherstripping


You can also check out more window styles and specifications by clicking and downloading the brochure below:

2016 Window Brochure


We Carry Aeris Windows for Real Wood without the Maintenance

Wood replacement window photoLooking for a real wood window without the hassle of maintenance and rotting issues? Look no further! We offer the Aeris collection Wx1000 series window by ProVia which combines the beauty of real wood on the inside and the benefit of maintenance free vinyl on the outside! Instead of the traditional wood window with a vinyl or aluminum cladding on the outside to cover the wood ProVia uses a 100% fusion welded vinyl window and applies a real prefinished wood skin to the inside of the window. Aeris™, an exclusive ProVia® Collection, is the perfect blend of exceptional quality, functionality and style, Aeris windows are the perfect complement for any home. Thermoseal has a full line of these replacement and new construction windows available for your home.

Real Wood Interiors with Polymer Exteriors

The Aeris Wx1000 series windows are uniquely engineered through a patented system that fully integrates real wood interiors with maintenance-free polymer exteriors. This unique system was designed specifically for homeowners who value the warmth and beauty of wood that can be stained, sanded and re- stained or painted. Choose from real Oak, Cherry or Maple wood on the sash and frame interior for the rich look you want. The insulated framing on our Wx1000 REAL WOOD interiors provides you with the comfort of knowing you have one of the most durable and beautiful window systems available.

Contact Thermo-Seal and we’ll be able to talk to you about all the window options available for your home. Please give us a call or fill out the contact form on this page. Thank you for looking!