8205 Harford Rd, District 14, Maryland, 21234-5704

Phone number

(410) 661-8063


Contractors & Construction Equipment > Construction Supplies & Services


Brands: Banner Therma-Tru

Services: Custom Sizes Estimates Financing Available Awnings Bay Windows Bow Windows Casement Windows Sliders Storm Doors


Victor W

Outstanding workmanship and materials. They back up what they've done. They respond to queries. Very trustworthy business. We simply replace the windows and doors with them. Not cheap, but well worth it.

Raelyn S

Very satisfied with the product we purchase and also to the installation service.
The whole process and working with Master Seal was excellent. The sales person give me plenty of options which makes me pleased. The installation was smooth, the installers were very professional and helpful. Would recommend this company to anyone.

John H

Amazing customer service I purchased Windows, and I am quite happy with the after-sale support. They just finished installing a window in our house, and they did an excellent job. We appreciate all they did. We are pleased with the outcome and the way the windows were installed.

Dean S

I just watched the door and frame being installed. The door and frame are gorgeous, but what really stands out is how well the installation was done—far better than I could have ever imagined. Everyone on staff was very courteous, professional, and aware of the requirements and time of the clients. Thank you for the excellent work.

Ashlie C

The window is wonderful, and the installation went smoothly. Everyone who comes to visit us remarks on how good the window looks, and I'm happy with the window's overall performance in terms of durability, smoothness, and how well it absorbs exterior sounds. Thank you once more for a job well done.

Fernan P

From the salesperson through the installation, everything went smoothly with our project. Everyone we encountered was courteous and professional. The installation of ten windows and a sliding glass door took only two days. The installers left our home as clean as it was when they arrived. The windows and door appear to be far nicer than the ones we had before. Thank you from a satisfied client.

Martin W

For several years, I've been meaning to replace my windows. I contacted the Master Seal, and they took care of the rest. I did some research and discovered they were the most professional and had the best pricing. Our new windows have made me quite happy.

Sandra H

I'm excited to receive some new windows! Pending the procurement and installation of windows. The staff was pleasant to deal with and was able to offer us with an estimate as well as answer our inquiries. They were quite kind and professional. Our new windows were installed beautifully. Our salesman was very professional and addressed all of our questions.

Jin F

They've been patient and helpful right from the start of my project. It's been an absolute pleasure to work with you. For my home and rental property, I first purchased a front door, then a back door. This job was completed in stages that were convenient for me and helped in the completion of the project. It was a pleasure to deal with all of the installers.

Jeanneth L

I purchased a replacement door and We gave them a call to come out and give us a quote. The salesman came to my house and showed samples of door products. They were easy to deal with and communication was great. The installation was seamless and the installers were efficient and skillful. The great installation and service were amazing.