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This video is to bring you a closer look at the Pemko S771C adhesive astragal or meeting style seal. Available in clear as you can see, a dark bronze, and a white as well. Installed on pairs of doors for the meeting style. It is intended to help retard the transmission of sound, heat loss, smoke, and as a general weatherization product. Dimensionally this item is 7/16″ wide and 1/4″ tall and it’s hard to measure that small area with a tape measure. It is very compressible. The S in the parts stands for silicone, the 771 means it is a single fin sort of design, and the S772 is the same design but it is slightly wider and not as tall and has 2 fins. It stays flexible 58 below and 450 degree Fahrenheit. When you are applying this the frame needs to be utterly clean and completely clean and free of any dust or debris. If the frame has been recently painted you want to make sure the paint has cured, at least a week before painting it and applying this material. If there is any dust or debris on the frame or the paint isn’t fully cured, it would be quite a compromise for the adhesive to do its job. I’ve sold this to people who have used it as typical perimeter gasketing as well hence the reference to a frame. When you are installing this, Pemko will have you in the recommended installation work with an 18-24″ length piece is generally what I see in the installation instructions but in my experience I like working with a much shorter piece (maybe 12″). The reasoning is this material is very flexible and you can end up with an unintentional wavy result or if you are working with a long exposed piece you might unintentionally bump it onto the surface prematurely causing you to pull that off. So I have found that working with a much shorter length allowed me better control over it and neatness and appearance is the bottom line. The door edge or your framed edge is very straight and you will see any waviness to this at all when you are installing it. Most importantly when you are installing this, if you have any inside corners you are going to want to make sure to cut this and miter it and don’t try to run it in a continuous run around your frame. The intended purpose of this is just to provide that seal however I have used it and had great success with using it to mediate the dust from a shop and showroom, front and back doors of a building, and the dust just seems to get carried in with the wind and is not ideal. I can even see on the frame where the dust was being backed up and this being effective. Important note is that regarding the adhesive, Pemko wants you to use it with the first 6 months and it is to be stored in 50 degree-100 degree temperatures or otherwise you would have a problem with the adhesive and it won’t be able to do its job. A lot of people like this material because it is really easy to put on and no tools required except a scissor or a utility blade. Available in specific lengths- 7ft, 8ft, 9ft, and 10ft and as a result of that this is really intended to be used between doors. If you were going to do something else with it outside of what is is intended or wanted to do 3 doors you would need to order 3 pairs of the 7ft rolls. This is a meeting style astragal and a very good quality item. Pemko is a full line of all things weather stripping and not just things adhesive baked gasketing like this, but a full line of thresholds, door sweeps, perimeter gasketing, material made from aluminum, stainless steel, and architectural bronze and a full line of residential weather stripping as well. Any question on the Pemko S771C or any other Pemko product please feel free to reach out to us. Thank you very much.
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