![]() So, you can double the thickness of the plexiglass before it weighs as much as the glass pane. When comparing those two equal sheets of glass and plexiglass, the plexiglass weighs half as much as the glass. However, because plexiglass is much lighter, this may not be as difficult as it sounds. A sheet of plexiglass needs to be thicker to match the insulating property of a glass pane. If you compare two equal sheets of glass and plexiglass, both of the same thickness, the glass will be the better insulator. It's partly because comparing glass and plexiglass requires considering several points. Easier to recycle and more environmentally consciousĭepending on who you ask, there's some debate about which material offers better insulation. ![]() In general, cheaper at initial purchase than plexiglass.Reflects less light, which reduces glare.In general, cheaper for long-term maintenace.Stronger and more resistant to breaking than glass.To compare some of the differences: Plexiglass Is Plexiglass As Good As Glass?ĭepending on what your goal is, plexiglass can be as good (or better) than glass. These can act as a solvent that attacks the plexiglass or weakens it. Be sure to pick a true silicone, as many brands mix other chemicals such as xylene into their formula. In this case, silicone caulk is likely your best choice. However, butyl caulk probably won't stick well to a painted surface. Note this makes it a suitable choice for both plexiglass and the window frame.Ĭlick here to see butyl rubber sealant on Amazon. It's very adhesive and can stick to a variety of surfaces. If you absolutely want to use caulk for your plexiglass window, try using butyl rubber caulk. Some of these materials are not compatible with windows, and they won't seal properly. However, the elastic nature of caulk and the texture do not always let it bond well to plexiglass.Ĭaulk comes in different formulas, using acrylic or latex. If your window is already installed and you only have small gaps to seal, it's possible to use caulk. Window grooves are generally larger than this. But it works best for gaps that are 1/4 inch or less. But as a general rule, glazing putty is better than caulk for sealing a plexiglass window.Ĭaulk can be convenient, as it's fast to cure and easy to install. Window glazing putty and caulk are similar products, as they are both helpful for sealing potential air leaks. Can I Use Caulk To Seal A Plexiglass Window? Just fill in the grooves, skipping the above details for placing a new window. If you are trying to seal a window that is already installed, this is the only step necessary. Use the putty knife to insert as much as needed, smoothing it out as you work. When the window is securely in place, add more glazing putty to completely fill the window's grooves. Doing this holds the plexiglass pane in place. Once all four corners have glazing points, add more points roughly every eight inches around the window. Push the point facing the wood into place with the putty knife.Ĭlick here to see these glazing points on Amazon. Then be sure to install glazing points into all four corners of the plexiglass. Fill in the grooves with a thin coat of glazing putty the entire way around the window.Ĭlick here to see glazing putty on Amazon. To seal the window, first, use a putty knife to apply the glazing compound. In most cases, window glazing putty is the best way to seal a plexiglass window. And if you're not ready to replace your glass windows yet, we have suggestions for building plexiglass storm windows that work with existing glass windows. We'll explain why caulk doesn't always work and cover caulk that does. Keep reading, as we'll give you the steps, whether you're installing a new plexiglass pane or need to seal one already in place. Glazing compound is usually the better option for making your windows air-tight. While caulk is also a common sealant for windows, it can be tougher to use on plexiglass. Use window glazing putty to seal plexiglass, keep out drafts, and close gaps. So how do you seal a plexiglass window? We've checked with contractors on the differences between plexiglass and glass for the details. However, most installation advice and tips still pertain to traditional glass windows. But plexiglass, while less common, is becoming a popular choice. When you think of windows, you probably picture big panes of glass.
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