Need help picking a metal roof sealant? Let our experts help by calling (800) 750-9198.
Metal roofs offer striking good looks, excellent fire resistance, and impressive durability. Additionally, homeowners can expect a properly maintained metal roof to last for 40 years or more!
However, without proper sealing, your metal roof may not last as long as you expect it to. Keep reading to learn more about sealing a metal roof and the most common types of roof sealant.
1. Silicone Sealants
Silicone is one of the best types of roof sealants on the market. It features strong UV and water resistance, which makes it ideal for metal roofs that take a beating from Florida’s rain and sun.
Silicone also has impressive adhesion, has good flexibility and lasts longer than many other types of sealants. In addition, it offers high heat resistance compared to other kinds of sealants.
For best results, choose an inorganic oxime silicone sealant. This type of silicone won’t crack or fade but keep in mind that it’s not paintable, so you’ll want to buy a sealant that matches the color of your roof.
2. Polyurethane Sealants
Polyurethane sealants are inexpensive but have some downsides. For instance, polyurethane doesn’t stand up to cold weather, and in areas with harsh winters, the sealant will likely degrade over time. By itself, a polyurethane sealant doesn’t stick to metal well.
If you opt for polyurethane sealant, you’ll need to use it with a primer.
3. Polymer Sealants
Polymer sealants are tough against extreme weather like Florida’s occasional hurricanes. They also release fewer volatile organic compounds (VOCs), which may appeal to people who want to avoid breathing toxic chemicals in their homes. Homeowners can also paint polymer sealants to match the color of their roofs.
4. Water-Based Sealants
Water-based sealants, such as acrylic and latex, have no strong odor, don’t generate VOCs, and are non-flammable. Unfortunately, water-based sealants evaporate as they cure, leading to shrinking and cracking. These sealants will also wash off if it rains before they have a chance to fully cure, which can take up to 48 hours.
Water-based sealants work well for general construction purposes, but they’re not ideal for metal roofs.
5. Solvent-Based Sealants
Solvent-based sealants can withstand the elements, but their thick consistency makes them difficult to work with and apply. They also emit fumes and have a foul chemical smell, so you’ll have to wear a respirator when working with them. When dry, solvent-based sealants have a glossy appearance, which you may or may not want for your entire roof.
6. Butyl Tape
Made from synthetic rubber consisting of copolymer and isoprene, butyl tape excels at adhering to metal, making it one of the best types of roof sealant for z-closures, vents, and pipe flashing. This double-sided tape is very sticky and provides a good seal against water, dirt, and other debris.
Professional Roofing Services You Can Count On
If you need more information about installing a metal roof, painting metal roofing, or other roofing services in the Orlando area, give our PRS Roofing experts a call at (800) 750-9198 today!
