Best Use Cases for Silicone Roof Coatings

By Karen L Edwards 10-08-2020
QUICK SHARE
Tag Icon

Silicone roof coatings are known for their ability to provide excellent UV, water, and weathering resistance. This can make them a great choice for many low-slope roofs.

Here's a look at the strengths of silicone roof coatings and the use cases they're best suited for.

The Benefits of Silicone Roof Coatings

Silicones are high-performing polymers that can be found in many consumer products, paints, and coatings. Silicone-based roof coatings are a popular choice for low-slope roofs because they:

  • Are stable at a wide range of temperatures
  • Help protect against leaks caused by ponding water
  • Provide resistance to biological growth like algae and mold
  • Adhere well to many different substrates
  • Can provide a reflective coating if white or light colors are selected

Types of Silicone Roof Coatings

Silicone roof coatings are available in a few different formulations, including formulations with high solids.

High solids coatings have fewer solvents in their formulation, meaning the product will experience less evaporation during installation. It might be slightly more expensive than other formulations, but because of the high solid formulation, you'll probably use less product overall to achieve your desired dry mil thickness.

Solvent-based silicone coatings may be desirable because the incorporation of solvent in the formulation can result in faster drying times than water-based coatings. They can also be stored and applied at lower temperatures without risk of freezing. However, the solvents are highly volatile, so care must be taken to keep vapors away from sparks or flames to avoid combustion. Solvents can also be odorous, so additional steps may be required to ensure the safety of workers and building occupants. it is important to close building air intakes during installation.

Use Cases for Silicone Roof Coatings

High Solids Coatings

High solids coatings may be a suitable choice for low-slope roofs in high-moisture areas. The coating will perform well even in roof areas that are subject to ponding water.

High solids silicone coatings can also be installed with minimal disruption to building occupants. With low VOC content, they could be an ideal choice for high-occupancy buildings like healthcare facilities, nursing care facilities, daycare centers, and schools.

High solids silicones can be used over many types of existing roofs, including metal, structural concrete, single-ply membranes, and asphalt roofs. They are also a good fit for installing over polyurethane foam on new or existing roofs.

Solvent-Based Coatings

Solvent-based silicone coatings also perform well in areas where high moisture and humidity are present. The evaporation rate of the solvents is not affected by the amount of moisture in the air.

Solvent-based coatings are a versatile option because they can be installed in temperatures ranging from 40 degrees Fahrenheit (4.44 °C) to 110 degrees Fahrenheit (43.33 °C). They also enable flexibility in their application method, allowing for use of a brush, roller, or sprayer.

When to Consider Other Coating Types

Keep in mind that silicone coatings, whether solvent-based or high solids, form a slick surface that might not be suitable for roofs with high foot traffic. They do not resist dirt pickup as well as other types of coatings and may require cleaning to maintain reflective properties.

If you are unsure which type of roof coating will be the right fit for your roofing project, GAF can point you in the right direction. Or, you can learn more about the roof coating options available to you.

Don't miss another GAF RoofViews post!
LATEST UPDATES
Roofing renovations were a top exterior upgrade in 2021, and continue to dominate the home improvement market in 2022. As you might plan to renovate or replace your roof, it makes sense to also think about what roof shingle color you should choose.
An attractive house and roof color combination can give your home a major boost in curb appeal. Not only does adding visual appeal make the place feel like it's yours, but it also brings a higher resale value. On average, homes considered to have curb appeal sell for 7% to 14% more than similar homes with less visual appeal, according to the Journal of Real Estate Finance and Economics.
At GAF, our commitment to protect what matters most means more than manufacturing sustainable roofing products. It includes investing in our people, our planet and our business so we can work toward a more sustainable future.
Up to 25% of the United States experiences large hail episodes-and when they do, hail can cause severe damage to roofs and the HVAC equipment stored there. Hailstorms account for 70% of the average annual property losses from severe convective storms in the US. Building owners can protect their buildings and equipment by designing their buildings and roofs to withstand the damage caused by large hailstones.
Ya sea que estes comenzando en tu negocio o te consideres un profesional con experiencia , GAF tiene la capacitación para contratistas de techos que te ayudarán a tener éxito. Es por eso que la empresa fundó el Centro para el Avance de la Educación en Techos(CARE) con el éxito del contratista en mente.
In business, time is money. With advanced roofing technology, you can save time, improve your team's efficiency, and boost your company's bottom line all at once. Ranging as widely as business management systems that streamline productivity and digital measuring tools, here are a few roofing products and solutions to incorporate into your business so you can work smarter rather than harder.
This blog contains information created by a variety of sources, including internal and third party writers. The opinions and views expressed do not necessarily represent those of GAF. The content is for informational purposes only. It is not intended to constitute financial, accounting, tax or legal advice. GAF does not guarantee the accuracy, reliability, and completeness of the information. In no event shall GAF be held responsible or liable for errors or omissions in the content or for the results, damages or losses caused by or in connection with the use of or reliance on the content.

Interested in sharing or republishing our content? We kindly ask you to adhere to our guidelines.