The Importance of Adhesion When Applying Elastomeric Roof Coating System

When it comes to roof coatings, there are many different types to choose from. One of the most popular is elastomeric roof coatings. These coatings are known for their durability and weather resistance. But many people don’t know that adhesion is a critical factor in ensuring that your elastomeric roof coating system performs well over time. In this blog post, we will discuss how adhesion works and how you can use it to your advantage when applying an elastomeric roof coating. Stay tuned!

How Adhesion Works With Elastomeric Coatings

Adhesion is the process by which two materials are bonded together. This process binds the coating material to the roof’s surface in elastomeric coatings. There are two main types of elastomeric roof coatings: silicone and acrylic. Silicone coatings are typically more expensive than acrylics, but they offer better resistance to extreme temperatures and UV radiation. On the other hand, acrylics are easier to apply and usually have a longer lifespan. Regardless of the elastomeric coating you choose, it’s essential to ensure that the surface is properly prepared before application. This usually involves cleaning the surface with a solvent or degreaser and then etching the surface with an acidic solution. Once the surface is prepared, the elastomeric coating can be applied using a brush, roller, or sprayer. Elastomeric coatings are commonly used on flat roofs and metal roofs, but they can be used on any roofing material.

How to Ensure Proper Adhesion With Elastomeric Roof Coatings

Compatible Coating and Roofing Substrate

While there are many roof coatings on the market, they cannot all be applied to every roofing substrate. There are coatings explicitly made for asphalt, BUR, Mod Bit, and Cap sheet roofing; Single-Ply Membranes – TPO, EPDM, Hypalon, and PVC; SPF, Metal, and Concrete substrates. These formulations provide the maximum adhesion possible to each of their respective substrates. For example, Single-Ply membranes are the toughest to adhere to due to their physical deterioration and the leftover residue. Consequently, most roof coatings need a caustic primer or etching rinse before applying an elastomeric coating. Although this additional step is costly and time-consuming, it enables proper adhesion. AcryShield A502 is a fast and simple solution for Single-Ply roofing that does not require a primer or etching rinse. This elastomeric roof coating directly and securely adheres to your membrane, providing an affordable option to fix your roof quickly.

Existing Roof Membrane Surface

The slightly rough surface texture helps the coating material to grab hold and adhere better. In addition, the contact between the coating and roof can be improved by a rougher surface, as coatings are usually sprayed on first before they fill in any gaps or indentations in the membrane. This gives the coating more area to cling onto. However, if the texture is too harsh, it can create air pockets between the coating and the roof substrate. Before beginning any application, pressure wash and clean the substrate to ensure no dirt, film, or other residues that could prohibit the coating from directly adhering to it. You also need to ensure there are no areas on the existing roof that are not 100% adhered to. If so, remove these areas before applying the roof coating, as this can also cause air pockets and defects in the system.


Lastly, we will discuss cohesion. This term refers to the ability of a coating to produce the strength and bonding required to hold itself together as a cured and durable coating. However, weather conditions, coating thicknesses, and cure times are all factors that can either enhance or diminish the cohesion in the coating. To avoid any issues, it is best practice to follow the manufacturer’s recommended application guidelines, as each has different requirements for obtaining ideal cohesion.

The Importance of Silicone Roof Coating

While silicone roof coatings are relatively new, they offer several advantages over elastomeric coatings. Unlike other roof coatings, silicone is highly resistant to UV radiation and extreme temperatures. In addition, silicone coatings are low-VOC and safe for the environment. When applied properly, silicone roof coatings can last for years, providing an effective barrier against water and weather damage. For these reasons, silicone roof coatings are an increasingly popular choice for commercial and industrial roofing applications. Thus, it would be best if you considered getting a silicone coating for your roof.

How an Elastomeric Roof Coating Promotes Energy Efficiency

Elastomeric roof coatings are a type of painting that is applied to roofs in order to promote energy efficiency. This is because elastomeric roof coatings help to reflect sunlight rather than absorb it. This helps to keep your home cooler in the summer months, which reduces the amount of energy that is needed to cool your home. In turn, this can lead to lower energy costs and energy bills. Elastomeric roof coatings are also effective in winter, as they help to insulate your home and prevent heat loss. This can increase energy efficiency and lower energy costs throughout the year. Ultimately, elastomeric roof coatings effectively promote energy efficiency in your home and save money on your energy bills.

Prevent Standing Water With Elastomeric Coatings

Elastomeric coatings are a type of waterproof coating commonly used on roofs. They are applied as a thick, rubbery coating that can fill in cracks and imperfections. One of the main benefits of elastomeric coatings is their ability to prevent standing water. When applied to a roof, elastomeric coatings create a smooth surface that causes water to roll off instead of ponding. This is especially important in the winter months when snow and ice can cause significant damage to a roof. By preventing standing water, elastomeric coatings help extend a roof’s life and protect it from weather-related damage.
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