How long does silicone roof coating last? An average of 15 years. That’s 15 years of extending the life of the existing roof while simultaneously protecting it from further damage.  

Silicone is a solvent-based sealant, meaning it’s thicker than acrylic and other water-based sealants. With silicone roof coatings, your roof might not need multiple coats to reach the desired level of thickness. It also goes on easier in hot environments, since it doesn’t thin as much as water-based sealants do. Fewer coats + easy application = less work. That’s a win-win.

Inland Coatings picture of white silicone roofing

Reasons to choose silicone

Liquid silicone coating protects flat roofs from deterioration, but what else does it do? Quite a bit, actually:

Saves energy — Silicone coatings’ white coloration reflects UV rays, keeping the commercial roof surface cool and the building at a comfortable temperature. As a result, energy bills can be reduced by up to 30%.

Adapts to weather conditions — Expansion and contraction based on weather conditions contribute to the coatings’ durability. It reduces the likelihood of cracks forming in the material and water getting underneath the coating, or worse, into the building.

Stops leaks — Since a silicone coating roofing system is applied as a liquid, it forms one continuous membrane as it dries. That makes it difficult for water to seep through. Instead, water ponds on the roof and remains there until it drains or evaporates.

Requires little downtime — Your business doesn’t need to close due to roof restoration like it might with roofing repair. Go on with business as usual while a qualified roofing contractor applies the silicone coating on a short timeline, normally about three days. There are no special considerations for curing, either, because, unlike paint, moisture aids in the silicone coating curing process. 

Installs easily — Not only is it quick, but installation is also relatively easy. A roofing company will prep the surface by power washing it to remove any dirt or debris, apply primer if needed, then apply the silicone coating.

Can be re-applied — Did you know, you can apply a new coating directly on top of the old coating? Silicone roof coatings last for 10 – 15 years, and after that, you can apply silicone coatings a second time as a preventive measure.


Silicone roof coatings are made for metal, single-ply membrane, granulated modified bitumen and sprayed-in-place polyurethane foam roofing. On these roof types, silicone coating creates a seamless membrane that keeps water out. It also prevents damage from ponding water, UV rays and strong winds. These properties make it a great choice for any climate, even those with heavy rain and intense sun exposure.

Before/After Single-ply Membrane Application

If you’re looking to extend the life of your flat roof, consider silicone roof coatings. You’ll get all of the benefits of installing a new roof while saving money, time and effort. Get the answers to more of your
roof coating questions below and on our website.

Frequently asked questions

How long does silicone roof coating last?

When applied correctly, it can last up to 15 years. That’s one of many great features of silicone roof coating — you get significant use out of it. Annual inspections and maintenance will help ensure it lasts as long as possible. 

Is silicone roof coating worth it?

Absolutely. Installing silicone roof coating is beneficial to building owners because it introduces features such as durability, flexibility and resistance to ponding water. Silicone is one of the best coating materials available as it doesn’t erode quickly or become brittle. 

What is the longest-lasting roof coating? 

The longevity of the coating depends on how thick the roofing material is applied. A 30-millimeter thick coating can last 10 years longer than a coating that’s 20 millimeters thick. It may take multiple coats to reach the desired thickness. Refer to our product page to determine the best number of coats for the product you’re using.