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Silicone vs Acrylic Elastomeric Coatings

Which System is Right for Your Roof

Silicone Roof Coatings vs Ponding Water

Ponding water is no match for a silicone coating on your flat roof. Silicone forms a monolithic membrane that can resist ponding water better than any other coating. Silicone coatings will maintain their adhesion and remain leak-free even when under the pressure of ponding water. There are very few other coatings that can say the same. Also, because silicone coatings are specially formulated to be non-sacrificial, they don’t chalk away over time. Rather than slowly deteriorating and becoming useless, coatings pretty much stay in the same form after installation. Another benefit of silicone is that they are resistant to UV exposure and reflect a large majority of the sun’s heat and light, cooling your structure and lowering your cooling cost and wear and tear on your cooling equipment.

When is an Elastomeric Hybrid System a Good Option?

Generally, positively sloped roofs with inclines greater than 1/12 are excellent candidates for acrylic top coats. Roofs with a positive slope and proper drainage that do not have areas where water ponds can benefit from these types of systems. Silicone is still utilized in areas of high-water traffic and possible ponding. Acrylic systems should not be used on near dead-flat sloped roofs or roofs that are highly susceptible to ponding since Acrylic is likely to swell and blister, causing water intrusion underneath the coating, leading to potential leaks in the roofing system and coating delamination.

Elastomeric Coating vs Elastomeric Hybrid System


Many customers are fooled by roofers giving them a low price for what they present as an Acrylic “system” when in fact they are spraying on a thin layer of Acrylic roof coating that will likely fail within 1-3 years. We receive calls after every rain to repair these “new” roofs.  A Hybrid Acrylic systems takes into account the roof’s design and unique flow of water off that roof. We design a custom solution for each of our customers that qualify for this type of system. A hybrid system involves reinforcing fabric between multiple layers of Acrylic coating along with a silicone coating on and around areas of ponding water and high rain traffic.



Silicone Roof Coating Key Benefits:


  • Seamless waterproofing

  • Superior ponding water resistance.

  • Energy cost savings due to highly reflective, UV resistant capabilities

  • Superior adhesion and durability

  • Extends the lifespan of your roof with lower roof maintenance costs

  • Eliminates the need for a costly tear-off, roof disposal and landfill waste

  • Environmentally Friendly – Low VOCs, solvent free, and fewer toxic emissions during installation

  • Same year tax write-off for businesses



Acrylic Hybrid Roof Coating Key Benefits:


  • Monolithic, long lasting system

  • Lower cost than full silicone system

  • Superior tear resistance for higher traffic roofs

  • High reflectivity and solar reflectance

  • Greater Dirt Pickup Resistance

  • No tear-off or building permits required

  • Same year tax write-off for businesses

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