Technical FAQs

Technical and DIY FAQs

Detailed answers for serious DIYers and installers. Click a question to expand the answer.


Surface prep

What is the most common reason roof coatings fail?

Surface prep is the most common cause of coating failure. Coatings fail due to contaminants (dirt, oils, oxidation, chalking), wet substrates, or applying over loose and unstable materials. Prep is essential for long-term performance.

How clean does the roof need to be?

Clean enough that rubbing the surface with a light-colored rag does not pick up heavy residue. Remove loose coatings, flaking material, and embedded dirt. Pressure washing is commonly required. If your substrate is delicate, use a gentler cleaning method that still removes contaminants. Call us for details.

Do I need to repair seams, penetrations, and fasteners first?

Yes. Coating is part of a system. Address obvious failure points first: open seams, failed sealant, loose fasteners, punctures, and damaged flashings. Then coat. Please call us before applying anything if you have failures. We can talk you through which products are right for each issue.

Application and conditions

How does silicone cure?

Silicone cures by reacting with moisture in the air. It typically skins over first and continues curing after. Curing speed is influenced by temperature, humidity, airflow, and applied thickness. The more humid it is, the faster it will cure. They less humid, the slower.

What weather conditions should I avoid?

Avoid applying when rain is expected before skin-over, when dew is likely to form immediately after application, or when temperatures are outside the product guidelines. Wind can also introduce debris into uncured coating.

How do I hit the correct thickness?

Use the coverage rates located here and measure your roof sections. EXAMPLE: if you have an EPDM roof, one 4.75-gallon bucket will yield roughly 200 square feet. If your roof is 1,000sf big, segment the roof into 5, 200sf segments. One bucket, spread evenly throughout that segment will give you consistent coverage in that segment. Repeat that through each segment for even coverage.

A common mistake is trying to stretch material too far. Consistent thickness matters for performance and longevity. Make sure you are using enough coating to get desired results.

Can I recoat silicone later?

Yes. Silicone-to-silicone adhesion is typically strong when the surface is properly cleaned and prepared. Maintenance recoats are common for long-life coating systems.

Performance

Does silicone resist ponding water?

Silicone is known for strong resistance to ponding water compared to many other coating types. Ponding often indicates slope or drainage problems. Fixing drainage improves any roof system’s long-term performance. Ponding water can shorten the life of the silicone, so be sure to try to eliminate the ponding ares prior to coating.

What does silicone do for UV exposure?

White silicone coatings help protect the substrate from UV-driven degradation and can reduce heat absorption when reflective. This helps slow cracking, drying, and surface breakdown that often occurs over time on exposed roof materials.

How long will a silicone coating last in the field?

Service life depends on prep quality, thickness, roof movement, weather exposure, and maintenance practices. Periodic inspection and cleaning improve longevity. Our coating can be expected to last 5-20 years with proper cleaning, ample coverage, and a roof substrate suitable for coating.

Troubleshooting

What if the coating does not seem to cure?

Confirm the substrate is dry, verify temperature and humidity are within guidelines, and ensure the material was mixed and applied correctly. Cold temperatures can slow curing, and contamination can interfere with bonding. Setting up a sprinkler around the curing coating (NOT directly hitting it) can help speed up curing. The coating will pull the water vapor out of the air.