What Is a Silicone Roof Coating?
A silicone roof coating is a liquid-applied membrane, spray- or roller-installed directly over your existing flat roof. As it cures, it forms one continuous, seamless waterproof skin across the entire surface, sealing the seams, fasteners, and flashing details where older EPDM, TPO, metal, and built-up roofs almost always start leaking first.
Because it's a restoration, not a replacement, there's no tear-off, no dumpster of old membrane headed to the landfill, and little to no interruption for the tenants or operations below. A qualifying roof can often be cleaned, detailed, and coated in days rather than weeks, and the system carries a manufacturer warranty that can be renewed with a re-coat down the road. Stellar is GAF certified for commercial coatings, which is what makes those warranties real.
Here's our simple rule, and it comes straight from chemistry, not preference: if the roof is flat, it's usually silicone. If it's pitched, acrylic usually can do the job. Silicone is a solvent-based coating that's essentially waterproof the moment it cures, so it sits under ponding water for years without breaking down. Acrylic is water-based, so standing water is what dissolves it, but on a pitched roof that sheds, it's a cost-effective, highly reflective system. Flat roofs across Grand Rapids and the lakeshore rarely drain perfectly, and that's why this page is about silicone. For the full coating picture, including our acrylic systems for metal and sloped roofs, visit our commercial roof coatings page.
The Benefits of Silicone Coating
Seamless Waterproofing
A fluid-applied silicone membrane cures into one continuous, monolithic surface: no seams, laps, or fasteners for water to find. It bridges hairline cracks and seals around the drains, curbs, and penetrations that leak most on aging flat roofs.
Ponding Water Resistance
Silicone is the only common coating that shrugs off standing water without breaking down. It's roughly 95 percent solids and waterproof on cure, so what we apply is what stays, for years, even where water sits. On low-slope West Michigan roofs that pond after lake-effect rain and snowmelt, that's the decisive advantage, and it's why most acrylic warranties exclude ponded areas outright.
Reflective Energy Savings
A bright white silicone surface reflects up to 85 percent of the sun's energy, cutting cooling loads and rooftop temperatures. Cooler membranes also age slower, which extends the life of the whole assembly.
Restore Instead of Replace
Coating goes over your existing EPDM, TPO, metal, or built-up roof. No costly tear-off, no landfill debris, minimal disruption to the operations below.
UV and Weather Stability
Silicone doesn't chalk, embrittle, or lose flexibility from years of ultraviolet exposure the way lesser coatings do, so it holds up through Michigan's swing from summer sun to sub-zero winters.
Renewable Warranty
When a silicone system nears the end of its rated life, it can be washed and re-coated to reset the warranty, a fraction of the cost and hassle of another full replacement.
Silicone Coating Pros & Cons
Pros
- Seamless, fully adhered waterproof membrane
- Handles ponding water better than any other coating
- Highly reflective, lowers cooling costs and roof temperatures
- No tear-off, no landfill waste, minimal downtime
- Excellent UV stability, won't chalk or embrittle
- Renewable: wash and re-coat to reset the warranty
Cons
- Not a fix for wet insulation or structural deck damage, and never sold as one
- Cured silicone is slick when wet, so walk pads go wherever there's foot traffic
- Only silicone bonds to cured silicone, so future re-coats are locked into the chemistry
- Dirt pickup dulls the reflective surface over time, which periodic cleaning solves
- Requires a clean, sound substrate and dry weather to apply
- Flat and low-slope roofs only; on pitched roofs, acrylic is the right coating, and shingles don't get coated at all
Silicone vs. Acrylic vs. Replacement
| System | Service Life | Installed Cost | Ponding Water | Notes |
|---|---|---|---|---|
| Silicone Coating | 15 to 20 yrs per cycle | Roughly $3.50 to $7 per sq ft | Excellent | The flat-roof coating. Re-coatable to renew the warranty. |
| Full Restoration System | 15 to 20 yrs per cycle | Roughly $4 to $8 per sq ft | Excellent | Coating plus reinforced seams and details for roofs that need more work before the silicone goes down. |
| Acrylic Coating | 10 to 15 yrs | Roughly $2.50 to $5.50 per sq ft | Poor | The pitched-roof coating: right on metal and sloped roofs that shed, wrong under standing water. |
| TPO Replacement | 20 to 30 yrs | Roughly $6 to $11 per sq ft | Good | New single-ply membrane, full tear-off and disposal. |
| EPDM Replacement | 25 to 30+ yrs | Roughly $4.50 to $9.50 per sq ft | Good | Durable rubber; seams are the common failure point. |
Coating costs assume a sound, cleanable substrate; badly deteriorated roofs need repairs first. Figures are West Michigan planning ranges, not a quote. We confirm your number after an on-site inspection and moisture scan.
What Does Silicone Coating Cost?
For most West Michigan commercial roofs, a professionally installed silicone restoration runs roughly $3.50 to $7 per square foot, and a full restoration system with reinforced seams and details runs $4 to $8. Where a project lands in those ranges depends on the mil thickness specified, how much seam and detail reinforcement the roof needs, how much wet insulation must be cut out and replaced first, and roof access.
Put in perspective, a full membrane replacement typically runs $4.50 to $11 per square foot once you add tear-off, disposal, and new insulation, and complex commercial replacements run well past that. What a coating buys on a qualifying roof isn't just the line-item price. It's 15 to 20 years of renewed waterproof life with no tear-off, no dumpsters, no interruption to the operations below, and a renewable warranty instead of another capital project. It may also be treated as a maintenance expense rather than a capital improvement, which many owners and their accountants prefer. Confirm that treatment with your accountant; we'll provide the documentation.
The catch: coating only pencils out on a roof that's still fundamentally sound. If a moisture scan shows the insulation is soaked across large areas, you're paying to seal in a problem, and at that point replacement is the smarter long-term investment. That's exactly the honest call we make for you before recommending anything. We're not here to sell you the biggest project. We're here to give you the number that actually protects the building.
When Silicone Coating Makes Sense
A Good Candidate
- Aging EPDM, TPO, metal, or modified bitumen roofs that leak at seams and details
- Low-slope roofs that pond water after rain or snowmelt
- A structurally sound deck with limited wet insulation
- Owners who want to defer a full replacement and its capital cost
- Buildings that must stay open, since coating applies with no tear-off
- Flat metal roofs with surface rust and leaking fastener penetrations
Not the Right Fit
- Roofs with widespread saturated or rotted insulation below the membrane
- Steep-slope shingle roofs; coatings are a flat and low-slope product, and pitched metal gets acrylic, not silicone
- Structural deck damage that must be opened up and repaired first
- Roofs with heavy grease or chemical exposure, which need a specialty approach
- Ballasted gravel roofs that can't be cleaned to a sound substrate
- Any roof where the moisture scan shows failure has already spread wide
Our Silicone Coating Process
Inspect, Moisture Scan, and Adhesion Test
We survey the roof, core-test or infrared-scan for trapped moisture, and confirm the deck and insulation are dry enough to coat. Then we run an adhesion test on the substrate, on every roof, per manufacturer requirements, before a drop of coating is ordered. If the coating won't bond, we find out now, not three winters from now.
Clean and Prep
The membrane is power-washed, seams and flashings are reinforced, and any wet insulation is cut out and replaced.
Prime and Detail
We prime as the substrate requires, then seal drains, curbs, penetrations, and terminations, the spots that leak first.
Apply Silicone
The high-solids silicone is spray- or roller-applied at the specified mil thickness, curing into a seamless, warrantied waterproof membrane.
Once your roof is coated, the smartest thing you can do to protect the investment is stay on a roof maintenance program: periodic cleanings, drain clearing, and quick detail repairs keep the warranty valid and set up the re-coat that renews the system when the time comes.
Built for Michigan's Freeze-Thaw Winters
West Michigan puts flat roofs through brutal cycles: ponding autumn rain, heavy lake-effect snow, then dozens of freeze-thaw swings that pry at every seam. Silicone stays flexible in the cold, sheds nothing to standing water, and reflects the summer sun, which is exactly why it outperforms acrylic on flat roofs here. A properly installed system lasts 15 to 20 years and gets renewed rather than replaced.
Coat It or Replace It?
The right answer comes down to how much of your roof is still sound. We core-test and scan for trapped moisture, then lay out your options in plain language with a written estimate, and on commercial projects we can pair it with commercial lending.
A silicone coating is usually the smart move when:
Not sure which way to go? Schedule a free flat-roof inspection or call or text (616) 840-1927 and we'll give you the honest answer.
Explore Flat-Roof Services
Commercial Roof Coatings
Our full coating and restoration service, silicone and acrylic.
Learn MoreCommercial Roofing
TPO, EPDM, and flat-roof systems for West Michigan buildings.
Learn MoreRoof Maintenance
Preventative programs that protect your coating investment.
Learn MoreRoof Inspection
Book a professional flat-roof condition assessment.
Learn MoreSilicone Roof Coating Questions
How long does a silicone roof coating last?
A properly installed silicone coating lasts about 15 to 20 years in West Michigan. Because only silicone bonds to cured silicone, the system can be washed and re-coated at the end of its rated life to renew the warranty for a fraction of replacement cost, so the useful life of the roof extends for decades with periodic re-coats.
How much does silicone roof coating cost in West Michigan?
Most professionally installed silicone restorations run roughly $3.50 to $7 per square foot, with full restoration systems at $4 to $8, depending on mil thickness, seam and detail reinforcement, how much wet insulation must be replaced, and roof access. A full membrane replacement runs roughly $4.50 to $11 per square foot and up once you add tear-off, disposal, and new insulation. We confirm your number after an on-site inspection and moisture scan.
Should I use silicone or acrylic on my roof?
The roof decides. If it's flat or low-slope, it's silicone, because silicone is waterproof on cure and sits under ponding water for years while water-based acrylic softens and washes away under it. If it's a pitched metal or sloped roof that sheds water, acrylic is the cost-effective, highly reflective choice, and it's what we install there. We run both systems, and we run an adhesion test on every substrate before either one goes down. Silicone runs roughly $3.50 to $7 per square foot and acrylic $2.50 to $5.50, priced firm after inspection.
Can silicone coating be applied over my existing flat roof?
Yes. Silicone is designed as a restoration that goes directly over an existing EPDM, TPO, metal, modified bitumen, or built-up roof after cleaning and detailing, with no tear-off. The one requirement is a fundamentally sound substrate. If the moisture scan shows saturated insulation over large areas, those sections get replaced first, or replacement becomes the better answer, and we'll tell you which.
Will a silicone coating stop my roof from leaking?
In most cases, yes. Silicone cures into a seamless, fully adhered membrane that seals the seams, fasteners, drains, and flashing details where flat roofs almost always leak first. The exception is a roof where water has already saturated the insulation or damaged the deck; coating over trapped moisture only hides the problem. That's why we moisture-scan every roof before recommending a coating, not after.
Does a reflective silicone roof actually save energy?
Yes. A bright white silicone membrane reflects up to 85 percent of the sun's energy, lowering rooftop temperatures and reducing summer cooling loads for the building below. Cooler membrane temperatures also slow the aging of the whole roof assembly, so the reflectivity protects your utility bills and the roof itself. Keeping the surface clean keeps the reflectivity working, which is one more thing a maintenance program earns its keep on.