APOC roof coating is a line of liquid-applied roof coatings made by Gardner-Gibson (part of ICP Group), sold in white reflective acrylic, 100% silicone, aluminum, and asphalt formulas under names like Rainshield, Silver Guard, and Energy-Armor. The product number tells you the chemistry and warranty tier, and the right one depends almost entirely on your roof material and whether the roof holds standing water. This guide decodes the APOC lineup so you can match a specific product to your roof instead of guessing at the store shelf.
The problem most buyers hit is that APOC sells more than a dozen coatings with numbers like 200, 243, 252, and 576, and the shelf tag rarely explains which one belongs on a metal roof versus a flat rubber roof. Below is the decoder, by chemistry, substrate, coverage, warranty, and price, so one pail choice is obvious before you climb the ladder.
What is APOC roof coating and who makes it?
APOC is a professional and DIY roof coating brand manufactured by Gardner-Gibson, a coatings maker with over 100 years of production history, now under ICP Group. The name covers reflective white acrylic and silicone coatings, bright aluminum coatings, and black asphalt coatings, plus matching primers. All are liquid-applied: you roll, brush, or spray them onto an existing roof to seal leaks, add waterproofing, and in the white grades, reflect heat.
APOC coatings are stocked at Home Depot, Lowe’s, and roofing distributors, which is why the brand shows up in searches more than most. The lineup splits into four chemistries, and picking the chemistry first narrows the choice fast. For the wider category and how each chemistry behaves, see our guide to roof coating types and cost.
The APOC product lines, decoded
APOC organizes its roof coatings into four chemistry families, each with its own sub-brand and product numbers. Acrylic and silicone are the white reflective grades used to restore aging flat and low-slope roofs. Aluminum and asphalt are the darker, lower-cost grades for metal and built-up roofs. The table maps the common product numbers to chemistry, best use, and warranty tier.
| APOC family | Common products | Chemistry | Best for | Warranty tier |
|---|---|---|---|---|
| Energy-Armor / reflective | APOC 241, 243, 252 (Sunwhite) | Acrylic elastomeric (243 and 252 siliconized) | Aged metal, mod-bit, BUR, concrete, aged TPO and EPDM | 7 to 15 year limited |
| Silicone | APOC 570, 576 | 100% silicone, high solids | Low-slope roofs with ponding water | Limited lifetime |
| Silver Guard / Liquid Silver | APOC 207, 208, 212 | Asphalt aluminum (207 non-fibered, 208 and 212 fibered) | Metal and asphalt-based roofs needing UV protection | Up to 5 to 7 year |
| Rainshield asphalt | APOC 200, 202 | Asphalt cutback (200 non-fibered, 202 fibered) | Foundations, flashings, black BUR patch and seal | Wet-surface repair grade |
Two rules cut through the numbers. Higher acrylic product numbers carry longer warranties: APOC 241 is a 7-year coating, APOC 243 a siliconized 10-year coating, and APOC 252 Energy-Armor Sunwhite is the premium acrylic modified with polyurethane. In the silicone family, APOC 576 is the 100% silicone, limited-lifetime grade that becomes rain-safe in about 15 minutes.
Which APOC coating for your roof type?
Match the coating to your roof surface, because a coating that fails to bond peels within a season. APOC’s white acrylics and silicones are built for aging low-slope membranes and metal; the aluminum and asphalt grades are for metal and built-up asphalt roofs. Confirm the exact substrate list on each product’s data sheet before buying, since compatibility drives the warranty.
- Flat or low-slope roof that ponds water: APOC 576 silicone. Silicone shrugs off standing water that would break down acrylic over time.
- Aged EPDM (rubber), TPO, mod-bit, or built-up roof: APOC 243 or 252 acrylic for a reflective white restoration, after cleaning and priming per the label.
- Metal roof needing heat reflection: APOC 243 or 252 white acrylic; for a low-cost UV coat without the white look, APOC 208 or 212 fibered aluminum.
- Foam (SPF) roof: a silicone or acrylic white top-coat; foam must stay coated, so see our notes on foam roof repair.
- Black BUR or flashings needing a quick seal: APOC 202 fibered asphalt coating, or 200 non-fibered for a base flood coat.
One warning that trips up DIY jobs: you cannot reliably re-coat a cured silicone roof with acrylic later, because almost nothing except more silicone sticks to silicone. Choose the chemistry you can live with for the roof’s remaining life. For the wider decision, compare options in our best roof coating for a flat roof breakdown.
How much APOC roof coating do you need?
Coverage depends on chemistry, coats, and how rough the roof is, but a working estimate is about 1 to 1.5 gallons per 100 square feet per coat for acrylic in a two-coat system, and roughly 1.5 gallons per 100 square feet for a single-coat silicone application. Always confirm the exact rate on the product data sheet, because a rough or porous surface can push consumption 20% higher.
Worked example for a 1,500 square foot flat roof using APOC 243 acrylic in two coats: at roughly 1.25 gallons per 100 square feet per coat, that is about 18.75 gallons per coat, or roughly 37.5 gallons total. A 4.75-gallon pail covers about one coat on 380 square feet, so plan on about eight pails for the two-coat job, plus extra for seams and flashings.
APOC recommends two thin coats rather than one thick coat, and thin coats cure more evenly and hide fewer pinholes. Buy primer separately when the data sheet calls for it, such as APOC 103 Bond N’ Prime on asphalt or 290 for self-adhered membrane. Liquid-applied systems and their coverage math are covered further in our guide to liquid applied roofing.
How to apply APOC roof coating
APOC coatings go on over a clean, dry, primed roof in two thin coats, with temperature and weather timed so the coating cures before dew or rain hits. Rushing prep is the top cause of early failure, so budget most of the job for cleaning and repair, not rolling. The core process is the same across the acrylic and silicone grades.
- Clean the roof. Power-wash off dirt, chalk, and loose coating; a coating only bonds to a sound surface. Clear gutters and let the deck dry fully.
- Repair and reinforce. Seal seams, penetrations, and cracks with APOC sealant or fabric-and-coating over open joints. Fix ponding-prone low spots where you can.
- Prime if required. Apply the primer the data sheet specifies, such as APOC 103 on asphalt, and let it flash off.
- Check the forecast and temperature. Apply at 65 degrees F and rising, with several dry hours ahead. Humidity above 50% or temperatures below 80 degrees F can add up to 12 hours to full cure.
- Roll the first coat. Apply an even, thin base coat across the whole roof. Back-roll to work it into the texture.
- Apply the second coat. Once the first coat is dry to the touch, apply the second, ideally at a right angle to the first for full hiding. Silicone grades like APOC 576 become rain-safe in about 15 minutes, while acrylics need longer.
What does APOC roof coating cost?
APOC coatings are priced by chemistry, and at Home Depot and Lowe’s the pattern is consistent: asphalt and aluminum grades are cheapest, acrylic sits in the middle, and 100% silicone costs the most per pail. Retail pricing changes, so treat these as planning ranges and check the current shelf or online price before buying.
| APOC chemistry | Example product | Typical retail range (4.75-gal pail) | Installed material cost per sq ft |
|---|---|---|---|
| Asphalt (Rainshield) | APOC 202 fibered | about $40 to $80 | roughly $0.15 to $0.35 |
| Aluminum (Silver Guard) | APOC 208 or 212 | about $60 to $110 | roughly $0.25 to $0.45 |
| Acrylic elastomeric | APOC 243 or 252 | about $90 to $160 | roughly $0.50 to $0.90 |
| Silicone | APOC 576 | about $150 to $260 | roughly $1.00 to $1.80 |
Those are material-only figures for a DIY job. Hiring a contractor to prep and spray a full roof usually adds labor that can match or exceed the material cost, and a professional silicone restoration on a commercial roof often runs higher still. If you plan to hire out, our guide to vetting a roof coating contractor covers what a fair quote should include.
Is APOC roof coating any good, and where does it fall short?
APOC is a mainstream, widely stocked coating brand that performs well within the limits of its chemistry, which means results depend far more on surface prep and product match than on the label. Used correctly, an APOC acrylic or silicone coat can add years of waterproofing and cut cooling load on a white roof. Used on the wrong substrate or over a dirty surface, any coating brand peels.
- Strengths: easy retail availability, white reflective grades that can qualify for cool-roof energy programs, silicone that handles ponding, and clear warranty tiers from 7 years to limited lifetime.
- Limits: coatings restore a roof, they do not replace a failed one; they cannot bridge a wet or rotted deck; and silicone locks you into silicone-only re-coats later.
- Reality check: a coating is a maintenance step on a roof with life left, not a fix for a roof that is at the end of its service life. When the deck or membrane is failing, budget for replacement instead.
For a coating to earn its warranty, the manufacturer almost always requires documented prep and the matching primer, so keep receipts and photos. Whatever brand you choose, the coating is only as good as the surface under it.
Frequently asked questions
Is APOC roof coating any good?
APOC is a solid mainstream coating brand made by Gardner-Gibson, and within its chemistry limits it performs well. A correctly applied APOC acrylic or silicone coat can add years of waterproofing and reflectivity. The outcome depends mostly on matching the product to your roof surface and on thorough cleaning and priming, not on the brand name itself.
How long does APOC roof coating last?
Lifespan tracks the warranty tier and the prep. APOC 241 carries a 7-year limited warranty, APOC 243 a 10-year, premium acrylics like 252 reach the 15-year class, and APOC 576 silicone carries a limited lifetime warranty. Real-world service life often runs 10 to 20 years for silicone and acrylic when the roof is properly cleaned, primed, and re-coated on schedule.
How many coats of APOC do I need?
APOC recommends two thin coats for its acrylic and silicone roof coatings rather than one thick coat. Two coats cure more evenly, hide pinholes, and build the mil thickness the warranty assumes. Apply the second coat once the first is dry to the touch, ideally at a right angle to the first pass for full coverage.
How much does a gallon of APOC coating cover?
Plan on roughly 1 to 1.5 gallons per 100 square feet per coat for acrylic in a two-coat system, and about 1.5 gallons per 100 square feet for single-coat silicone. A 4.75-gallon pail covers about 380 square feet per coat at that rate. Rough or porous roofs use more, so confirm the exact rate on the product data sheet.
Can you apply APOC over shingles?
Coating asphalt shingles is possible but rarely worthwhile, because shingles shed water by overlap rather than by a monolithic seal, and coating can trap moisture. APOC coatings are designed for low-slope and flat roofs, metal, and aged membranes. For sloped shingle roofs, repair or replacement usually beats coating. See our take on spray-on coatings for shingles for the full reasoning.
What temperature do you apply APOC roof coating at?
Apply APOC coatings at 65 degrees F and rising, with several dry hours before dew or rain. Cure slows in cool or humid weather: temperatures below 80 degrees F or humidity above 50% can add up to 12 hours to full cure. Silicone grades like APOC 576 become rain-safe in about 15 minutes, but full cure still needs favorable conditions.
Reviewed by The Roofing Brief Team. Last reviewed July 2026.