Gaco manufactures silicone, acrylic, urethane, and foam roof coating systems built to seal, restore, and waterproof existing roofs without a full tear-off. The flagship GacoRoof 100% silicone coating requires no primer on most substrates, stays permanently flexible, and is rated to withstand permanent ponding water — a common failure point for lesser coatings. Available through Murphy’s Roofing Supply for restoration and recover jobs across flat and sloped roof types.
What Is Gaco and Why Restoration Contractors Use It
Gaco has built its name on silicone roof coating chemistry, and GacoRoof is the product most contractors know it for. It creates a seamless, monolithic membrane over an existing roof, sealing seams, flashing details, and minor deck imperfections without the cost and disruption of a full re-roof.
Unlike acrylic or urethane coatings, 100% silicone doesn't soften, bubble, or degrade under standing water, which makes it a strong fit for the flat and low-slope commercial roofs that collect water after storms — a scenario that comes up constantly across the Gulf South.
No Primer Needed
Adheres directly to built-up roofs, cap sheet, metal, modified bitumen, and sprayed polyurethane foam on most jobs, cutting a step out of the application process.
Ponding Water Rated
Stays flexible and holds adhesion under permanent ponding water or snow pack, where acrylic and asphalt coatings typically fail first.
UV & Weather Stable
Resists degradation from harsh UV exposure and temperature swings without becoming brittle over the life of the coating.
Product Lineup
Gaco organizes its roofing catalog by chemistry, which makes it easier to match the right product to the job and the budget:
- Silicone — GacoRoof, GacoFlex S20 / S2100 / S42, LiquidRoofTape, GacoPatch
- Acrylic — GacoFlex A47 / A48, AF4700 SeamSeal, A4121, 127 & 129 Series
- Roof Foam — GacoRoofFoam, GacoFlashFoam Kit for spray polyurethane foam roof systems
- Urethane — U91 Aromatic, U92 Aliphatic, UF90 GacoMastic, PU 300 Series
- Accessories — GacoPrime, GacoWash, WalkPad granules, colorants, and crack & joint sealants
Where It Fits on the Job
Gaco coatings are a recover play, not a replacement play. They're specified when a roof deck is sound but the surface is aging, leaking at seams, or ponding water — common on flat commercial buildings, mobile homes, RVs, and metal roofs across our service area. Contractors use GacoRoof and GacoFlex to extend roof life by years without the cost, disposal, and downtime of a tear-off.
Gaco offers multiple chemistries (silicone, acrylic, urethane, foam) and colors. Confirm the specific product line and quantity in stock at your branch with our counter team before finalizing a bid — products and suppliers vary by location.
FAQ
Does GacoRoof need a primer?
No primer is required on most common substrates, including built-up roofs, cap sheet, metal, modified bitumen, and sprayed polyurethane foam. Always check the specific substrate against the current product data sheet.
Can Gaco coatings handle standing water?
Yes. GacoRoof and the GacoFlex silicone line are rated to withstand permanent ponding water without softening, bubbling, or degrading, which is a common failure point for acrylic and asphalt-based coatings.
Is Gaco available at Murphy's Roofing Supply?
Yes. Gaco is one of Murphy's stocked manufacturer lines. Ask our counter team which specific coatings and package sizes are on hand at your branch.
