Polyurea roof coating · For contractors
Water gets into a seam, freezes and expands. By January that hairline crack is a ceiling stain. Seamless pure polyurea stays flexible through freeze-thaw, and you still have weeks to get it on.
Send 3 things, get a system quote the same business day:
OR 80SLM Silver Lining Membrane, from the technical data sheet
Why roofs fail in winter
Pure polyurea stretches to four times its length before it breaks, so it rides out the movement instead of splitting along it. It also sets in seconds, so you are not waiting on a warm dry day for it to cure.
| Pure polyurea OR 80SLM |
Epoxy | Water-based acrylic | |
|---|---|---|---|
| Flex through freeze-thaw | 400% elongation | Rigid, cracks with the deck | Elastomeric, but a thinner film |
| Cure | Tack-free in 10–20 seconds | Hours | Needs warm, dry weather; rain can wash it off |
| Late-season work | Chemical cure, short windows still work | Slows badly in the cold | Season ends early |
| Seams | None, one monolithic membrane | None | None |
| Sunlight | Aromatic grades can shift color; OR 42D aliphatic topcoat holds it | Chalks and yellows | Good UV resistance |
| Equipment | Plural-component rig, 1:1 at 160°F / 2,200 psi, or OR 60BM by brush for details | Roller or sprayer | Roller or airless |
Polyurea figures are from the OR 80SLM, OR 42D and OR 60BM data sheets. Epoxy and acrylic describe the product types in general; check the data sheet of any specific product you are comparing.
The roof system
Tell us the deck and we will match the primer and the mil thickness. Every product ships with its technical and safety data sheets.
Flagship roof membrane
100% solids, two-component pure polyurea for metal and built-up roofs, coating over urethane and EPS insulation, and pedestrian decks. Reflective, moisture tolerant, high-build.
Pure polyurea for buried or protected roof decks, with or without foam underneath, plus foundations, tanks and clarifiers. 80 sq ft/gal at 20 mils.
OR 811 penetrates concrete and porous decks. OR 7001 bonds to rolled roofing, wood and steel and works as a tie coat over an existing coating.
Pure polyurea by brush, roller or squeegee for curbs, terminations, penetrations and repairs. No rig to mobilize for the small stuff.
Color-stable polyurea for exposed work where the finish has to hold its color in the sun. Applies down to -20°F.
Polyurea sprays 1:1 at about 160°F and 2,200 psi. We are an authorized Graco distributor and sell Reactor proportioners, guns and heated hose, and we train crews.
Coverage estimate
Based on the data sheet rate of 80 sq ft per gallon at 20 mils, plus the waste allowance you choose. The quote confirms the final number once we have seen the deck.
A drum set is one 55-gal A drum plus one 55-gal B drum, 110 gal mixed at 1:1. Smaller jobs are quoted in kits.
On the roof
How it works
Size, deck type and a few photos, through the form or on the phone.
Membrane, primer, mil thickness and quantity, priced with freight to your ZIP, with the data sheets attached.
Most in-stock material ships within 1–2 business days, in kits or drums. No minimum on most in-stock items.
Questions contractors ask
Something not covered here? The people answering the phone know the chemistry.
800-625-9577Polyurea cures by chemical reaction, not evaporation, so it keeps working after acrylics are done for the season. The limit is usually the primer and the deck: OR 7001 primer needs the substrate above 40°F until it cures, and the deck has to be dry and frost-free. Send us the job location and timing and we will tell you what is realistic.
A 1:1 plural-component proportioner with heated hose, running at about 160°F and 2,200 psi, such as a Graco Reactor. For curbs, penetrations and repairs, OR 60BM goes on by brush or roller with no rig at all.
On most low-slope metal, built-up, single-ply, concrete and spray foam roofs, yes, with the right prep and primer. Steep-slope shingle roofs are usually not a good candidate. Photos let us tell you honestly before you buy anything.
Both. Drum sets for production work and kits for smaller roofs and detail work. The quote tells you which fits the job.
Most in-stock material ships within 1–2 business days from Green Lake, Wisconsin. There is no minimum on most in-stock items, and LTL or full truckloads are available for volume buyers.
Oak Ridge supplies materials and equipment rather than doing the application. Send the roof details anyway and we can point you to contractors who spray our systems.
Send the roof today and you will have a system and a price while there is still time to put it on.
