Frequently Asked Questions
The substrate and adhesion questions we field most often.
Substrates & When to Prime
Which substrates actually require priming?
TPO, EPDM, and other single-ply membranes — always. Galvanized, aluminum, and factory-finished metal panel — yes. Wood — yes, for adhesion and tannin blocking. Asphalt and bituminous — yes, for bleed-through. Concrete — recommended, and required if stained or previously coated. Freshly blasted steel at SP6 with a 2–4 mil profile is the main case where a primer is usually not needed.
Will it really bond polyurea to TPO and EPDM?
That is the primary reason the product exists, and it is what makes single-ply roof restoration possible without a tear-off. Membranes vary by manufacturer, formulation year, and how they have weathered, so run a test patch and pull test on any weathered membrane before mobilizing a crew. Ten minutes of testing is cheap.
Can I skip the primer on blasted steel?
Usually yes. A proper SSPC-SP6 commercial blast with a 2–4 mil angular profile gives polyurea both mechanical interlock and a clean, receptive surface, and pull-off adhesion runs above 500 PSI. Where blasting was not achievable and you are overcoating tight rust after SP3 power-tool cleaning, prime it.
What if nobody knows what coating is already on the surface?
That is a completely normal situation on older buildings. Wash it, abrade it, prime a test area, topcoat it with the actual product, cure it, and pull it. If it releases cleanly at the interface, stop and call us before you commit. Do not bid an unidentified substrate as if it were a known one.
Bleed-Through & Performance
What is bleed-through and why does it matter?
Mobile contaminants in the substrate — asphalt oils, plasticizers from old coatings, oil in a shop slab, tannins in wood, rust staining — migrate upward into a new coating and discolor it, often weeks after the job is finished. The coating is adhered perfectly and the customer is still unhappy. 7001 blocks that migration, which is why it is standard under any light-colored finish over a dark, oily, or previously coated surface.
How much coverage do I get?
It depends heavily on substrate porosity and texture — a smooth membrane consumes far less than an open shot-blasted slab. The technical data sheet gives the coverage rate; ask us and we will help estimate for your specific substrate and square footage rather than have you guess and come up short mid-roof.
How long do I have before I need to topcoat?
Topcoat within the recoat window stated on the technical data sheet — the product is quick-setting, which is what lets you prime and coat in the same mobilization. If you miss the window, abrade the primed surface and re-prime. Do not just spray over it and hope.
Does it work in cold weather?
Within the range on the data sheet, yes — but substrate temperature governs, not air temperature. A concrete slab or a metal deck lags ambient by hours, and dew point matters as much as temperature. Check the surface with an instrument rather than judging by how the morning feels.
Application, Ordering & Private Label
How is it applied?
By roller, brush, or sprayer depending on the surface and the area — no plural-component equipment is needed for the primer itself. On large roofs a sprayer is far faster; on details and transitions a brush gives you the control you want. Apply generously on porous or contaminated substrates and do not spot-prime where bleed-through is a risk.
Can I use it under another manufacturer's topcoat?
Tell us what you are planning to spray over it and we will give you an honest answer. It is formulated and tested under Oak Ridge coatings, and that is where we can stand behind the result. For other combinations, test it — and we will tell you if we think it is a bad idea.
Can I buy just the primer?
Yes. Plenty of contractors buy 7001 on its own because it solves a substrate problem they have and nothing else does. There is no requirement to buy the rest of the line, and we ship any quantity nationwide.
Is it available under my own brand?
Yes. WatchGuard is Oak Ridge's private-label brand and 7001 is available as WatchGuard Primer or under your own name, with the technical data sheet and safety data sheet included. Distributors like it because one multi-surface SKU replaces four substrate-specific ones on the shelf.
Substrate Question We Did Not Cover?
Describe what you are dealing with. You will get a straight answer, including "do not coat that" if that is the right one.
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