The Waterproofing System
Three products, one envelope. Here is exactly what each one does and where it goes wrong when you skip a step.
Request the Application GuideStep One: Super Orange Cleaner
A camper roof arrives at the job with three things on it that will kill a coating bond: mold-release wax left from the fiberglass or membrane manufacturing process, a decade of road film and diesel soot, and the chalky residue of degrading rubber plasticizers.
Super Orange Cleaner removes all three. On a unit that has never been properly cleaned, plan on two full passes with a rinse in between. The test is simple — flood a section with water and watch it. If it sheets evenly, the surface is clean. If it beads anywhere, that spot still has wax on it and the coating will let go there first.
Let it dry completely. Not damp, not shaded-and-probably-fine. Dry.
Step Two: 7001 Primer
7001 is a quick-set multi-surface adhesion primer, and on a camper it is doing two jobs at once.
First, adhesion. Camper roofs are rarely one material — you have an EPDM or TPO membrane in the field, aluminum or steel flanges at every penetration, a fiberglass front cap, and often a wood or composite substrate at the edges. 7001 bonds to all of them, which means the finished membrane is continuous across material changes instead of stopping at each one.
Second, it blocks bleed-through. Old lap sealant, rubber plasticizers, and previous coatings will migrate up into a fresh membrane and discolor or soften it. 7001 seals that off.
Prime the field, then go back and prime flanges, seams, and terminations a second time. Those are the details that fail.
Alasta Seal — Typical Properties
| Property | Value |
|---|---|
| Solids by volume | 100% |
| Chemistry | Flexible polyurea elastomer |
| Elongation | 300 – 400% |
| Tensile strength | 2,500 – 3,000 PSI |
| Tear strength | 400 – 500 pli |
| Gel time | 3 – 6 seconds |
| Tack-free time | 10 – 30 seconds |
| Return to service | Same day |
| Service temperature | −40°F to 250°F |
| Roof deck DFT | 40 – 60 mil |
| Seam & flange DFT | 80 mil |
| Storage bay / vertical DFT | 30 – 40 mil |
| Coverage | 1,604 mil-sq-ft per gallon |
| Recoat window | Up to 6 hours with no re-prep |
| Equipment | Plural-component proportioner with heated hose |
Prep Notes by Roof Type
EPDM (black rubber): The most common camper roof and the one most sensitive to prep. Clean twice, verify the water-sheet test, and prime generously. EPDM sheds a chalky plasticizer layer that has to come off.
TPO (white membrane): Cleans up easier but is slicker. 7001 is not optional here.
Fiberglass caps and one-piece roofs: Scuff any gelcoat that is still glossy, then clean and prime. Mold-release wax is the failure mode.
Aluminum: Degrease, scuff the oxide layer, prime. Watch for dissimilar-metal corrosion at rivet lines and detail those heavier.
Previously coated roofs: If the old coating is soundly bonded, clean, scuff, and prime over it. If it peels when you pull at an edge, it all has to come off — a membrane is only as good as what it is stuck to.
Want the Full Application Guide?
We will send the TDS and SDS for all three products plus a step-by-step camper application guide with prep photos.
Request DocumentationGet a Camper Waterproofing Quote
Tell us about your project and we will follow up with product details, technical data sheets, and pricing.