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Will the liquid rubber work on a horse trailer roof that is both fiberglass and metal?

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The roof at the front of the trailer is leaking at 3 or more of the seams.  The front seam is where the fiber glass and steel meet.  I've tried a sealant from an RV repair shop and also the as seen on tv flex seal.  Neither worked well, if at all.  I live in the mountains of Colorado so there are wide temperature fluctuations.  I want to insulate and put up walls inside the dressing area, but can't even leave a mattress inside because the roof leaks.  I keep it covered with a tarp when not in use.  What is the best material to seal and waterproof this roof that will last for a long time?  What kind of prep needs to be done?  Thank you.
asked May 11, 2015 in General by anonymous

1 Answer

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Sure the liquid roof can go directly over fiberglass and steel.  Here are the specific substrates and their limitations

Thank you



The following roof types-substrates do NOT require the ProFlex primer only one coat of the Liquid EPDM

  • Various Metal Roofing systems
    • Weathered Galvanized
    • Weathered Aluminum
    • Weathered Copper
  • Any original epdm rubber roofing system
  • Concrete where there is little foot traffic
  • Sprayed Urethane Foam
  • Fiberglass
  • PVC
  • Acrylic Sheet and any acrylic based products
  • Weathered Vinyl

The below roof types- substrates will require one coat of the ProFlex primer prior to application of Liquid EPDM Rubber

  • Built up asphalt roofs-You would first need to apply our ProFlex primer before applying the liquid EPDM.
  • Asphalt shingles-First needing our ProFlex primer
  • Modified asphalt roll roofing - First needing our ProFlex primer
  • Stainless steel-Only if sanded
  • Neither the primer or Liquid EPDM can be applied to glass
  • Silicone caulk-Any silicone caulk needs to be removed and replaced with either butyl or acrylic caulk
  • Heavily trafficked surfaces like decks or porches
  • Hypalon Membrane-ProFlex primer is required first
  • Wood applications that are first primed with our ProFlex primer
  • Any roof where a 3rd party coating such as an elastomeric or acrylic was previous applied
  • TPO
  • Polyurethane foam
answered May 11, 2015 by admin