If your Dicor 501 Self-Leveling Lap Sealant is bubbling or rippling after application, several factors could be causing this reaction. Here are the most common reasons:
1. Surface Temperature & Heat Expansion
Cause: Applying Dicor on a hot roof, especially in direct sunlight, can cause air or moisture trapped underneath to expand, leading to bubbling.
Solution: Apply sealant in the early morning or late afternoon when the roof is cooler.
2. Moisture or Contaminants Underneath
Cause: If the surface isn’t completely dry or has residual moisture, oil, or dirt, the sealant may not adhere properly, leading to ripples.
Solution: Clean and dry the surface thoroughly before application. Use isopropyl alcohol or an RV roof cleaner for best results.
3. Outgassing from Roof Material
Cause: Some RV roofing materials, like TPO and EPDM, can release gases when heated, which may get trapped under the fresh sealant.
Solution: Apply in cooler conditions and avoid applying too thick of a layer at once.
4. Overapplication or Thick Layering
Cause: Applying too much sealant at once can cause uneven curing, leading to rippling as it settles.
Solution: Use a steady, controlled bead of sealant and let it self-level naturally.
Is It a Problem?
Mild bubbling often settles as the sealant cures. However, if the bubbles remain after 48-72 hours, it may indicate poor adhesion, and you might need to remove and reapply.
Maintenance & Repair Article
Understanding RV Roof resealing
The products to reseal your RV roof
- Our favorite dripless caulking gun
- Our favorite scraper
- Our favorite scraper with handle
- Our favorite solvent cleaner
- Dicor self leveling sealant white
- Dicor Non-Sag lap sealant white
- Dicor Non-Sag lap sealant black
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- Tool bag collapsible roof safe soft surface
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