Dicor RV self-leveling lap sealant 10.3 oz Ivory — HAPS-free, flexible watertight seal for horizontal roofs

Dicor 501LSV-1 is a HAPS-free, self-leveling lap sealant formulated to create durable, flexible watertight seals on horizontal RV roof joints, vents, and fasteners.

This 10.3-ounce ivory cartridge is designed for rooftop maintenance and repair, offering broad adhesion across common roofing substrates including EPDM, TPO, and PVC membranes as well as metals, concrete, and wood. Its self-leveling formulation smooths out after application, producing a low-profile seal that resists cracking and discoloration from sunlight. Because it’s color-stable and non-staining, it blends with roof finishes without leaving marks on surrounding materials.

How does this sealant perform on horizontal roof surfaces?

The product flows to fill gaps and form a continuous bead that levels itself on flat areas, making it ideal for lap seams, screw heads, and around vent bases. It stays flexible after curing so it accommodates roof movement without splitting.

• Self-leveling chemistry reduces tooling and smoothing time
• Forms a continuous, gap-filling bead across horizontal seams
• Remains flexible to handle thermal expansion and vibration
• 10.3 oz cartridge fits standard caulking guns for controlled application

Will Dicor 501LSV-1 stick to my RV’s roof materials?

This lap sealant bonds to a wide range of common RV surfaces. It was engineered for EPDM but is compatible with many roofing membranes and rigid substrates, delivering strong adhesion for reliable sealing.

• Works with EPDM, PVC, and TPO roofing membranes
• Adheres to aluminum, galvanized metal, fiberglass, wood, mortar, and concrete
• Color-matched ivory minimizes visible repair marks
• Sun-ray stabilized to help prevent color change over time

Is this product user-friendly for DIY roof repairs?

Yes — the self-leveling formula simplifies application on flat surfaces and requires minimal finishing. Standard caulk guns dispense the 10.3-ounce tube, and the bead levels on its own, which speeds repairs and reduces the need for specialized tools.

• Requires common caulking gun — no specialty equipment
• Self-leveling reduces need for tooling or smoothing
• Ivory color provides a neat, finished appearance on most roofs
• HAPS-free formulation for fewer regulated air contaminants

How does it hold up against weather and aging?

The sealant is formulated to resist sunlight-induced fading and not to stain adjacent materials. Once cured it forms a resilient, flexible seal that tolerates environmental stresses experienced by mobile and stationary roofs.

• Sun-ray stabilization reduces discoloration and spotting
• Remains flexible to resist cracking from movement and temperature swings
• Non-staining formulation protects surrounding surfaces
• Designed for long-term rooftop maintenance use

Who is this for? Dicor 501LSV-1 is aimed at RV owners, fleet maintenance teams, and professional roof technicians who need a dependable, easy-to-apply lap sealant for horizontal sealing tasks. It suits anyone repairing or maintaining rooftop laps, fasteners, vents, and small penetrations on RVs and other vehicles, or for light commercial rooftop touch-ups where a sun-stable, flexible, non-staining seal is required.