Liquid Rubber RV Lap Sealant – Self-Leveling Roof Sealant (2 Pack)

Overview

Liquid Rubber RV Lap Sealant is a ready-to-use, self-leveling sealant designed for the topside details that define most RV roofs—vents, skylights, AC units, and seams. When applied to clean, dry horizontal surfaces, it flows and settles into a smooth, continuous barrier that helps keep moisture out without forming ridges or gaps. This flow-by-design behavior aims to deliver an even bead around flat roof features, reducing the need for aggressive smoothing during application.

Why this sealant fits a complete roof system

As a detail sealant, it shines when paired with other Liquid Rubber products. For larger movement areas or full roof coverage, you can add Liquid Rubber Seam Tape and Liquid Rubber RV Roof Coating to build a cohesive, flexible roof system. The combination supports movement from temperature swings and road vibration, helping the roof stay watertight over time.

Key benefits you may notice

• Self-leveling action helps produce a clean, uniform seal around vents and seams, reducing manual smoothing.
• Flexibility supports ongoing movement, helping the roof breathe with temperature changes while resisting cracking.
• Waterproof performance aims to curb water intrusion at horizontal details, a common leak point for RV roofs.
• Compatibility with common roof materials means you can prep surfaces like EPDM, TPO, fiberglass, aluminum, PVC, and ABS with proper prep.

What you need to know before applying

• Surface prep is essential: apply only to clean, dry surfaces and remove any existing silicone completely.
• Not designed for vertical surfaces, sidewalls, or filling large gaps—use as a detail seal around horizontal features.
• Application method: use a standard caulking gun; cut the nozzle to your bead size and puncture the inner seal before use.

Tips for planning and coverage

Each 10 oz tube covers about 22 linear feet at a 5/16 inch bead, so plan your tube count based on your RV length. A typical 30 ft coach usually needs around four tubes, depending on the number of vents and seams you seal. If you see a brief flow as you apply, that is normal and part of the leveling process.

Practical considerations and care

Store tubes upright and away from extreme heat. If you’re coordinating with a full roof system, pace application to match other components and allow proper cure time per product guidelines. Always consider local weather and surface prep to ensure a durable finish.