Liquid Rubber RV Lap Sealant, White 4-Pack, Self-Leveling Waterproof Sealer

Liquid Rubber RV Lap Sealant is a white, self-leveling sealant for waterproofing horizontal RV roof details, supplied in a four-pack of 10 oz (283 g) tubes.

• Self-leveling formula — flows into place to form a smooth seal on horizontal roof details.
• Flexible, waterproof barrier — moves with temperature changes and road vibration to help prevent water intrusion.
• Made for vents, skylights, AC units, antenna mounts, and roof seams — addresses common RV roof details.
• Works with EPDM, TPO, fiberglass, metal, aluminum, PVC, and ABS when surfaces are properly prepared.
• Each tube covers approximately 22 linear feet (6.7 m) with a 5/16 inch (7.9 mm) bead — helps estimate material for a sealing project.

Roof penetrations and seams can let water into an RV if their seals fail. This lap sealant is designed for detail work on horizontal roof surfaces, where it can flow and level after application. It is not intended for vertical surfaces, sidewalls, or filling open gaps and cracks, so choosing it for the right roof area helps set up the application for success.

What RV roof areas is this sealant designed to seal?

Liquid Rubber RV Lap Sealant is made for horizontal roof details such as vents, skylights, AC units, antenna mounts, and roof seams. Its self-leveling behavior means the material flows as it is applied; that flow is normal and expected. Once in place, it forms a flexible waterproof barrier that moves with the RV through temperature changes and road vibration, helping prevent leaks and water intrusion.

• Use it for detail sealing on horizontal roof surfaces.
• Do not use it on vertical surfaces or sidewalls.
• It is not intended to fill open gaps or cracks.

Which RV roof materials can it bond to?

With proper surface preparation, Liquid Rubber RV Lap Sealant is compatible with EPDM, TPO, fiberglass, metal, aluminum, PVC, and ABS. Apply it only to clean, dry surfaces, and remove existing silicone completely before application because the sealant will not adhere to silicone. This product is intended for detail sealing; larger seams, movement areas, or a complete roof system call for pairing it with Liquid Rubber Seam Tape and Liquid Rubber RV Roof Coating.

• Clean and dry the surface before applying.
• Remove all existing silicone to prepare the surface.
• For larger seams or a full roof system, use the specified Liquid Rubber system products alongside it.

How much sealant does each tube cover, and how is it applied?

Each 10 oz tube covers approximately 22 linear feet (6.7 m) when applied as a 5/16 inch (7.9 mm) bead. A typical 30 ft RV (9.1 m) usually requires about four tubes, and this pack contains four. Apply the sealant with a standard caulking gun; after cutting the nozzle, puncture the inner seal before dispensing.

• Coverage varies with the specified bead size and application.
• Use a standard caulking gun for application.
• Cut the nozzle and puncture the inner seal before applying.

This four-tube pack suits RV owners sealing horizontal roof details on compatible, properly prepared surfaces. It is intended for detail sealing rather than vertical areas, open cracks, or a full roof coating on its own. For a typical 30 ft RV, the pack provides about the number of tubes usually needed for the stated application.