Self Leveling RV Sealants

10 products

White Dicor 501LSW-1 Self-Leveling RV Lap Sealant Tube - Front View | United RV Parts
$10.50 $14.99

Dicor | Self Leveling RV Lap Sealant | 501LSW-1 | White
Save $4.49 Ships Next Day-order by 1:00CT(M-F)
Tan Dicor 501LST-1 Self Leveling RV Lap Sealant Tube - Front View | United RV Parts
$10.50 $15.99

Dicor | Self Leveling RV Lap Sealant | 501LST-1 | Tan
Save $5.49 Ships Next Day-order by 1:00CT(M-F)
Dicor 501LSW White Self-Leveling RV Lap Sealant 25-Tube Case - Group View | United RV Parts
$249.99 $309.99

Dicor | Case of 25 Tube Self Leveling RV Lap Sealant | 501LSW-25 | White
Save $60.00 Ships Next Day-order by 1:00CT(M-F)

Self-leveling sealant does one job that regular lap sealant cannot. Poured onto a horizontal seam, it flows out and finds its own level, filling the gap around a vent flange or screw head without any tooling. That matters on a roof, where a hand-tooled bead leaves high spots and thin edges that crack first. On vertical surfaces it will simply run, which is why sidewall seams call for a non-leveling product instead.

We stock Dicor 501LS in white, tan, gray, ivory and black, with a 25-tube case if you are resealing a full roof. LaSalle Bristol XTRM comes in white and beige, Lippert Alpha Systems 1021 is a low VOC option, and Sikaflex 504 is semi-self leveling.

Confirm whether your roof is EPDM, TPO, or fiberglass before ordering, and match the new sealant to whatever is already on the roof.

What is self-leveling lap sealant for an RV roof?

Self-leveling lap sealant is a flowable sealant made for horizontal roof surfaces. After you lay a bead, it flows out and finds its own level, so it settles into seams and around fasteners without leaving the high spots a hand-tooled bead can leave. RV owners use it on roof edges, vents, skylights, antenna bases, and exposed screw heads, either for spot repairs or when resealing a full roof.

What is the difference between self-leveling and regular lap sealant?

Self-leveling lap sealant flows after application and is meant for flat or low-slope surfaces like the roof. Regular (non-sag) lap sealant holds its shape and stays where you put it, which makes it the right choice for vertical surfaces. If you are sealing a roof-mounted RV cable hatch, self-leveling sealant is the usual pick. On sidewall components, such as the frame around one of our 10 gallon RV water heaters, use a non-sag sealant, because a self-leveling product will run down the wall before it cures.

Will this RV roof sealant work on EPDM and TPO roofs?

Roof compatibility varies by product. Some lap sealants are formulated for EPDM rubber roofs, some for TPO, and some are labeled for both. Before ordering, confirm your roof membrane type in your RV owner's manual or with the manufacturer, then check the compatibility listed on the product page. Using the wrong sealant on a membrane can lead to poor adhesion and a reseal job you have to repeat.

Do I need to remove the old sealant before applying self-leveling caulk to my RV roof?

Usually, no. Most self-leveling lap sealants can go over existing compatible sealant once you prepare the area. Cut away any cracked, peeling, or loose material and clean the surface so it is free of dirt, oil, and chalky residue. Then let it dry completely before you apply a new bead. If the old sealant is a different chemistry or you cannot identify it, check the product label for guidance before you apply over it.

How much self-leveling RV sealant do I need, and when can I apply it?

Coverage depends on bead width and how many seams and fixtures you are sealing. A full roof reseal often takes several tubes, while a single vent or skylight may need only one. Plan your application for a dry day within the temperature range printed on the label, and leave time for the sealant to skin over before rain or heavy dew. Orders over $100 ship free. If you are unsure which sealant fits your roof, text or call 817-984-1852 with your RV make, model, and roof type, and our team will help you pick the right one.