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Non-returnable due to hazmat safety reasons
Non-returnable due to hazmat safety reasons
This item is non-returnable due to its composition that makes it regulated for transportation, but if the item arrives damaged or defective, you may request a refund or replacement.
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Returns
Non-returnable due to hazmat safety reasons
This item is non-returnable due to its composition that makes it regulated for transportation, but if the item arrives damaged or defective, you may request a refund or replacement.
Read full return policy
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Dicor 501LSW-1 HAPS-Free Self-Leveling Lap Sealant for horizontal surfaces - 10.3 Oz, White, Secure, Ideal for RV Roofing, Maintenance, Repair, Appliance Application

4.7 4.7 out of 5 stars 19,268 ratings
#1 Best Seller in RV Sealants
$12.99
White
Self-Leveling
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Purchase options and add-ons

Color White
Brand Dicor
Item Weight 12.8 Ounces
Liquid Volume 10
Item Form Liquid

About this item

  • RV ROOFING USE: Lap sealant is sun-ray stabilized to avoid spoiling and discoloration; Plus, it will not stain or discolor any roofing material to which it is applied
  • COLOR: White hue for stylish and beautiful RV roof
  • EASY TO USE: Self-leveling for smooth application to RV roofing on horizontal surfaces
  • SIZE: 10.3 oz. tube
  • COMPATIBILITY: Works with EPDM, TPO and PVC membranes, it adheres firmly to aluminum, mortar, wood, vinyl, galvanized metal, fiberglass, and concrete
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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 11.25 x 2 x 2 inches; 12.8 ounces
  • Item model number ‏ : ‎ 501LSW-1
  • Batteries ‏ : ‎ 1 Unknown batteries required.
  • Date First Available ‏ : ‎ August 28, 2008
  • Manufacturer ‏ : ‎ Dicor
  • ASIN ‏ : ‎ B000BRF7QE
  • Customer Reviews:
    4.7 4.7 out of 5 stars 19,268 ratings

Product Description

Dicor’s Self-Leveling Lap Sealant creates a watertight seal along a roof's edges, air vents, vent pipes, and screw heads. This lap sealant is a versatile sealant formulated for EPDM roofing but also compatible with most other roofing material, including Dicor DiFlex II, Tufflex PVC, and BriTEK TPO roofing. It offers excellent adhesion to aluminum, mortar, wood, vinyl, galvanized metal and concrete. Continuously seals and remains flexible. Color matched, our lap sealants are sun-ray stabilized to avoid discoloration and spoiling and will not stain or discolor any material to which it is applied. HAPS-free.

Important information

Legal Disclaimer

Warning: Product may contain materials cautioned by California Proposition 65

Top Brand: Dicor

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From the manufacturer

lap sealant
lap sealant
Lap Sealant
dicor products

What's in the box

  • Tube

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    Customer reviews

    4.7 out of 5 stars
    4.7 out of 5
    19,268 global ratings

    Customers say

    Customers like the ease of use of the caulk. They say it's self-leveling and tacks up quickly. They also appreciate the water tight seal it creates. However, some customers have mixed opinions on cleanliness, quality, adhesion, and value.

    AI-generated from the text of customer reviews

    683 customers mention670 positive13 negative

    Customers are satisfied with the performance of the caulk. They mention that it works great and prevents water from coming in through the opening of their roof vents and ceiling fans. Some say that the product is OK and works great on things like roof venting and where ceiling fans protrude from the roof. Overall, most are happy with the product's performance and recommend it to others.

    "...Good stuff. Never a leak. Always works. Just put over 100 holes in the roof of my van. None of them leak!It rains a lot here so I would know...." Read more

    "This is a great product for use on RV roofs. Easy to use and very effective. I gave it a 4 due to the fact it arrived damage...." Read more

    "works great, good value" Read more

    "...It's easy to use and I think it does a good job. It takes a bit for it to set up but it bonds well to the roof membrane." Read more

    363 customers mention304 positive59 negative

    Customers like the sealant. They say it creates a watertight seal, and works well for sealing camper vents and seams on the roof. Some mention that the sealer never lasts forever, and is great for sealing around skylight screws.

    "...So far the seal is holding up very well. It hasn't leaked yet. Time will tell how well this sealants holds up to the elements." Read more

    "Used to seal my fan, solar panels and any holes I make. Good stuff. Never a leak. Always works. Just put over 100 holes in the roof of my van...." Read more

    "Easy to apply and sealed as expected." Read more

    "...Good consistency, levels nicely. So far no leaks." Read more

    251 customers mention231 positive20 negative

    Customers find the application of the caulk to be easy. They say it starts to set up pretty quick, and is self-filling. They also mention that the sealant is easy to work with and self-adhesive.

    "Used this to re-seal some window seals on our RV. It is easy to work with, the trick is to use a wet finger to smooth out a bead...." Read more

    "Easy to install but a bit pricey. Make sure you clean the surface well before applyingfor best results." Read more

    "This is a great product for use on RV roofs. Easy to use and very effective. I gave it a 4 due to the fact it arrived damage...." Read more

    "...It is easy to use and cures after several days, remaining soft and pliable." Read more

    131 customers mention101 positive30 negative

    Customers like the leveling of the caulk. For example, they say it fills in little gaps on its own and doesn't leave big lumps. Some mention that it's easy to work with and levels out very nicely when applied. That said, some say it'll dispense and level better when warmed up first.

    "Used for a roof fan install in my campervan. Good consistency, levels nicely. So far no leaks." Read more

    "Self leveling, sealed very well." Read more

    "Excellent self leveling Caulk. Has fixed many leaks over the years. The price is hefty but I'm willing to pay for the quality...." Read more

    "This is from the same name brand (Dicor) but not "self levelling". Used for sides where you don't want run-off...." Read more

    82 customers mention57 positive25 negative

    Customers are mixed about the adhesion of the sealant. Some mention it levels out insanely well and adheres great, while others say it sticks big time making a huge mess.

    "Used this to seal a seam on the roof of my RV. It flows easy and adheres well. Hopefully it is durable." Read more

    "This is great stuff for allowing flexing of RV roof. Sticks very good. Cure time is really nice...." Read more

    "...once cured--matte, not glossy--and it has a very slight tendency to sag on vertical surfaces, nothing really objectionable and it helps to reduce..." Read more

    "...Self Leveling, great adhesion. Use around all your vents, plumbing penetrations, etc.." Read more

    268 customers mention114 positive154 negative

    Customers are mixed about the quality of the caulk. Some mention that it holds up great in high wind and rain, is reliable, and easy to use. However, others say that they received a broken tube, nozzles that were bent, and the dispensing tube was bent.

    "...Easy to use and very effective. I gave it a 4 due to the fact it arrived damage. The entire dispenser tip was broken away from the tube...." Read more

    "...It is easy to use and cures after several days, remaining soft and pliable." Read more

    "...Once you’re used it it’s easy to apply. Do not tape off! Only complaint is longevity...." Read more

    "Works great...top quality..." Read more

    142 customers mention71 positive71 negative

    Customers are mixed about the value of the caulk. Some mention it's a good item and price, while others say it'd be better off going to hardware. They also mention that it can dry out and become useless.

    "works great, good value" Read more

    "Easy to install but a bit pricey. Make sure you clean the surface well before applyingfor best results." Read more

    "...Having said that I believe it’s the best bang for the buck and will continue to use it." Read more

    "...Has fixed many leaks over the years. The price is hefty but I'm willing to pay for the quality. I dare you to find something better." Read more

    61 customers mention20 positive41 negative

    Customers are mixed about the cleanliness of the caulk. Some mention it's easy to clean up, while others say it can be messy.

    "...I was still able to use it, but it was a little messy. I am sure this was an isolated incident and I will definitely not hesitate to order again." Read more

    "...seals everything very well, but remains flexible, and also relatively easy to scrape-off and reapply...." Read more

    "The only downfall is that it is really messy but works as it should.Take your time and use painters' tape, it really helps." Read more

    "...Works as advertised. Just wear vinyl gloves. It can be messy." Read more

    Dicor all the things
    5 Stars
    Dicor all the things
    Used to seal my fan, solar panels and any holes I make. Good stuff. Never a leak. Always works. Just put over 100 holes in the roof of my van. None of them leak!It rains a lot here so I would know. Just be careful and apply with at least 24 time to dry. Then you can let it get rained on.
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    Top reviews from the United States

    A. Biermans
    5.0 out of 5 stars Works well
    Reviewed in the United States on March 9, 2024
    Color: BlackStyle: Self-LevelingVerified Purchase
    Used this to re-seal some window seals on our RV. It is easy to work with, the trick is to use a wet finger to smooth out a bead. It is workable long enough to give you time to get the stuff were you want it. So far the seal is holding up very well. It hasn't leaked yet. Time will tell how well this sealants holds up to the elements.
    One person found this helpful
    Helpful
     Report
    casey
    5.0 out of 5 stars Dicor all the things
    Reviewed in the United States on April 4, 2024
    Color: WhiteStyle: Self-LevelingVerified Purchase
    Used to seal my fan, solar panels and any holes I make. Good stuff. Never a leak. Always works. Just put over 100 holes in the roof of my van. None of them leak!
    It rains a lot here so I would know. Just be careful and apply with at least 24 time to dry. Then you can let it get rained on.
    Customer image
    casey
    5.0 out of 5 stars Dicor all the things
    Reviewed in the United States on April 4, 2024
    Used to seal my fan, solar panels and any holes I make. Good stuff. Never a leak. Always works. Just put over 100 holes in the roof of my van. None of them leak!
    It rains a lot here so I would know. Just be careful and apply with at least 24 time to dry. Then you can let it get rained on.
    Images in this review
    Customer image
    Customer image
    3 people found this helpful
    Helpful
     Report
    Jeremy Henry
    5.0 out of 5 stars Best way to seal solar mounts
    Reviewed in the United States on May 4, 2024
    Color: WhiteStyle: Self-LevelingVerified Purchase
    The way this item sets is incredible. Creates firm, tight, smooth coating over allied areas.

    I use nothing other than this for the final touches of a panel doesn't install. 👍👍👍
    Helpful
     Report
    Erik
    4.0 out of 5 stars Great Product
    Reviewed in the United States on October 6, 2023
    Color: WhiteStyle: Non-LevelingVerified Purchase
    This is a great product for use on RV roofs. Easy to use and very effective. I gave it a 4 due to the fact it arrived damage. The entire dispenser tip was broken away from the tube. I was still able to use it, but it was a little messy. I am sure this was an isolated incident and I will definitely not hesitate to order again.
    2 people found this helpful
    Helpful
     Report
    John c
    5.0 out of 5 stars Works well
    Reviewed in the United States on March 28, 2024
    Color: WhiteStyle: Self-LevelingVerified Purchase
    Easy to install but a bit pricey. Make sure you clean the surface well before applyingfor best results.
    One person found this helpful
    Helpful
     Report
    Larry T. Parker
    5.0 out of 5 stars self leveling sealant
    Reviewed in the United States on April 26, 2024
    Color: GreyStyle: Self-LevelingVerified Purchase
    works great, good value
    Helpful
     Report
    M
    5.0 out of 5 stars Good Stuff
    Reviewed in the United States on March 17, 2024
    Color: WhiteStyle: Self-LevelingVerified Purchase
    I like this product for my RV roof. It's easy to use and I think it does a good job. It takes a bit for it to set up but it bonds well to the roof membrane.
    One person found this helpful
    Helpful
     Report
    Stefano-S
    5.0 out of 5 stars Seals well and the self levelling effect is excellent
    Reviewed in the United States on March 31, 2024
    Color: GreyStyle: Self-LevelingVerified Purchase
    I recently used three tubes of this product to reseal the skylights and other devices on the roof of my Lance travel trailer. It is easy to use and cures after several days, remaining soft and pliable.
    One person found this helpful
    Helpful
     Report

    Top reviews from other countries

    Translate all reviews to English
    John
    5.0 out of 5 stars Great adhesion
    Reviewed in Canada on November 3, 2023
    Color: WhiteStyle: Non-LevelingVerified Purchase
    Used this on my RV roof to seal areas where I screwed in the mounts for my solar panel installation. Works well.
    Report
    Robert
    5.0 out of 5 stars Good stuff
    Reviewed in Canada on September 24, 2023
    Color: WhiteStyle: Self-LevelingVerified Purchase
    I used the sealer on the new King antenna that I installed on my motor home. Works great and this is what you should be using if you are sealing something that you want to keep water tight. I have used this product several other times on other equipment that I own but if you check you will probable find it at a little better price.
    One person found this helpful
     Report
    David
    5.0 out of 5 stars Good
    Reviewed in Canada on August 12, 2023
    Color: Dove (Bright White)Style: Self-LevelingVerified Purchase
    Good
    Report
    Simaro
    4.0 out of 5 stars Grey?
    Reviewed in Canada on July 26, 2023
    Color: GreyStyle: Self-LevelingVerified Purchase
    People who use Dicor know the good quality of this product. The only reason i don't give 5 stars is because the color, it say grey. I was expecting at lease,.. a medium grey but this prooduct it's more of a very light grey, you will have a greater contrast over medium grey than over white.
    Report
    Alain hebert
    5.0 out of 5 stars Bon produit
    Reviewed in Canada on June 19, 2022
    Color: BlackStyle: Self-LevelingVerified Purchase
    Très bon scellant pour les t’oit et surface plate très liquide ce place tout seul un peux dispendieux mais efficace.
    Report