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Alpha Systems 1021 Self-Leveling Sealant for RVs - White - 10.3 oz - Qty 1
Alpha Systems

Alpha Systems 1021 Self-Leveling Sealant for RVs - White - 10.3 oz - Qty 1

Part Number: AL98KV
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RV Roof Repair
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Seal the skylights, vents, and other horizontal surfaces of your RV roof with this self-leveling sealant. Strong, weather-resistant formula works with rubber, metal, and fiberglass. Sealant has a longer lifespan and remains flexible for RV travel. Great Prices for the best rv roof repair from Alpha Systems. Alpha Systems 1021 Self-Leveling Sealant for RVs - White - 10.3 oz - Qty 1 part number AL98KV can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (251)
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Alpha Systems RV Roof Repair - AL98KV

  • Sealant
  • White
  • Self-Leveling
  • Alpha Systems
  • 10.3 oz

Seal the skylights, vents, and other horizontal surfaces of your RV roof with this self-leveling sealant. Strong, weather-resistant formula works with rubber, metal, and fiberglass. Sealant has a longer lifespan and remains flexible for RV travel.


  • Self-leveling sealant seals the roof membrane edges, skylights, vents, and other horizontal surfaces of your RV
    • Adheres to rubber, metal, and fiberglass
    • Self-leveling settles for a low-profile seam
  • Rubber-based formula provides a weather-resistant, flexible seal
    • High solid concentration for a longer lifespan
    • Low VOC means less air pollution
    • Remains flexible for the movement of RV travel
  • Longer dry time is best for fine touches and proper tooling - 48 hours, then ready for the road
    • Applies with a standard caulking gun
    • Can be painted once cured
  • White color matches your RV
  • Made in the USA


  • Coverage: 30' at 1/4" bead
  • Raw material base: butyl rubber
  • Viscosity: 80,000 - 200,000 centipoise
  • Solids: 77%
  • VOC content: 293 grams per liter
  • Application temperature range: 5 F - 120 F
  • Shelf life: 12 months
  • Quantity: (1) 10.3 oz tube

Note: This product contains heptane. Keep away from sparks, heat, and open flame. Overexposure can cause nausea.

RV Sealant - Non-Sag vs Self-Leveling

The kind of sealant you apply to your RV is important. To determine the type of sealant you need for your application, you will want to consider what it is you are sealing and where it is on your RV.

Self-leveling sealant is designed to level out as you apply it. The thick liquid slowly flows into a level position as gravity takes effect. This is particularly useful when sealing flat surfaces, like around a roof vent, AC, or skylight. As you apply the sealant, gravity will cause it to settle into an even line, giving you a clean, low-profile look.

Non-sag sealant is designed to retain its shape as you apply it. The consistency of the liquid is thick but malleable enough to be easily applied without causing sagging or slumping. This is useful when sealing vertical surfaces, such as the edges of a wall, window, or vent. As you apply the sealant, it will harden just enough to keep the liquid from drooping, giving you a clean, even look.

862144 Alpha Systems Self-Leveling Sealant 1021 - Low VOC - White - 10.3 oz

Customer Satisfaction Score:

Customer Reviews

Alpha Systems 1021 Self-Leveling Sealant for RVs - White - 10.3 oz - Qty 1 - AL98KV

Average Customer Rating:  4.7 out of 5 stars   (251 Customer Reviews)

Seal the skylights, vents, and other horizontal surfaces of your RV roof with this self-leveling sealant. Strong, weather-resistant formula works with rubber, metal, and fiberglass. Sealant has a longer lifespan and remains flexible for RV travel.


More importantly, etrailer knows how to ship their products. Ordered the same item on Amazon (3rd party reseller) and it arrived with the spout broken due to poor packaging. etrailer carefully packaged the tube to prevent damage.


The Alpha product is the only product that Keystone Cougar RVs approve of for the rook material covering their rv products. It’s great to know that eTrailer has what I need at a fair price and ships quickly too. Plus expert help is always there for the asking. Well done!


Used this to finish sealing the brackets on my solar panel installation... I used Butyl tape also. Works great. Highly recommend.


Used less than half a tube to cover some drying checks in the original caulk. Applied easily, seems to have adhered well to the old caulk. I'm not sure about the self-leveling but I'm told it takes time.

Robert S.


Seems to be holding up very well

Etrailer Expert

Mike L.


@RobertS We're happy to hear that, thank you!


That’s 5 stars for excellent and easy installation took all of 15 min. Used old screws from my old vent. Now my R.V. Looks new again. The sealant was fast and dried in about 4min. Work fast.


Good product and works great.


Had an RV Tech come out to do annual inspection of the roof on our 5th wheel. He found a couple areas of concern. Thank goodness I had a tube of this on hand so he was able to fix it right up and we are good to travel now. Highly recommend this product.


Delivery of my items was not what Inwas told when I ordered them, Should have gone with [online].
I know you won’t post this but you should.


Worked perfect on my 2013 Open Range bunk house


this is an awesome product and the self-leveling works superwell


Easy to use and worked well for my proj ect.


Worked as listed…. Shipping quick… doesn’t go as far as you might think


Will be applying the self-leveling sealant in the not too distant future. I have complete confidence it will work as advertised.


Best for TPO roofing.


Worked as is said


Easy to work with, and everything in a timely manner.


Easy to install with etrailer's instructional video. Still love it a year later.


We haven't used it yet, but delivery time was great.

by: 09/03/2022

We used it to seal over brackets used in installing a solar panel on the roof of our trailer. Works as it is supposed to. The self-leveling forms a kind of pool of sealant around the site. We also used butyl tape under the brackets first to seal the screw holes, then this sealant over the whole bracket.


Arrived on time, was as expected.


Parts were very good, you do need to update your website on expected delivery, parts came a week later that estimated when ordered and I paid for extra for 2 day shipping, just made another order and now not expecting until 4-25 when estimated arrival on website when ordered said 19th, products are very good just need to fix expected date when ordering.

Etrailer Expert

Brooke M.


Thank you for reaching out about this. I have sent your information along to our customer service team.


Good stuff. Hoping it lasts a long time.


I give it 5 stars only because I never had the chance to use them I bought a Lemon of a trailer. Finally was able to sell it. Not fair of me to review any lower due to someone else ripping me off.


Had a small leak at the skylight in the bathroom in our 5th wheel. This was just what I needed to fix the problem.


The material was only partially Self-leveling I was somewhat disappointed with the product.

Show More Reviews

See what our Experts say about this Alpha Systems RV Roof Repair

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