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  1. RV Roof Repair
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  6. 10.3 Oz
Alpha Systems 1021 Self-Leveling Sealant for RVs - White - 10.3 oz - Qty 1

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

Item # AL98KV
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RV Roof Repair
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AL98KV - 10.3 Oz Alpha Systems 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. Lowest 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 1-833-496-1390 for expert service.
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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 Reviews

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

Average Customer Rating:  4.8 out of 5 stars   (114 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.


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


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.

Thank you for reaching out about this. I have sent your information along to our customer service team.
-- Etrailer Expert Brooke M - 04/25/2022


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.

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.


Same issue as #1 item (shipping damage), but promptly corrected!
Excellent service!


Works like a charm...follow the instructions and let it cure as required and you’ll get optimal results!


worked very well


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


holding just fine,made thru a brutal winter with no issues


great service, fast and accuarate!


Easy to apply and protecting as expected


This stopped my roof leaks and sealed it up. No leaks for over a year....


Good product. Went on easy, sealed well, and so far is holding up well.


Also received a little beat-up but not a problem. Have not used yet


works well as it should.


Works good

Keith - 11/11/2021


Great customer service and quick shippi ng


Did not level as well as expected.


Product worked well but think it should have been included in the solar kit. Thanks


good customerservice


Quick, easy


Product flowed great without running from where put.


Its still like new after a year in the Az sun, I have also used it to cover some spots that werent done very well from the factory.
James - 04/01/2022



Show More Reviews

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

  • Can You Add More Self-Leveling Sealant To Cured Self-Leveling Sealant
    Since you're adding more you'll want to wait for it fully cure and then wipe it down to ensure the surface is clean for the new sealant # AL98KV you'll be laying down to properly bond to the surface.
    view full answer...
  • Difference Between The Alpha Systems 1021 and 5121 Self-Leveling Sealants
    Both the Alpha Systems 1021 Self-Leveling Sealant for RVs - White - 10.3oz - Qty 1 # AL98KV and the Alpha Systems AlphaThane 5121 Self-Leveling Sealant for RVs - Gray - 9.8oz - Qty 1 # AL45KV are good for use on TPO roofing and will allow you to re-caulk your roof accessories for a water tight seal. The only difference between these two sealants is that the 5121 has a longer drying time which will allow you more time to get it exactly how you want. Also, the # AL45KV is gray while the AL98KV...
    view full answer...
  • Roof Sealant For TPO Roof
    Alpha # AL28KV (1010) is a non-sag sealant good for verticle surfaces, like sidewalls and end rails. Alpha # AL98KV (1021) is a self leveling sealant good for flat horizontal surfaces. Good around skylights and vents. Alpha # AL45KV (5121) is also self leveling, but in a gray color. Any of these can be used on your TPO roof.
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  • Recommended Repair For Staples That Poke Through RV Roof
    You could remove the roof to fix the staples but that would require a ton of work and can be costly, which is why Alpha said it would be overkill. You could just hammer the staples back down and just use some self leveling sealant like the Alpha Systems 1021 Self-Leveling Sealant for RVs - White - 10.3oz - Qty 1 # AL98KV to cover the holes for a watertight seal.
    view full answer...
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  • Recommended Butyl Tape And Sealant For Installing A MaxxAir RV Roof Vent
    I recommend the Alpha Systems Butyl Tape for RV Weatherproofing # AL28FJ as it's 1" wide to fully cover the flange of your vent. Make sure you overlap the ends to form a tight waterproof seal. You can see me doing this at 2:50 mark in the attached video below. As for the sealant, I recommend the Alpha Systems 1021 Self-Leveling Sealant for RVs # AL98KV. One tube of this will be enough to fully cover the screws and layer it down to the roof to ensure you don't have a water leak.
    view full answer...
  • Replacement Ladder Solution for 2007 Gulfstream 6316dk Conquest
    I have a solution for you, but it's unlikely that we will have a model that will precisely line up with your existing factory drilled holes that secure the ladder to your coach; all of the ladders we carry are going to be "universal" type applications that are designed to fit a variety of different coaches. If the holes don't line up, you would simply want to use some Alpha Systems Self-Leveling Sealant 1021 - Low VOC - White - 10.3 oz Item # AL98KV to plug any holes that are not used. With...
    view full answer...
  • Can An Acopower Solar Panel Be Connected To A Go Power Solar System
    Go Power uses MC4 connectors like part # 34279532 for their solar panel connections. You would not be able to mix your two panels together and run them through the Go Power Solar Controller. You would need to use additional Go Power branded panels like the # 34282181 to add on to your solar power system. The Acopower panel can still be ran to your battery separately though if that's what you're wanting to do. You would just need to drill a new hole in the run and run the wire from the...
    view full answer...
  • Replacement Antenna For Voyager WVOS511 Wireless Camera
    For your Voyager (DISCONTINUED) WVOS541 WiSight Wireless Backup Camera System, which includes the Voyager # WVH100 Observation Camera, the stock replacement antenna has been discontinued. You can usE the antenna from the antenna extension kit. If you are having reception issues you might consider the Voyager # WVOSAPANTEXT. This kit will allow you to place your antenna 10 foot closer to the monitor receiver and hopefully improve reception. The bracket for this antenna mount will screw...
    view full answer...
  • What is the Best Caulk for my RV?
    There are going to be two options for best caulk or sealant for your RV and it is going to depend on where your are using it. If you are on your roof you will want a self leveling sealant like the Alpha Systems 1021 Self-Leveling Sealant for RVs - White - 10.3 oz - Qty 1 item # AL98KV. This sealant can be used on skylights, vents, and other horizontal surfaces of your RV roof. The strong, weather-resistant formula works with rubber, metal, and fiberglass. It is a rubber based formula which...
    view full answer...
  • 100W Solar Panel Expansion Kit Installation Details and Recommended Sealants
    The hardware with the Go Power Retreat Expansion Kit part # 34272634 work out great for wood as most of the RV roofs now days are wood with a rubber overlay. When mounting the panels the Alpha Systems Q130 Butyl Tape part # AL33FJ and the Alpha Systems Self-Leveling Sealant 1021 part # AL98KV will do a great job of keeping any moisture out. The panels will match very closely to the height of your current panels so it will remain very consistent.
    view full answer...
  • Recommended GoPower Solar Flex 200 Watt System for 2018 Glacier Peak
    The Go Power Solar Flex Charging System with Digital Solar Controller - 200 Watt Solar Panels # 34272628 is what you need. The Go Power Solar Cable Entry Plate with Red and Black MC4 Cables - 7' Long # 34276245 will then be a replacement connection panel for your RV. You can use the Alpha Systems Self-Leveling Sealant 1021 - Low VOC - White - 10.3 oz # AL98KV to seal the connections to make them water tight.
    view full answer...
  • Can You Apply New Sealant to a Roof Directly Over Old Sealant & Removal of Old Sealant
    If the old sealant only has minor cracks you can use a sealant like the LaSalle Bristol XTRM Universal Self-Leveling Sealant # 34427034145-1 which is a little easier to work with than the Alpha Systems 1021 Self-Leveling Sealant for RVs # AL98KV. You need to keep in mind that adding sealant over sealant is just a quick fix and most likely temporary. You are better off getting the old sealant off and then applying the new sealant. Getting the old sealant off isn't incredibly difficult,...
    view full answer...
  • Recommended Roof Vent Cover For A Fan-Tastic Roof Vent
    Other branded covers will require you to drill into the side of your Fan-Tastic Vent Roof Vent w/ 12V Fan and Thermostat # FV803350 to install the mounting hardware. The Fan-Tastic Vent Ultra Breeze Trailer Roof Vent Cover # FVU1500BL won't require you to drill any new holes to install. You'll just need to pull out two screws on the sides on the vent and then shoot them back in with the mounting brackets on them. After that you'll just want to cover the screws and mounting brackets with...
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  • High Volume Roof Fan and Vent Cover
    Since you want to move a lot of air and you want a cover for your fan I recommend the MaxxFan # MA00-06401K that combines both the fan and cover in one product. The cover design is probably the best for keeping rain out. I think this full size fan will probably more more air than the low-profile "mini" that you mentioned. When you remove your old fan and install this one, use the Alpha Systems # AL48FJ butyl tape between the new fan and the roof, then the Alpha Systems # AL98KV Self-Leveling...
    view full answer...
  • How To Wire Go Power ECO And Eclipse Solar Power Systems On A 2022 Newmar Bay Star 3626
    The Go Power Eco Solar Charging System with Digital Solar Controller # 34273837 and Go Power Rigid Eclipse Solar Charging System with MPPT Solar Controller # GP97MR you referenced both will be wired directly from their controllers to the battery bank and will not be wired to an inverter first. Your inverter will be wired in as it's own system and not intertwined with these solar panel kits. As for the installation difficulty, if you're already prewired for this brand of solar systems...
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  • Difference Between The Lippert 360 RV Siphon Vents # LC389381 And # LC389380
    The Lippert 360 Siphon RV Vent Cap for Black Water Holding Tanks # LC389380 and # LC389381 are the exact same thing, just different colors. If you plan on replacing your siphon vent(s) then you'll also want to use some butyl tape # AL33FJ and some self-leveling sealant # AL98KV to ensure a watertight seal.
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  • Roof Vent Compatibility With A 1999 Trail Magic Horse Trailer
    Based on your picture I do not believe you measured wrong and that you do have a 13"x13" roof vent, which is uncommon but with the age of your trailer not unheard of. You could install the Ventline Ventadome Trailer Roof Vent - Manual - 14-1/4" x 14-1/4" - White - Birch Trim # V2092SP-25 you referenced but will most likely need to trim the opening a bit to get it to fit, or any other vent for that matter. You'll also need some butyl tape # CAM25013 and some self-leveling sealant # AL98KV...
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  • Correct Mounting Brackets For The Furrion Rooftop Solar Panels # FR73SR
    Yes, the Universal Z-Mount Bracket Kit for Furrion Rooftop Solar Panels # FR44PR (C-FSFP16MW-A02) is the correct mounting bracket to mount your Furrion Solar Panel - Rigid - 165 Watts - 59" x 26-5/8" # FR73SR to the roof of your RV. It includes all necessary bolts and washers for complete installation but I still recommend using some self-leveling sealant like # AL98KV over the screws to ensure a water tight seal with your RV.
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  • Roof Sealant for MaxxFan Install Plus Roof Vent Cover
    To seal around your new roof fan I would use the Alpha Systems # AL98KV Self-Leveling Sealant. To cover a MaxxFan I would use the MaxxAir # MA00-955002 in black or the # MA00-955001 in white roof vent covers. These attach fast when installing on a MaxxAir fan. There is an optional MaxxAir # MA00-955202 bug screen, but you have a screen inside and this mess will further reduce air flow in my opinion. I have attached a video demonstrating the installation.
    view full answer...
  • How to Properly Seal When Installing a Roof Vent
    When installing the MaxxFan Deluxe Roof Vent w/ 12V Fan, Thermostat, and Remote # MA00-07500K you will want to use both the Butyl Tape # 362BT-18x1-50 for under the flange and Alpha Systems 1021 Self-Leveling Sealant # AL98KV to cover the flange and screws to get a complete seal. I have included an installation video that demonstrates installing the fan and the use of the butyl tape and self leveling sealant.
    view full answer...
  • Replacement Vent For Fantastic Vent Series 6000 That is Obsolete
    You will need to replace your 6000 series fan with an updated Fan-Tastic Vent Roof Vent w/ 12V Fan and Remote # FV807350. The 6000 series parts are obsolete. You will need a Roof Vent Installation Kit # CAM25013 with 2 tubes of Self-Leveling Sealant # AL98KV to seal the new vent. I recommend installing the Fan-Tastic Vent Ultra Breeze Trailer Roof Vent Cover # FVU1400GRS over the vent. This will protect it and allow you to run the vent even in the rain.
    view full answer...
  • Recommended 12v Fan For Keeping A Horse Trailer Cool
    With you trying to run off of just 12v power you're going to limited to just roof vents with a 12v fan to cooler your horse trailer. There isn't a similar option to the # KH43100 without the heater that would be anything other than a simple desk fan. I recommend installing the MaxxFan Deluxe Roof Vent # MA00-06401K (Black) or # MA00-05301K (White). These vents come with a 12v fan with 4 speeds to exhausts hot air out or circulates air like a ceiling fan when the vent is closed. They have...
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  • Recommended Powered RV Vent For A 2013 Heartland Trail Runner With A 7-1/2" Thick Roof
    Technically you could use the Ventline Ventadome Trailer Roof Vent w/ 12V Fan # V2094SP-30 or the # V2094SP-28 but the garnish wouldn't be long enough to accommodate the depth of your ceiling. The largest garnish we carry for Ventline fans is # VA0445-37 at 5-5/16" so you'd have a gap between the vent and the garnish. You'd honestly be better off with the MaxxFan Mini Plus Manual RV Roof Vent w/ 12V Fan - LED Light - Black # MA00-03851 or # MA00-03801 for white cover. These two vents...
    view full answer...

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