bing tracking image
  1. RV Roof Repair
  2. Alpha Systems
  3. Tape
  4. Colors May Vary
  5. 20 Feet Long
  6. Butyl Tape
Alpha Systems Butyl Tape for RV Weatherproofing - 20' x 1" x 3/16"

Alpha Systems Butyl Tape for RV Weatherproofing - 20' x 1" x 3/16"

Item # AL28FJ
Our Price: $20.00
RV Roof Repair
Shipping Weight: 3 lbs
Add to cart
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Need help with installation?
Locate installers near me
Butyl tape is an essential tool for weatherproofing marine and RV components. This sturdy material creates a long-lasting, weatherproof gasket to fill gaps between your RV's outer hull and the mounting points for vents, windows, and doors. Great Prices for the best rv roof repair from Alpha Systems. Alpha Systems Butyl Tape for RV Weatherproofing - 20' x 1" x 3/16" part number AL28FJ can be ordered online at or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (144)
  • Q & A (0)
  • Photos

Alpha Systems RV Roof Repair - AL28FJ

  • Tape
  • Colors May Vary
  • 20 Feet Long
  • Butyl Tape
  • Alpha Systems

Butyl tape is an essential tool for weatherproofing marine and RV components. This sturdy material creates a long-lasting, weatherproof gasket to fill gaps between your RV's outer hull and the mounting points for vents, windows, and doors.


  • Butyl tape functions as a gasket for a weatherproof seal when mounting RV or marine components
    • Sticks to the underside of mounting brackets and installation points before pressing into place on your RV or boat
    • Provides for greater protection from the elements than using sealant alone
    • Prevents the intrusion of moisture into nail or screw holes
  • Adhesive works on most nonporous materials including roofing membranes and metal
    • Won't crack, harden, or shrink
    • Can be applied in temperatures from -5 degrees F to 120 degrees F
  • Easy to use - press tape firmly to first surface, remove backing, and then press onto second surface for an even seal
    • Applies best to clean and dry surfaces
  • Made in the USA


  • Quantity: 1 roll
  • Dimensions: 20' long x 1" wide x 3/16" thick
  • Application temperature range: -5 F - 120 F
  • Colors may vary
  • 1-Year limited warranty

Butyl tape is used primarily as a gasket for preventing moisture from leaking into your RV around cutouts in the hull for vents, doors, windows, and wiring outlets. Butyl tape is widely used by RV manufacturers because of its high performance and durability. It does not dry out and crack over time, and its strong adhesive quality means it sticks and stays in place on smooth surfaces.

Butyl tape is most often used in conjunction with sealants to create the highest level of weatherproofing to prevent leaks and ongoing damage. It's ideal for use in areas where fixtures need to be drilled, nailed or bolted into place. The rubbery material keeps those openings sealed and free from water damage. While this is great for those who do their own repairs and upgrades, butyl tape is also good to have on hand to make temporary repairs. The tacky material can plug up any problem areas and hold strong, so you don't have to cut your trip short.

2020002263 Alpha Systems Q130 Butyl Tape for RVs - 20' x 1" x 3/16" - Quantity 1

Replaces 2020328719 and AL72FJ

Customer Satisfaction Score:

Customer Reviews

Alpha Systems Butyl Tape for RV Weatherproofing - 20' x 1" x 3/16" - AL28FJ

Average Customer Rating:  4.6 out of 5 stars   (144 Customer Reviews)

Butyl tape is an essential tool for weatherproofing marine and RV components. This sturdy material creates a long-lasting, weatherproof gasket to fill gaps between your RV's outer hull and the mounting points for vents, windows, and doors.


Good quality butyl tape. has friendly service with good follow up on orders.


Turned out 1" wide when I thought it was 1/4" but is a quality butyl tape


Easy to use, I put in a new roof vent and fan. Still sealing and no leaks.


Worked very well to easily and securely seal the light fixture.



Seal is watertight and secure after a lot of miles of travel.


This stuff worked great for sealing my new awning arms to the coach.


The butyl tape worked perfectly sealing a leaky window.


Product is awesome. However the way it was packaged made the product unusable so it wasn’t shipping problems it is packaging problems.

Etrailer Expert

Jenny N.


That is not what we want to hear. I will have our Customer Service team reach out to you.


No attempt to package correctly. Came completely squashed and stuck to all of the other products in my order.

Etrailer Expert

Katrina D.


Yikes, lets get you over to customer service so they can see what they can do for you.


did not come with a remote control the box was open with the tape inside of it ????

Etrailer Expert

Brooke M.


Oh my, I will make sure our customer service team gets a hold of you about this.


Very sticky! I actully went around the vent opening twice. Very flexible, I was able to mold it around the corners so there is only one seam, which I was able to smoosh togethter so there is no chance of water getting through.


Worked as advertised and shown on [onine videos]


I used this butyl tape for marine application. It's butyl tape plain and simple. Seals deck and port light fittings as expected. Fair price for the product.


Does it's job well


I changed out the OEM bathroom fan with a Maxxair variable speed fan and used this tape for sealing the surface on the roof. It worked wonderfully!


Used it under brackets to seal screw holes through the roof when installing a solar panel on our trailer. Does what it is supposed to do. Comes in a 20' roll where we only needed about 8" of it. Oh well, now we have plenty if there is further need for weatherproofing.


Product was as described.



All perfect!


Works great


i am very happy with this product and any other purchases I've made in the past on this site for our camper. I can always count on etrailer for anything im looking for !!! thanks so much for everything.


Used this tape on some replacement skylights. It’s a little tricky to get on as it is not rigid. I found cutting to length prior to applying worked best for me. I found that in the end it was very forgiving.


Reasonably priced and shipped quickly


etrailer support has been great !

- 5

Value - 4

Shipping - 4

Quality - 5


Great customer service and will continue to use etrailer. Ordered on Thursday and received Friday.


Overall it was good. The only issue was the shipping. I paid for 3 to 5 day shipping and according to your tracker it wasn't Evan pulled from the shelves till after 5 days of the order and I received the order 5 days after that. One on the items in the shipment was stuck to the box and needed a little protection. (pic included)


In Florida we get some heavy rain and no leaks yet


Must have for weatherproofing.

Show More Reviews

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

  • Where Is Alpha Systems Butyl Tape Manufactured
    Alpha Systems Q130 Butyl Tape for RVs # AL28FJ is manufactured in Elkhart, Indiana.
    view full answer...
  • Adhesive for Securing Frameless Window in 2019 Coachmen Apex Nano 193BHS
    Everything I am finding online is saying to use a black urethane adhesive for a frameless window like you have. That is not something we carry though. You could use butyl tape like the part # AL28FJ as well and have a similar result as that is what a lot of RV manufacturers use and it works well.
    view full answer...
  • Adhesive for Reattaching Window of 2018 Apex Nano 193BHS
    Most RV windows are held on with butyl tape which you could use the part # AL28FJ on your 2018 Apex Nano 193BHS to reattach yours.
    view full answer...
  • 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...
  • Recommended Slide Out Awning For An 81 Flange To Flange Measurement
    The Solera RV Slide-Out Awning - 7'1" Wide - 48" Projection - Black # LCV000165062 you were looking at already is the correct size for your 81" flange to flange measurement. This specific awning has a fitment range of 80" - 85" so you can expect a total overhang (including the arms) of approximately 4.5" on each side. As long as you have enough clearance on both sides of the slide out so that this topper doesn't come into contact with anything you'll be good to go. If you do have something...
    view full answer...
  • Recommended Exterior Ladder For A 2016 Forest River Wildwood M-27RKSS Travel Trailer
    If you're wanting to add on a ladder to your 2016 Forest River Wildwood M-27RKSS Travel Trailer then the Stromberg Carlson RV Exterior Ladder w/ Hinges - Aluminum - 99-1/2" Tall x 12" Wide # LA-401 you were looking at would be a great option. This ladder is a universal fit that can easily be cut down to fit the height of your trailer. I do recommend picking up some butyl tape # AL28FJ and some non-sag sealant # AL28KV to ensure that you don't have any water leaking in through your mounting...
    view full answer...
  • Slide Out Topper Extrusion Rail Placement When A Rain Gutter Is In The Way
    The C-Channel of the extrusion rail that your Solera RV Slide-Out Awning # LCV000168106 is going to slide into needs to be placed 3-inches above the slide out flange. If you can get close to 3-inches by butting the C-Channel up against the gutter then you'll be fine. If you're only getting 2" then I personally would remove the gutter and raise it to give your slide topper enough room to mount correctly. Make sure that you place some butyl tape # AL28FJ on the back of the interior brackets...
    view full answer...
  • Can Solera Slide Out Awnings Be Mounted To RV's With Aluminum Siding
    Yes, the Solera RV Slide-Out Awning # LCV000163285 is capable of being mounted to aluminum sided trailers. I've attached a picture below of this awning being attached to aluminum sidewalls from a customer review. I recommend grabbing some butyl tape # AL28FJ for your brackets to ensure a nice watertight seal.
    view full answer...
    Image 1 for
  • Upgrading An A And E Manual Awning To A Power Awning On A 2020 Forest River Georgetown Motorhome
    You can upgrade your A and E manual awning to an electric awning by using The Solera 12V Electric RV Awning Conversion Kit # LC434724. This kit has a simple bolt-on installation with included hardware and will wire into your RV's power supply. A 2-1/2 inch minimum clearance is needed between the awning rail and the top of the entry door. The power switch will mount inside or outside your RV for a easy convenient access. Butyl Tape # AL28FJ (sold separately) is recommended to seal the...
    view full answer...
  • How Long Does It Take To Install A Solera Rv Slide-Out Awning
    Having installed numerous slide toppers it only takes me about 15-20 minutes to get everything out and organized and then mounted up on the trailer. Before I place the final two screws into the extrusion rail to lock the bead in place and prevent the fabric from sliding in the rail I usually run the slide out in and out a few times to get all the wrinkles out, which can about 10-15 minutes. Overall with no experience and an extra set of hands you could easily have this in place in about...
    view full answer...
  • Recommended Stainless Steel Door Holders With A 1 x 2-1/4 Mounting Pattern
    The T-Style Hook and Keeper Door Holder for RV or Enclosed Trailer - 6" Hook # 37210525 and 4" # 37210515 both have a mounting pattern of 1" x 2-1/4" (seen below) so you should be good to just reuse your current mounting holes. I do recommend putting some butyl tape # AL28FJ on the bracket to help seal up those mounting holes so that water doesn't leak through.
    view full answer...
    Image 1 for
  • How To Measure A Slide Out For A Solera Slide Out Awning
    You'll need to measure the outside edge of the flange to the outside edge of the other flange to determine the size needed. You will want to note if there's anything nearby that could interfere with the arms of the awning when you retract the slide out. The Solera RV Slide-Out Awning # LCV000251461 you were looking at will fit 110" - 115" flange width measurements. I've attached one of my installations video below where I'll walk you through the whole process of measuring and installing...
    view full answer...
  • What Do The Mounting Screws For Solera Awnings Screw Into On An RV
    The four bolts placed in the top of the awning arms like the # LC405523 typically hit a brace while the rest just connect with the backerboard for the wall. I do recommend using some butyl tape # AL28FJ to help prevent any leaks through your mounting screws and it will also help hold it to the wall while you bolt the arm in place.
    view full answer...
  • Can You Buy Half Of An RV Ladder To Replace The Original On A 1993 Four Winds Class C Motorhome
    The only ladders we currently carry are a universal style, with only a few minor differences in height and paint jobs. You can get the endcaps, support legs, and replacement steps for the Stromberg Carlson Exterior RV Ladder # LA-401, but you can't get just half of the ladder alone. If you do end up replacing your ladder with this I highly recommend sealing up your mounting holes with butyl tape # AL28FJ and some silicone sealant.
    view full answer...
  • Is The Solera 18V Power RV Awning Compatible With A 2016 Fleetwood Bounder 35K Motorhome
    The Solera 18V Power RV Awning # LC729505 is designed to bolt to the side of the RV so you would be making new holes in your motorhome's walls. You'll just need to ensure that the awning arms aren't going to interfere with anything on the side of your motorhome (doors, windows, etc.). The 18' length is from the center of one arm to the center of the other arm (pictured below). The arms are approximately 3" wide so you'll want to do some measuring to ensure the arms are not going to contact...
    view full answer...
  • What Are The Actual Widths Of Solera Awning Fabrics
    Yes, the Solera RV Slide-Out Awning # LCV000168106 is 91" wide by 48" long, but is designed to fit slide out flange to flange measurements of 86" - 91". This means if you measure from the outside of one flange to the outside of the other flange and you fall within this grouping then it will be a fit. You will want to have about 5-7" of clearance on each side for the arms to be able to retract back against the body of the trailer when the slide out is retracted back in. If you do not have...
    view full answer...
  • Will The Surco Exterior RV Ladder Fit A 2003 National Dolphin 6355XL Class A Motorhome
    The ladders we carry like the Surco Exterior RV Ladder # SP501L are all universal fits so the mounting holes will most likely not line up with the mounting holes from the factory ladder. If you do choose to go with a universal fit ladder then I recommend also picking up some butyl tape # AL28FJ and Self-Leveling Sealant # AL28KV to prevent any water from leaking in. I've attached a short video below where I installed a similar style ladder to help walk you through the process.
    view full answer...
  • Can The Surco Universal Exterior RV Ladder Fit The Curved Front Of A Toy Hauler Trailer
    The hinges of the Surco Universal Exterior RV Ladder w Center Hinges for Contoured Rear Wall # SP501L would allow for you to go around the front bump out but with it being so low I don't know if would be a comfortable fit. The top portion of the ladder is approximately 52-1/2" (not including the very top rails that mount to the roof) and the bottom is approximately 48" (including the bend). I recommend measuring the front before and after the bump out first to be certain of fitment. If...
    view full answer...
    Image 1 for
  • Recommended Solera Slide Topper For A 56" Slide Out Measurement
    The smallest Solera slide topper that we currently offer is the Solera RV Slide-Out Awning # LC23FR, which fits 60"' wide slide outs. That being said, at 56" you'd still be within the useable range and would just have a bit extra overhang, which is actually better. The arms of the awning typically extend past the slide out about 2.5" so you'd have that plus an extra 2" for a total of 4-1/2" of clearance needed on either side of the slide out. If there's something else within this space...
    view full answer...
  • RV Exterior Ladder For A 2017 Starcraft Comet Mini Travel Trailer
    The ladders we currently offer are all universal-fit and would require you to cut them down and angle the hinge in the middle to match the curvature of the trailer. You can definitely use a ladder like Stromberg Carlson Exterior RV Ladder # LA-401BA on your 2017 Starcraft Comet Mini Travel Trailer, but you'll want to reach out to the manufacturer to get the stud diagram to ensure you're mounting the ladder to something solid without having to guess. You'll also need some butyl tape # AL28FJ...
    view full answer...
  • Can You Reuse A Dometic CareFree Awning Mounting Bracket For A Thule HideAway Awning
    The Thule HideAway Awning for ProMaster or Sprinter # TH64WJ is not compatible with your Dometic CareFree awning mounting brackets. This kit comes with two brackets that will need to be rivetted to the sidewall of your Travato. I recommend putting a little bit of butyl tape # AL28FJ on the brackets prior to riveting them to the wall to help prevent any water leakage. As for the installer, you can click the "Locate installers near me" link below the picture for the Thule HideAway Awning...
    view full answer...
    Image 1 for
  • Replacement Water Heater Going From Atwood G10-3E Tank To Tankless Water Heater
    My recommendation is the Furrion RV Tankless Water Heater - Gas - Automatic Pilot - 60,000 BTU - 18" x 18" Door, part # FR68SR. This water heater comes with a wall thermostat to adjust the water temperature down to the degree. I recommend using the Alpha Systems Butyl Tape for RV Weatherproofing - 20' x 1" x 3/16", part # AL28FJ, to seal the area around the backside flange area and holes. You will not have to enlarge the door area, but you will have to anchor the new door to the flange...
    view full answer...
  • Is Butyl Tape Used When Installing Fogatti Tankless RV Water Heater
    When we installed the Fogatti Tankless RV water heater part # LSB44FR we did use butyl tape like the # AL28FJ to seal it all up. You can see the entire process in the attached install video on this page.
    view full answer...
  • Can The Stromberg Carlson Exterior RV Ladder Be Used On A 2021 Tiffin Allegro Red 33AA
    The Stromberg Carlson Exterior RV Ladder # LA-401BA is a cut-to-fit universal ladder so you could make it fit, but would need to cut it above the curve of the rear fascia. I recommend picking up some butyl tape # AL28FJ and using some silicone over the mounting screws to prevent water from leaking into the wall/roof of the motorhome. I've attached one of my installation videos below for this ladder to help walk you through the installation process.
    view full answer...

Do you have a question about this RV Roof Repair?

Info for this part was:

Employee Jameson C
Expert Research:
Jameson C
Employee Jacob T
Video Edited:
Jacob T
Employee Wilson B
Updated by:
Wilson B
Employee Cody B
Updated by:
Cody B
Employee Manda E
Updated by:
Manda E
Employee Carrie F
Updated by:
Carrie F
Employee Jonathan Y
Video by:
Jonathan Y
Employee David F
Installed by:
David F
Employee Michael B
Installed by:
Michael B
Employee Halie H
Written by:
Halie H

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.

Product Experts Available Now!
Call 1-800-940-8924