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LaSalle Bristol Butyl Tape for XTRM RV roof membranes - 30' x 3/4" - Gray

LaSalle Bristol Butyl Tape for XTRM RV roof membranes - 30' x 3/4" - Gray

Item # 344270341410-1
Our Price: $30.25
RV Roof Repair
Shipping Weight: 2 lbs
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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 LaSalle Bristol. LaSalle Bristol Butyl Tape for XTRM RV roof membranes - 30' x 3/4" - Gray part number 344270341410-1 can be ordered online at or call 1-800-940-8924 for expert service.
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LaSalle Bristol RV Roof Repair - 344270341410-1

  • Tape
  • White
  • 30 Feet Long
  • Butyl Tape
  • LaSalle Bristol

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 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
    • Designed for use with LaSalle Bristol XTRM RV roof membranes
    • Won't crack, harden, or shrink
  • Easy to use - press tape firmly to first surface, remove backing, and then press onto second surface for an even seal
    • Trim grade tape means you can easily scrape away excess with a putty knife
    • Applies best to clean and dry surfaces
  • Gray color
  • Made in the USA


  • Quantity: 1 roll
  • Dimensions: 30' long x 3/4" wide x 1/16" deep

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.

270341410B LaSalle Bristol XTRM Butyl Tape - 30' Long x 3/4" Wide - Qty 1


Customer Satisfaction Score:

Customer Reviews

LaSalle Bristol Butyl Tape for XTRM RV roof membranes - 30' x 3/4" - Gray - 344270341410-1

Average Customer Rating:  4.7 out of 5 stars   (56 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.


Thank you for the quick delivery of the replacement roll of Butyl Tape. Customer service is top-notch at eTrailer


Great place to get trailer parts and supplies from. Will patronize again.


It was easy to work with. Sealed my new roof fan to my travel trailer.


My shipment came in two separate pieces as was expected. Both arrived in good condition. The slide topper was delivered by freight. I was contacted in advance to arrange for delivery.


So far, so good. We used this on our new ventilation system Maxx Air fan and so far, everything is good. I will know more once we experience a good rain, but for the past week, it's been holding up well.


works well


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



Sealed well, and so far is holding up well.


Happy with this product. I will be ready when we make it up to the 5th wheel trailer. Hopefully we can get up to our land and get it ready for the year.
Thank you for the ease of ordering and delivery was fast.



Still working great


for the job i had to do received more than enough tape. tape was delivered in great shape. easy to use.



I changed out a faulty fan in my RV and then sold the RV


Product was as expected; arrived in perfect condition & as always very promptly. Need the butyl tape to seal mounting rails for slide toppers.


Great product! 2 rows covered the edge of the replacement RV roof vents.


Works as described, works great for sealing awning rails


Uniform thickness. Shipped well, did not crush or stick together. Paper pulled off easily and applied nicely.

Used to seal the front nose on my 5er after replacing the fiberglass paneling.


Delivered early, perfect fit and easy installation for trailer door window replacement.


Item arrived as ordered. However, the packaging was not adequate. The roll was deformed and twisted from shipment movement. Hoping the tape is fully operational as intended when I use it. Suggest this item be wrapped in some sort of confining material before placing it into a box that is bigger than the item. That could avoid my issue.


After a year in WT heat and cold this product is still looking good.


Just received it today. It's a bit cold to apply low 40's, at least for my hands. Product is uniformly shaped and very sticky it should work very well on pop up trim seal.


Very easy to work with and completely effective with lasting results.



Remains and excellent product one year out.


If you haven’t ordered from etrailer you should because they’re always going to let you know about your orders status


Thank you for checking in with me. All parts were correct, fast delivery, great prices, and when in doubt the how to videos are so very helpful. Will order more in the future I am sold on e trailer. Thank you.

by: 02/12/2021

Excellent product. Thanks to Bob and the crew for installing this. See the video of the installation.

Frank H.


The product is working out great. Have not had any issues so far. I would recommend this product


Perfect for sealing under the vent fan


Good product works well

Richard M.


Works perfectly no leaks around the mounting hardware


I will give all of my products a 5 star review. I was very happy to find the box at my door. I have not been able to use any of it yet due to weather. I am excited to use it as soon as the weather clears.


Wish it was white since you can see it in some areas against the white roof but it does it’s job

Show More Reviews

See what our Experts say about this LaSalle Bristol RV Roof Repair

  • Could Butyl Tape Be Used to Seal Around Wiring
    Yes, you could use butyl tape like # 344270341410-1 to seal around wires if you wanted to. It would seal well and wouldn't damage the wiring.
    view full answer...
  • Will LaSalle Bristol XTRM Butyl Tape 344270341410-1 Adhere to EPMD Roof Membrane on Jayco Kiwi
    LaSalle Bristol XTRM Butyl Tape # 344270341410-1 will stick to ethylene propylene diene terpolymer (EPMD) roof material as well as to Eternabond tape. I confirmed compatibility with the technical team at Lasalle Bristol. The butyl material remains flexible and its adhesion to the surface it is applied to will actually get stronger over time.
    view full answer...
  • Can You Only Use Butyl Tape For Trailer Roof Vent
    Technically you can only use Butyl Tape # 344270341410-1 around your roof vent, but doing so will very likely lead to leaks. So I definitely recommend using Sealant # 344270341437-1.
    view full answer...
  • Installing A Solera Slide Out Topper On Factory Installed C Channel
    I spoke with Lippert and their tech said most awning rails are a standardized size and that you shouldn't have any issues installing your # LCV000184673. If for some reason your C Channel is giving you too much trouble the # LCV000184673 kit comes with a J Channel you can easily install with a few screws. I recommend using Butyl Tape # 344270341410-1 to protect against any water damage.
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  • Solera Slide Awning Mounting Screws
    It is true that movement and stress can cause screws to become loose over time but adding Butyl Tape Item # 344270341410-1 to the mounting bracket before installing it on the slide out can help prevent movement of the screws and prevent water from getting into the screw holes and rusting out the screws. I've attached an installation video where you can see the butyl tape being applied before installing the mounting bracket.
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  • Upgrading From Dometic Manual Awning Arms To Solera Powered Awning Arms
    Yes, with your current Dometic arms being 77-1/2" in length the Solera 12V Power RV Awning Conversion Kit # LC434724 would be a great powered replacement. These arms are going to come with some adapters to make them compatible with your Dometic roller tube so that you can keep the replacement cost down. You'll just want to ensure you fill in any holes leftover from your old arms and use some butyl tape # 344270341410-1 on each of the new screw holes you'll be making when installing the...
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  • Recommended Gap Filler For A Vehicle Tail Light
    Depending on the size of the gap you can just use a foam gasket like the Taylor Made Sponge Gasket for Boat Hatch Lids # 3691725 or Taylor Made Sealing Foam for Boat Hatch Frames - 8' Long x 3/4" Wide # 3691726. Both of these can be cut down to size and will stick to the body of your vehicle allowing your tail light to be removed easily when needed.
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  • Replacing RV Door Window and Frame with Butyl Tape Sealant
    For what you are describing, I recommend the LaSalle Bristol XTRM Butyl Tape - 60' L x 3/4" W - Qty 1 # 344270341410-1. This tape is a sticky pliable tape that will create a moisture barrier so it will help keep the glass in place for installation as well as created the weather seal you referenced. This sealant is used on vents, awnings, and windows for a good weather seal.
    view full answer...
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  • Window Gasket Seal Recommendation for 2019 Keystone Cougar Travel Trailer
    To seal up a window I recommend using the LaSalle Bristol Butyl Tape for XTRM RV roof membranes # 344270341410-1. This measures 30' long x 3/4" wide and while it is typically used for roof vents, it can also be used for windows, doors, and anything else you need to seal up, so it will work great for you!
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  • Dimensions of Valtera Entry Door Replacement Window and Frame
    The Valterra Entry Door Window Frame Assembly - Exterior - Black # A77051 has frame dimensions of 15-3/4" wide x 24-3/4" tall and glass dimensions of 12" wide x 21" tall. It sounds like this is a perfect replacement for your trailer. I would use butyl tape # 344270341410-1 for the sealant.
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  • How To Reseal RV Window Trim
    To reseal the window trim you'll want to first clean off the old sealant with some composite tools # PT73HJ (to prevent scratches to the trailer wall). Once the old sealant is removed you can clean the surface with some rubbing alcohol and then apply some non-sag sealant # 344270341437-1.
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  • Are Installation Screws Included With The MaxxFan Mini RV Roof Vent MA00-03801?
    The MaxxFan Mini Plus Manual RV Roof Vent # MA00-03801 does indeed include mounting screws. However, it does not include sealants so you will also need LaSalle Bristol Self-Leveling Sealant # 34427034145-1 and Butyl Tape # 344270341410-1 to get a weather-tight seal. Our returns policy is a bit long, so I have it linked below if you wish to read it in its entirety. That said, the main points are as follows: -Within 60 days of receipt of your shipment -New, unused item -Shipping and handling...
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  • Will Fan-Tastic Vent Roof Vent # FV802250 Fit a 2015 Thor Freedom Elite 23H
    Fan-Tastic Vent Roof Vent # FV802250 fits the standard 14-1/4 inch square rough opening size of most all roof vents so it will fit your 2015 Thor Freedom Elite 23H. Not all vents come with mounting hardware but this one does include a total of 22 screws as well as some wire and butt connectors. We do not have the Eternabond brand of tape but we do have the similar LaSalle Bristol XTRM butyl tape # 344270341410-1 which is used with membrane such as # 3441700534142711425 to fix damaged roofs.
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  • Correct Size Awning for a 55 Wide x 27 high Dinette Window
    Great question! Yes the Solera 18" Projection Window Awning Roller - 60" Wide - Sand Fade w/ Black Weather Guard Item # LCV000335058 and the Solera 18" Projection Window Awning Support Arms for RVs - Black Item # LCV000334750 are perfect for that size window. The awning provides 2 1/2" of over hang on each side of the window so you have plenty of coverage. You also want to make there are no obstructions where your arms will mount to the side wall. I also recommend LaSalle Bristol XTRM...
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  • Slide Topper Awning For A Jayco Eagle HT 284BHOK 154.5 Slide Out
    When measuring the slide out you'll want to measure from outside edge to outside edge of the flanges to get the correct measurement. A lot of times slide outs are close to awnings or doors so you have to account for the overhang of the arms when figuring what size will fit your slide out. As long as there are no clearance issues the Solera RV Slide-Out Awning - 13'1" Wide - 48" Projection - White Item # LCV000163300 is sized to fit 152" - 157" wide so this will fit your 154.5" wide...
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  • Slide Topper Awning For 121.5" Flange To Flange Measurement
    For your specific measurement and clearance I recommend the Solera RV Slide-Out Awning - 10'1" Wide - 48" Projection - Black Item # LCV000182037.The arms are going to need 2.75" of clearance so you'll need to center the topper 1/4" to the left to make sure the arms will fit between your other awning arms. I also recommend using Butyl Tape Item # 344270341410-1 to help waterproof the screw holes for your brackets.
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  • Slide Toppers For 85, 86 and 82-1/2 Slide Outs On Fifth Wheel Trailer
    I am happy to help you find the awnings that you need with the box width measurements you have provided. I recommend one 8' Solera Slider part # LCV000168106 for the 86" box width. Please keep in mind 6" Of clearance beyond the outside edges of the box is required to accommodate the overall length of the assembly so you do want to make sure the awnings will not interfere with each other once installed. I recommend Solera 7.5' slider part # LCV000165062 for the 85" box widths and 82-1/2"...
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  • Recommended Ladder for 2014 Dutchman Voltage Camper
    I recommend the Stromberg Carlson RV Exterior Ladder # LA-401BA to add to your camper. It has an aluminum construction and a black finish so that it blends in with your camper. This kit will come with the hardware to get it installed. I recommend using Butyl Tape # 344270341410-1 under the attachment points on the roof and wall of your camper. You will also need a tube of self leveling sealant # 34427034145-1 to put on top of the screws and feet on the roof.
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  • Recommended Roof Rack for Raven High-Top Shell
    For your Raven shell High-Top, I recommend the Rhino-Rack Aero Bar Roof Rack for Camper Shells - Track Mount - Black - Standard - 65" Long # Y02-500B. This will give you everything you need for parts. I do recommend using some butyl tape like # 344270341410-1 for a good water seal since you will be drilling into your roof.
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  • What is Difference Between Stromberg RV Ladders LA-401 and LA-401BA
    The only difference is the color. The part # LA-401 is silver in color and part # LA-401BA is black. I would also recommend LaSalle Bristol XTRM Butyl Tape - 60 L x 3/4 W - Qty 1 Item # 344270341410-1. Butyl tape goes between the wall and the mounting bracket on the leg and covers the srew holes. The screw will grab onto the butyl tape and pull it into the hole to help seal it from water getting into the wall.
    view full answer...
  • Recommended Replacement For A Ventline AS-13M RV Roof Vent
    An AS-13M is an older Ventline model so I recommend just replacing it with a MaxxFan Mini Plus Manual RV Roof Vent # MA00-03851. This powered vent features a rain shield that will allow you to use your vent in any weather or even while driving. The LED ring light will offer extra light to see in your trailer or just offer a nice accent. I do recommend picking up some Butyl Tape # 344270341410-1 and Self Leveling Sealant # 34427034145-1 to complete your installation as the vent will only...
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  • Recommended Slide Out Topper Awnings For A 2020 Jayco Eagle HT Fifth Wheel
    For the slide outs on your 2020 Jayco Eagle HT Fifth Wheel I have the following recommendations for you: For the 86" slide out I recommend the Solera RV Slide-Out Awning - 7'7" Wide - 48" Projection - Black # LCV000168106. For the 145" slide out I recommend the Solera RV Slide-Out Awning - 12'1" Wide - 48" Projection - Black # LCV000177334 or # LCV000163298 for white. You do not need to worry about the mounting hardware being installed already, this seems to be the new trend for manufacturers...
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  • Slide Toppers in White Appropriate for 12 Foot Slide, 8.5 Foot Slide, and 5 Foot 10 Inch Slide Out
    Thanks for the info. I'm happy to assist with the correct fits which are based on flange to flange measurements of your slides and will be purposefully wider than your slide for the hardware. For your 12 foot slide use # LCV000163298 (slide out width range of 140 to 145-3/4 inches). For your 5 foot 10 inch slide use # LCV000163279 (slide out width range of 68 to 73-3/4 inches). For your 8 foot 6 inch slide use # LCV000163290 (slide out width range of 98 to 103-3/4 inches). These slide...
    view full answer...
  • Slide Topper for 84-1/2 Inch and 149-1/2 Inch Flange to Flange Measurement
    We have exactly what you need, with the Solera RV Slide-Out Awning and does include the rail, and I'll give you the part numbers based on your measurements. - 84-1/2": Solera RV Slide-Out Awning # LCV000165062 (Black) or # LCV000163287 (White) - 149-1/2": Solera RV Slide-Out Awning # LCV000165061 (Black) or # LCV000163299 (White) In addition, the 3-1/2" you mentioned is plenty for the slide topper for water will not sit on top. For weather tape (butyl tape) you can use the Butyl Tape...
    view full answer...
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Info for this part was:

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Expert Research:
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Expert Research:
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Employee Kathleen M
Video by:
Kathleen M
Employee Michael B
Video by:
Michael B
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
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Employee Cody B
Updated by:
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Employee Carrie F
Updated by:
Carrie F
Employee Amanda M
Edited by:
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Employee Shane H
Test Fit:
Shane H
Employee Robert C
Installed by:
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