XFasten Butyl Tape Black, 1/2 in x 30 ft x 1/8 in

Curated from 102 real Reddit conversations

Refreshed on: March 17, 2025

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XFasten Butyl Tape Black, 1/2 in x 30 ft x 1/8 in

Brand: XFasten
Price: $13
Snoop Score:
7.1
Sentiment
7.0
Popularity
4.8
Technical
7.9
Buy on Amazon for $13See All Butyl Tape Reviews
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Snoop's Take

The XFasten Butyl Tape is a versatile automotive sealant tape designed for a variety of sealing applications, including RVs, windows, and windshields. This product offers an airtight seal that withstands extreme temperatures and provides a mess-free application, ensuring a professional finish for all your repair needs. Consumer feedback highlights the tape's ease of use and effective sealing capabilities. Users have praised the product for its durability, with one stating, "it works better and is cleaner than coax seal," while others appreciate its mess-free application. However, some users expressed frustration regarding its softness, noting it can melt easily, which may complicate repairs. Overall, the XFasten Butyl Tape is recommended for those seeking a reliable sealing solution, particularly for outdoor and automotive applications. Despite some minor drawbacks, its strengths in providing a clean, durable seal make it a valuable addition to any toolbox.

Not for you? Check out our other rated Butyl Tape

Butyl tape remains pliable unlike caulking it's very easy to remove with a little bit of carburetor cleaner brake cleaner Napa alcohol even WD-40 will release butyl tape.

Positive Feedback

It was too soft, melted too easy I had to put it in the freezer to be able to use it.

Negative Feedback
Product
7.1
XFasten Butyl Tape Black, 1/2 in x 30 ft x 1/8 in
Buy on Amazon for $13
RV and Trailer Sealing
8 / 10
Automotive Repairs
8 / 10
Marine Applications
8 / 10
Construction and Home Improvement
8 / 10
See how this compares to all Butyl Tape

What it does well!

Key strengths users can’t stop talking about.
Easy to remove and use for repairs
“Butyl tape remains pliable unlike caulking it's very easy to remove with a little bit of carburetor cleaner brake cleaner Napa alcohol even WD-40 will release butyl tape.”➕
“But you're going to have a hard time finding a decent roll for $4.”➕
“As a temporary bandaid would butyl tape work to patch this slice?”➕
“Recalled wicked dolls pop up in Madera CA.”➕
Useful for soundproofing in vans
“Apparently really useful to avoid the noise reverb from rain or other things.”➕
Mess-free application with professional finish
“Seems to be some type of sealer, but it's not really weatherstripping material.”➕
“Wasn't sure name of it but figured multipurpose.”➕
“It also protects the top of the joist from standing water.”➕
“I first did it here in MN 12 years ago, when ‘joist tape’ didn’t exist.”➕
Airtight sealing and durability
“It's a roll of butyl sealing tape.”➕
“The openness of the non-mortared wall allows for all of the water to exit before it can freeze.”➕
Easy to use and install
“Yes. Great stuff.”➕
“Install according to instructions (stretchy thing, then 50% or so overlap.”➕
Works well for sealing applications
“Works better and is cleaner than coax seal.”➕
“Great comment.”➕
Butyl tape is preferred by users for sealing applications
“butyl is king, make sure you buy the right butyl, im talking about marine butyl thats gray from bed-it.”➕
Recommended for its effectiveness in various conditions
“Butyl tape pushes things apart, so only if you have a strong mechanical bond like thrubolts, and never near petroleum.”➕

Where it needs some work!

Areas to watch—feedback on possible improvements.
Butyl tape is too soft and melts easily
“It was too soft, melted too easy I had to put it in the freezer to be able to use it.”➕
“I think joist tape is over-rated. Don't think it will actually extend the life of a deck much. I wou”➕
Butyl tape will cause frustration with repairs
“That butyl tape will make you hate life when you go to patch it in the spring.”➕
“Ok so this was my too afraid to ask question and I think you answered it. I’ve personally never hear”➕
Butyl tape is not suitable for use around fuel fills
“Butyl is great except for around any fuel fills.”➕

Compare On All Talked About Dimensions

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Second Skin Butyl Sealant TapeSecond Skin Butyl Sealant Tape$23
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TAGLLY Butyl Sealant Tape - 13Ft Butyl Rubber SealantTAGLLY Butyl Sealant Tape - 13Ft Butyl Rubber Sealant$9
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Rvhouse Butyl Tape White 1” x 30 FtRvhouse Butyl Tape White 1” x 30 Ft$13
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XFasten Butyl Tape Black, 1/2 in x 30 ft x 1/8 inXFasten Butyl Tape Black, 1/2 in x 30 ft x 1/8 in$13
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Hanotic Joist Tape for DeckingHanotic Joist Tape for Decking$48
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JOAPRIL Butyl Adhesive Tape 2x50'JOAPRIL Butyl Adhesive Tape 2x50'$85
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Dicor BT-1834-1 Butyl Seal TapeDicor BT-1834-1 Butyl Seal Tape$13
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ZOOFOX 2 Pack Butyl Seal TapeZOOFOX 2 Pack Butyl Seal Tape$19
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Typar Butyl Flashing Tape - 4" W x 75' LTypar Butyl Flashing Tape - 4" W x 75' L$25
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Stacool 13FT Car Headlight Sealant Butyl TapeStacool 13FT Car Headlight Sealant Butyl Tape$8
3.1
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Oleitodh 4 Rolls Butyl Sealant TapeOleitodh 4 Rolls Butyl Sealant Tape$32
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LLPT Butyl Tape White 1 Inch x 33FtLLPT Butyl Tape White 1 Inch x 33Ft$13
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TAPEBEAR Butyl Tape Waterproof Sealing TapeTAPEBEAR Butyl Tape Waterproof Sealing Tape$19
1.0
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Greatshoot Butyl Tape Waterproof Sealing TapeGreatshoot Butyl Tape Waterproof Sealing Tape$6
0.5
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Core Power Plays

The specs and strengths that make it shine.
User reports success with the same product in cooler conditions
“Odd, I used this exact stuff and had great luck with it.”➕
“that is way overkill for that kind of task and also too thick for most applications imo”➕
Discussion on various sealant options and their specific uses
“I'm finding myself slightly confused over the above deck sealing options available and would love some clarification on when to use butyl tape.”➕
“I like that it never dries out or cures, and cleans up with mineral spirits.”➕
“Silicone is one of the worst contaminants around.”➕

Hidden Hero Hacks

Unexpected tricks and side‑door uses you’ll love.
Valued by vanlifers for various uses
“It is a vanlifer's best friend.”➕
“Works great and is relatively easy to remove.”➕
Alternative temporary sealing options suggested
“Yeah but the average homeowner simply won’t have access to this and especially on a Sunday unless they know a commercial roofer.”➕
“if you do want a temporary fix, I'd use Zip Tape over something like butyl tape.”➕
“Works amazing.”➕

Buyer’s Cheat Sheet

What to check before you click ‘Add to Cart.’
Discussion on necessity and effectiveness in various climates
“Butyl tape Is this really worth the cost and labor?”➕
“If you’re worrying about butyl then you’re probably going to be fine in the long run because you’re a smart feller.”➕
“Not sure why. Last summer we had to replace all the joist that didn’t get taped but the ones that were have at least another decade in them.”➕
“In those locations, I'd probably do it.”➕

Cautionary Callouts

Know the pitfalls before they catch you off guard.
User had better luck with other sealing products
“it works well and seals nicely.”➕
“Worked perfectly and was way easier to wok with than butyl.”➕
“you can actually leave it on and just screw it together.”➕
“it’s a hit or miss especially on how the home owner treats their deck.”➕

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