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Crawl Space DIY Butyl Sealant Tape

Curated from 154 real Reddit conversations

Refreshed on: March 18, 2025

Crawl Space DIY Butyl Sealant Tape

Brand: Crawl Space DIY

Price: $39

Snoop Score:

9.8

Sentiment

9.1

Popularity

10.0

Technical

10.0

Buy on Amazon for $39 See All Butyl Tape Reviews

As an Amazon Associate, I earn from qualifying purchases.

Snoop's Take

CrawlSpace-DIY Butyl Sealant Tape is a robust double-sided tape designed for effective sealing in crawl spaces and other moisture-prone areas. This product excels in creating watertight barriers, making it an ideal choice for DIY enthusiasts working on home repair projects such as crawl space encapsulation. Consumer feedback highlights the tape's strong adhesive properties and weather resistance, with users noting, "Been there 8 years. Still stuck." Many users appreciate its effectiveness for sealing vapor barriers and preventing moisture ingress, which is crucial for maintaining dry and pest-free crawl spaces. However, some users mention that while it is effective at sealing, it may not have the highest holding power for all applications. Overall, the CrawlSpace-DIY Butyl Sealant Tape is recommended for anyone looking to tackle home repair projects related to crawl spaces, especially for those who want a reliable sealing solution that stands up to various environmental conditions.

Not for you? Check out our other rated Butyl Tape

Get one that's compliant enough to fill some gaps.
Positive Feedback

This stuff is relatively new to building science.
Negative Feedback

9.8

Crawl Space DIY Butyl Sealant Tape

Buy on Amazon for $39

RV and Trailer Sealing

10 / 10

Automotive Repairs

10 / 10

Marine Applications

10 / 10

Construction and Home Improvement

10 / 10

See how this compares to all Butyl Tape

What it does well!

Key strengths users can’t stop talking about.

Double-sided butyl tape is recommended for sealing

“Get one that's compliant enough to fill some gaps.”➕

“Time went on, no more cockroaches were seen, and the little box under the kitchen cabinet was soon forgotten.”➕

“Butyl tape is really meant for a good seal, it won't have a lot of holding power.”➕

Double-sided butyl tape is effective for sealing

“Looks pretty good to me.”➕

“Your crawlspace seems rather tall and that makes doing it yourself a lot easier.”➕

Effective for sealing

“I plan to seal the concrete block with Dry Lock water proofing paint and put a 10 mil vapor barrier down over the gravel.”➕

“If it’s not much, I’ll have a go myself. If it’s a lot, I’ll get a tradesperson in.”➕

Weather resistant for various temperatures

“No plastic vapor barrier will stand up to constant walking.”➕

“I’m new to home ownership and not experienced in this.”➕

“They also seal the joints.”➕

Strong adhesive mass

“You need to take a good look at your outside drainage.”➕

“From what I could see, there was no evidence of water.”➕

Double-sided tape is effective for sealing

“If you're encapsulating, you go up to the top of the cinder, just below joists, and Ramset it there.”➕

Recommended for sealing vapor barriers

“Does it even matter?”➕

“Definitely tape and use a good tape.”➕

Effective sealing for crawl spaces

“Been there 8 years. Still stuck.”➕

Effective for sealing vapor barriers

“Is sill-seal still a thing (under bottom plate)? I'm getting mixed feedback on this, seems to be thr”➕

“The sill seal will provide a good air barrier and also keep insects from crawling through cracks.”➕

“I'm getting that musty damp crawl space smell up here.”➕

“I need to get a vapor barrier down soon, because with the old one removed there's been an increase in musty old house smell.”➕

Strong adhesive mass for difficult surfaces

“I’m happy to say that I over engineered the shit out of it.”➕

Weather resistant across temperature variations

“Butyl tape is one I’ve seen builders use on occasion, that works too as long as it’s thick enough.”➕

Where it needs some work!

Areas to watch—feedback on possible improvements.

Butyl tape won't have a lot of holding power

“This stuff is relatively new to building science.”➕

Compare On All Talked About Dimensions

Product Name	Price	Score	See Details	Buy Now
Crawl Space DIY Butyl Sealant Tape	$39	9.8	Details	Buy
Better Boat Butyl Tape, RV and Marine Window Seal Kit	$19	8.8	Details	Buy
XFasten Butyl Sealing Tape	$15	8.7	Details	Buy
Second Skin Butyl Sealant Tape	$23	8.4	Details	Buy
TZGP Butyl Rubber Sealant Tape	$7	7.9	Details	Buy
TAGLLY Butyl Sealant Tape - 13Ft Butyl Rubber Sealant	$9	7.3	Details	Buy
Rvhouse Butyl Tape White 1” x 30 Ft	$13	7.2	Details	Buy
XFasten Butyl Tape Black, 1/2 in x 30 ft x 1/8 in	$13	7.1	Details	Buy
Hanotic Joist Tape for Decking	$48	7.0	Details	Buy
JOAPRIL Butyl Adhesive Tape 2x50'	$85	6.5	Details	Buy
Dicor BT-1834-1 Butyl Seal Tape	$13	5.6	Details	Buy
ZOOFOX 2 Pack Butyl Seal Tape	$19	5.3	Details	Buy
GSSI Sealants Butyl Tape 1/8" x 1" x 100'	$34	5.3	Details	Buy
ELK Butyl Seal Tape - 1 Inch x 50 Feet	$29	5.1	Details	Buy
YankMooM Butyl Tape - Waterproof Sealant Tape	$7	5.0	Details	Buy
Akexermu Butyl Sealant Tape	$12	4.4	Details	Buy
ATack Black Butyl Seal Tape	$13	4.4	Details	Buy
Typar Butyl Flashing Tape - 4" W x 75' L	$25	4.0	Details	Buy
Stacool 13FT Car Headlight Sealant Butyl Tape	$8	3.1	Details	Buy
Oleitodh 4 Rolls Butyl Sealant Tape	$32	3.0	Details	Buy
LLPT Butyl Tape White 1 Inch x 33Ft	$13	2.5	Details	Buy
TAPEBEAR Butyl Tape Waterproof Sealing Tape	$19	1.0	Details	Buy
Kohree Butyl Sealant Tape	$12	0.8	Details	Buy
Greatshoot Butyl Tape Waterproof Sealing Tape	$6	0.5	Details	Buy

Core Power Plays

The specs and strengths that make it shine.

Many differing opinions on vapor barrier solutions

“There are so many differing opinions and solutions on this work.”➕

“the gist of it is that there's always water vapor and that vapor wants to move upwards.”➕

“It's almost impossible to completely prevent moisture intrusion in a crawlspace, and so vapor barriers are pretty standard these days.”➕

Various tape options mentioned by users

“I used some aluminum hvac duct tape.”➕

“Crawl space liner seam tape.”➕

Hidden Hero Hacks

Unexpected tricks and side‑door uses you’ll love.

Humorous take on fixing vapor barrier problems

“Because you could probably use that eldritch power to fix your vapour barrier problem.”➕

DIY methods for attaching vapor barriers

“Can help to wrap the end of the plastic around the batten before attaching it to the wall.”➕

“This stuff is the best for the job, but if you're not careful it gets *everywhere*.”➕

Buyer’s Cheat Sheet

What to check before you click ‘Add to Cart.’

Encapsulation can be effective but is challenging for DIY

“Encapsulation would work best not sure if that can be a DIY though.”➕

“You are losing a lot of energy down there.”➕

DIY crawl space repair can be costly and complex

“Overall, some serious bang for my buck, house smells amazing, hasn’t gotten any dew inside on the windows and doors like it used to in the morning.”➕

“The wife tried to convince me to dig it out some and make it my man cave. I’m kinda regretting not doing so.”➕

“I wish you'd do mine. I dread the thought of having to do this.”➕

“Granted, it could be done much cheaper than $2k if you do it yourself, but it's not as simple as rolling the poly out and calling it a day.”➕

Challenges with DIY crawl space repairs

“now I'm finally not living in a fucking cancer box.”➕

“Basement/foundation areas are rarely pretty, but this is decent.”➕

Cautionary Callouts

Know the pitfalls before they catch you off guard.

Self-encapsulation is possible but challenging

“Can I DIY vapor barrier in crawlspace hello, recent home buyer here.”➕

“If you are up for the work, do it yourself.”➕

“I value my time....but I'm paying somebody next go around bc my back hurt for a week and a half after and fuck that.”➕

“Yes you can self encapsulate.”➕

Challenges with adhering vapor barriers to certain wall materials

“Help! Trying to seal vapor barrier and NOTHING will stick to walls in crawl space.”➕

“Scuff up the surface you want to adhere to so there's more surface area for the floor to stick to.”➕

“it doesn't make sense not to secure it.”➕

Debate on necessity of additional sealing techniques

“#3 seems excessive to me.”➕