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🔧 Seal smarter, not harder — the ultimate tape for pros who demand perfection.
XFasten Butyl Sealing Tape is a high-performance, black EDPM rubber tape measuring 1/8” thick by 3/4” wide and 30 feet long. Rated for 350 PSI tensile strength and resistant to water, chemicals, and temperatures up to 290°F, it delivers a reliable, mess-free, watertight seal across multiple surfaces including metal, wood, plastic, and concrete. Trusted by thousands with a 4.7-star rating, it’s the go-to solution for RV, marine, plumbing, and construction sealing needs.















| ASIN | B06WLQ3WLS |
| Adhesive Format | Tape |
| Adhesive Location | One side |
| Adhesive Side Count | 2 |
| Best Sellers Rank | #1,639 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #3 in Butyl Tape |
| Brand | XFasten |
| Brand Name | XFasten |
| Color | Black |
| Compatible Material | Metal, Rubber, Plastic, Pvc, Glass, Wood, Polycarbonate |
| Customer Reviews | 4.7 out of 5 stars 2,780 Reviews |
| Foil Thickness | 0.13 Inches |
| Included Components | 1/8 Inch Thick Butyl Tape, Adhesive Backing |
| Item Dimensions L x W x Thickness | 0.75"L x 0.75"W x 0.13"Th |
| Item Resistance | waterproof, chemical resistant, leak resistant |
| Item Thickness | 0.13 Inches |
| Item Weight | 2.4 Ounces |
| Manufacturer | XFasten |
| Material | Butyl Rubber |
| Material Type | Butyl Rubber |
| Model | BST3430 |
| Number of Items | 1 |
| Other Special Features of the Product | Adjustable, Mess Free |
| Part Number | BST3430 |
| Recommended Uses For Product | Electrical, Indoor, Outdoor, Plumbing |
| Size Name | 1/8" x 3/4" x 30', Single Pack |
| Special Feature | Adjustable, Mess Free |
| Surface Recommendation | Concrete, Metal, Plastic, Wood |
| Tensile Strength | 350 Pounds Per Square Inch |
| UPC | 602401715660 |
| Unit Count | 30.0 Feet |
| Upper Temperature Rating | 290 Degrees Fahrenheit |
| Warranty Description | Manufacturer warranty for 90 days from date of purchase |
| Water Resistance Level | Waterproof |
A**.
Nice and easy to use. Works well
It’s as described. Pretty pliable and soft but not like putty. Stretches easily it should work for your needs were it is required for this product. Metal to metal on my old car works fine. Weather strip Chanel tracks ect. Came in a nice roll. Packing was very nice. Easy to use product. Cool area I used it in around 60 degrees. No mess.
B**N
If your unsure. It's definitely worth it
About this to install a fan in the bathroom of my camper. I instantly tested to see if it was waterproof before I added my Henry's tropicool sealant on top. It worked perfect I left the water hose on the roof with water hitting Butly tape directly no water penetration whatsoever before I even put the screws to tighten it down this stuff is amazing. It's incredibly sticky and the thickness was exactly as described
R**N
sticky leak proof stuff
very good and strong sealant tape for vents and anything you want to keep water out very sticky i have used butyl tape on many things and none leaked.highly recommended.
I**E
Worked OK underneath RV roof parts
I use this up underneath some RV parts that I installed along with the screws. It seemed to do OK.
D**H
Easy to use and seals well, great product!
Great product and flexible enough to do the sealant jobs I needed. I ought for my RV to install some additional solar panels and place under my slam lock catch that had a leak. I can already see a few other places I can use it so imagine it will just stay in my camper for some emergency situations.
J**N
Quality and price
I am a window glazer and use butyl tape all the time. This is really good stuff and a great value. I did not use this for glass but for car audio sound deadening to reduce resonance and rattles everywhere hard surfaces move and make contact. I also use it as an adhesive on many things.
L**C
Great product, well packaged
Bought this to replace a similar item that arrived in a much bigger kit for a self-build shed which had melted into a sticky mess during shipping. This product was well packaged , even to the point of being enclosed in a circle of polystyrene to stop it rattling around inside the box, so it arrived in perfect shape. It unrolled easily and smoothly for application - best if one person holds the roll and the other applies it to the surface as it is very, very sticky which you want it to be for its purpose! It was easy to cut with scissors - best done with the paper backing still on. Would recommend.
R**L
Excellent product to use n marine environments
Excellent waterproof product for sealing safety glass into stainless steel frames for boat portals. Stays soft and pliable in very cold temps. I tested this down to -10 F and still extremely adhesive and pliable. Easy to work with.
J**N
Handy to have
awesome product
C**T
Good Product
Quick delivery, item as described, happy
T**Y
Worked exactly as expected.
Can't ask for more than that!
G**O
Très utile pour l’étanchéite
Très utile pour l’installation de fenêtres et portes de VR ou remorques fermées
P**S
Pricey but efficient at blocking leaks for metal roofs.
This is a pricey but efficient product for eliminating leaks in metal roofs. I couldn't stop water dripping through the aluminum Yardistry gazebo roof, no matter what kind of sealant I used. Was applying new specialized roofing products two seasons in a row until I read about this tape. It was not easy to apply but it seemingly finally resolved the issue. If I ever have to assemble a metal gazebo roof again, I will install this product from the get-go.
Trustpilot
2 months ago
2 days ago