--- product_id: 265489350 title: "LLPT Butyl Seal Putty Tape | 1 Pack Black | 3MM Thick x 25MM Wide x 10M Long | Water Tight Seal Butyl Tape | for Leak Proof RV Repair Window Glass Boat Sealing EPDM Roof Patching (BST233)" brand: "llpt" price: "$73.47" currency: USD in_stock: true reviews_count: 13 category: "Llpt" url: https://www.desertcart.us/products/265489350-llpt-butyl-seal-putty-tape-1-pack-black-3mm-thick store_origin: US region: United States of America --- # 10 meters long for extensive coverage Waterproof & airtight protection 3.5mm thick for durable sealing LLPT Butyl Seal Putty Tape | 1 Pack Black | 3MM Thick x 25MM Wide x 10M Long | Water Tight Seal Butyl Tape | for Leak Proof RV Repair Window Glass Boat Sealing EPDM Roof Patching (BST233) **Brand:** llpt **Price:** $73.47 **Availability:** ✅ In Stock ## Summary > 🔧 Seal it once, seal it right — the ultimate waterproof tape for pros who settle for nothing less! ## Quick Answers - **What is this?** LLPT Butyl Seal Putty Tape | 1 Pack Black | 3MM Thick x 25MM Wide x 10M Long | Water Tight Seal Butyl Tape | for Leak Proof RV Repair Window Glass Boat Sealing EPDM Roof Patching (BST233) by llpt - **How much does it cost?** $73.47 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/265489350-llpt-butyl-seal-putty-tape-1-pack-black-3mm-thick) ## Best For - llpt enthusiasts ## Why This Product - Trusted llpt brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Value-Packed Length:** Double the length of competitors at 10 meters—more tape, more projects, more savings. - • **Weatherproof Warrior:** Withstands rain, wind, dust, oil, and corrosive chemicals to keep your RV, boat, or roof leak-free. - • **Effortless Application:** Moldable and mess-free tape that adapts instantly to any shape, making DIY repairs a breeze. - • **Precision Seal Mastery:** Ultra-sticky butyl rubber ensures one-time perfect placement—no second chances, just flawless sealing. - • **Versatile Surface Compatibility:** Bonds seamlessly to glass, metal, plastic, wood, and more—even on jagged or curved surfaces. ## Overview LLPT Butyl Seal Putty Tape is a 3.5mm thick, 25mm wide, and 10-meter long synthetic rubber tape designed for airtight, waterproof sealing on diverse surfaces including glass, metal, plastic, and wood. Engineered for high adhesion and elasticity, it resists weather, chemicals, and physical stress, making it ideal for RV repairs, window sealing, boat maintenance, and roof patching. Its moldable, mess-free application and superior length offer unmatched value and reliability for professional-grade DIY and commercial use. ## Description LLPT Butyl Seal Putty Tape | 1 Pack Black | 3MM Thick x 25MM Wide x 10M Long | Water Tight Seal Butyl Tape | for Leak Proof RV Repair Window Glass Boat Sealing EPDM Roof Patching (BST233) : desertcart.co.uk: DIY & Tools Review: Great stuff - Great product, sticks well and should be waterproof. We'll see! Review: Sticky, sticky..... - I usually buy a mastic based sealant to seal my Motorhome roof windows, after a recommendation from a friend I looked at the Butyl strips as an alternative, the other 'Named' brands were a 5 meter roll for roughly the same cost as this item but this one has 10 meters on the roll so better value straight away. Still a bit sceptical, I installed the tape on the roof and Ohh my word, it sticks, I mean, it really sticks, when you use this you only get one chance to get it right, so be precise and certain you have everything lined up correctly. The window has been fitted and it has sealed perfectly, there was heavy rain that evening and there were no leaks at all. Highly recommend this tape and I certainly won't be going back to the mastics. ## Features - APPLICATION: Widely used for window and door waterproof reinforcement, airtight sealing, windshield, RV, retrofit, pipe, joint sealing, mobile home, glass, EPDM roof or galvanized metal roofing patching for indoor and outdoor. - WORKING PATTERNS: Suitable to be use on glass, fiberglass, wood, coated or uncoated metals, plastic, rubber at tight corners, unusual curves, uneven and most jagged surfaces; reliably shut off wind, water, dust, oil, grease, vapor, moisture, corrosive chemical and other leakages; paintable feature is making your installation area a seamless, clean, dry and heavy duty water tight workspace. - FEATURES: LLPT Butyl Putty Tape (3.5mm/0.14 inch thick) is made of synthetic composited rubber for non-drying, non-hardening and extremely working temperature that provides easy installation, easy forming, quick molding, shock-absorbing, mess free, air tight sealing, waterproof, high viscosity and elasticity. - EASY TO USE: LLPT Sealant Putty Tape delivers easy molding and instant adhesion to the surface of object. Simply clean the surface first for better bonding and release the butyl tape to areas you want to seal with proper press all around the tape. The ideal installation temperature is around 10 Celsius degree, to low will make the tape stiffer which might need a little bit longer time for molding. - LLP-TAPES: LLPT produces various tapes for industrial and commercial use with ideal sizes and thickness based on the desires of users. Search on desertcart for other LLPT tapes like PET Repair Tape, Woodworking Tape, Aluminum Foil Tape, Foam Tape, Black/Gray/Clear Acrylic Mounting Tape, Duct Tape, Silicone Tape, Caulking Tape, Gaffer Tape and so on. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0822FNHFQ | | Best Sellers Rank | 6,328 in DIY & Tools ( See Top 100 in DIY & Tools ) 9 in Butyl Tape | | Brand | LLPT | | Colour | 1 X Black | | Compatible Material | Metal, Plastic, Wood | | Country Of Origin | China | | Customer Reviews | 4.5 4.5 out of 5 stars (2,611) | | Item Dimensions L x W x Thickness | 25W x 4Th millimetres | | Item Thickness | 3.5 Millimetres | | Manufacturer | LLPT | | Material | Rubber | | Number of Items | 1 | | Other Special Features of the Product | Waterproof | | Size Name | 25MM X 10M | | Surface Recommendation | Glass, Metal, Plastic, Wood | | Tensile Strength | 17 Pounds Per Inch | | UPC | 791306423432 | | Unit Count | 10 Meter | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** LLPT - **Colour:** 1 X Black - **Material:** Rubber - **Number of items:** 1 - **Special feature:** Waterproof ## Images ![LLPT Butyl Seal Putty Tape | 1 Pack Black | 3MM Thick x 25MM Wide x 10M Long | Water Tight Seal Butyl Tape | for Leak Proof RV Repair Window Glass Boat Sealing EPDM Roof Patching (BST233) - Image 1](https://m.media-amazon.com/images/I/71eks9LEIlL.jpg) ## Available Options This product comes in different **Size, Style** options. ## Questions & Answers **Q: Does this product have a smell? Does it off gas?** A: I used it outside, and did not notice any smell. **Q: good for sealing taillight lens on my camper ?** A: If you're sealing between the lens and the body, yeah, it would work. This is kind of like a tar compound...it is flexible and sticky so kind of think along the lines of pushing some chewing gum in a crack. It's not going to be pretty when the bulb burns out and you have to remove the lens to change it, there's going to be some residue left. but it will seal up the crack for sure. **Q: Is this for RV skylight?** A: It should work great for an RV skylight. I use it to seal windows on boats so you should be fine. **Q: If I apply this in sub-50F degree weather, does adhesion improve when temps go up? I'm using it under a solar panel mounting bracket, with screws.** A: Do you mean below 50F or did you mean minus 50 F? It took me a minute to figure it out. I assume you mean below 50 but not minus 50. Anyway yes to your question if it's below 50 but if it's minus 50 I'm not sure how it would hold up to apply. As in frozen state it might be brittle and getting the film off it might also be difficult. Anyway our temps here in NW MT have surprised us and warmed up above 50 in May nicely and that includes evenings. Often if you are in a warm climate you need to put in the fridge for a day or even freezer for a few hours to help you manage the properties of the butyl caulking. Think of this as a line of caulking in tape form because that's basically what it is. Also some people use two layers and over lap ends when they come together well beyond just a smidge think more like an inch or more overlap. It can spread out a bit. Good luck with your projects and some people like to apply in cooler temps because it can be easier to handle. But way below freezing probably NOT. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great stuff *by R***R on 12 February 2026* Great product, sticks well and should be waterproof. We'll see! ### ⭐⭐⭐⭐⭐ Sticky, sticky..... *by L***R on 3 January 2025* I usually buy a mastic based sealant to seal my Motorhome roof windows, after a recommendation from a friend I looked at the Butyl strips as an alternative, the other 'Named' brands were a 5 meter roll for roughly the same cost as this item but this one has 10 meters on the roll so better value straight away. Still a bit sceptical, I installed the tape on the roof and Ohh my word, it sticks, I mean, it really sticks, when you use this you only get one chance to get it right, so be precise and certain you have everything lined up correctly. The window has been fitted and it has sealed perfectly, there was heavy rain that evening and there were no leaks at all. Highly recommend this tape and I certainly won't be going back to the mastics. ### ⭐⭐⭐⭐ Great stuff. *by C***H on 11 February 2026* Good stuff, did the job. Worth knowing that if using in any kind of situation where it is squeezed under tension and left over time (I used it for mounting boat rubbing strakes) that it will continue to squeeze out in areas, particularly in hot weather. ## Frequently Bought Together - LLPT Butyl Tape Black 1 Inch x 33Ft Tight Seal for Leak Proof EPDM RV Repair Window Glass Boat Sealing Roof Pipe Patching(BST233) - Dicor 501LSW-1 HAPS-Free Self-Leveling Lap Sealant for horizontal surfaces - 10.3 Oz, White, Secure, Ideal for RV Roofing, Maintenance, Repair, Appliance Application - RecPro 8x1 Pan Head Metal RV Screws | Polar White | Multi-Pack | RV Interior Screws | Factory Finished Looked | (50) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/265489350-llpt-butyl-seal-putty-tape-1-pack-black-3mm-thick](https://www.desertcart.us/products/265489350-llpt-butyl-seal-putty-tape-1-pack-black-3mm-thick) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-04-27*