--- product_id: 1889802 title: "EternaBond RoofSeal White 4\" x50' MicroSealant UV Stable RV Roof Seal Repair Tape | 35 mil Total Thickness - EB-RW040-50R - One-Step Durable, Waterproof and Airtight Sealant" brand: "eternabond" price: "$169.80" currency: USD in_stock: true reviews_count: 13 category: "Eterna Bond" url: https://www.desertcart.us/products/1889802-eternabond-roofseal-white-4-x50-microsealant-uv-stable-rv-roof store_origin: US region: United States of America --- # UV-stable backing resists sun damage Flexible down to -57°C (-70°F) 35 mil thickness for rugged durability EternaBond RoofSeal White 4" x50' MicroSealant UV Stable RV Roof Seal Repair Tape | 35 mil Total Thickness - EB-RW040-50R - One-Step Durable, Waterproof and Airtight Sealant **Brand:** eternabond **Price:** $169.80 **Availability:** ✅ In Stock ## Summary > 🛡️ Seal it once, forget leaks forever! ## Quick Answers - **What is this?** EternaBond RoofSeal White 4" x50' MicroSealant UV Stable RV Roof Seal Repair Tape | 35 mil Total Thickness - EB-RW040-50R - One-Step Durable, Waterproof and Airtight Sealant by eternabond - **How much does it cost?** $169.80 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/1889802-eternabond-roofseal-white-4-x50-microsealant-uv-stable-rv-roof) ## Best For - eternabond enthusiasts ## Why This Product - Trusted eternabond brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Mess-Free Application:** Forget messy solvents or trays—easy peel-and-stick tape with a strong adhesive that sticks on the first try. - • **UV-Resistant Durability:** Industry-leading UV-stable backing prevents deterioration from sun exposure and temperature swings. - • **One-Step Waterproof Seal:** No extra sealant needed—just peel, stick, and roll for an airtight, moisture-proof barrier. - • **Versatile Surface Bonding:** Bonds seamlessly to EPDM, TPO, metal, wood, fiberglass, and more—perfect for RVs, trailers, boats, and metal buildings. - • **Extreme Weather Flexibility:** Remains flexible and crack-resistant in freezing temps down to -57°C (-70°F), ensuring long-lasting protection. ## Overview EternaBond RoofSeal White is a premium 4" x 50' MicroSealant tape with 35 mil thickness, designed for durable, waterproof, and airtight sealing on RV roofs, metal buildings, and more. Its advanced MicroSealant adhesive and aluminum backing create a flexible, UV-resistant barrier that withstands extreme temperatures down to -57°C (-70°F). Trusted by thousands for long-term leak protection, this one-step tape eliminates the need for additional sealants, making repairs quick, clean, and reliable. ## Description Product description RoofSeal One step PERMANENT repair system for all roofs & roof accessories UV Stable AlumiBond 4 mil aluminum backing for heavy duty applications Great for drain pans, tanks, troughs Creates moisture barrier WebSeal Maximum conformability for irregular surfaces Designed to hold all roof coatings, sealers, or paint Fabric backing Perfect for making all roofs/surfaces watertight before coating is applied Easy & permanent solution for sealing flex duct systems Restores drain pans DoubleStick For use between two surfaces including dissimilar surface materials Twist into rope and use to fill voids, gaps and holes Good for night tie offs WindowSeal Flexible, conformable window wrap that requires no screws, staples, or anchors to bond with any of these surfaces: Brick, wood, OSB, concrete, stucco, building wraps, plastic, vinyl, aluminum, & metal Great for cold weather applications EternaPrime Specially formulated to work with EternaBond MicroSealant tapes Creates a stable surface for installation of EternaBond tapes Prepares challenging surfaces for repair (old tar, gravel, oxidized and rusty surfaces, brick, mortar, etc.) Allows installation of EternaBond tapes to -20°F Can be used over talc and on new EPDM What is MicroSealant? MicroSealants are a family of sealants that contain no double bonds between carbon atoms, but are comprised of a single bond between carbon atoms which result in a molecular structure that is extremely stable and is resistant to oxygen, ozone, and heat. MicroSealant tapes are formulated from synthetic polymers and contain a proprietary built-in primer that facilitates instant bonding to most known materials used in: transportation, roofing and the traditional building envelope. MicroSealants have an extremely wide temperature tolerance. When properly installed, MicroSealants will bond to almost any selected substrate, resulting in a waterproof seal. MicroSealants are self-healing. MicroSealants are extremely robust to a wide range of surface condition reducing steps during installation. MicroSealant - contains no solvents due to its completely VOC-free proprietary primer and will not compromise air quality within the building envelope. Why Use EternaBond? EternaBond bonds to virtually any surface except silicone. This includes all roofing materials, brick, wood, metal, stucco, rubber, vinyl, canvas, etc. So EternaBond is the perfect repair product for buildings, RV's, tents, sheds, canoes, tarps, etc. Also, EternaBond has an expected life (depending on where you live) of 18-35 years exposed to the weather. EternaBond has a 5-year shelf life so if you don't use it all at once it will be ready when you need it. Finally, EternaBond is the choice of professional RV mechanics, roofing technicians and professional maintenance mechanics. What makes EternaBond different? EternaBond is a MicroSealant. MicroSealant has a unique molecular structure which makes them extremely stable, almost invisible to the degrading effects of nature, resulting in extremely long repairs and shelf life. This unique structure also makes all EternaBond tapes compatible with almost all other materials except silicone. Review: Worked Fantastically - The roof of my enclosed trailer started leaking. The 12 year old factory sealant used under the trim had finally given up. After removing all the trim I found how poorly the trailer was constructed. They used rivets every 8-9 inches or so which left a lot of the aluminum skin buckled up; and would have been difficult, if not impossible, to seal. I added a couple hundred additional rivets to make everything smooth, then cleaned all the areas that were going to receive the Eternabond tape. Application is straight forward and easy. Be warned, you need to plan ahead, have a helper if you need one, you only get one shot at placing the tape. After you get it down give it a good rolling. It also worked great on the top-to-side 90° transition; just place it on one surface, roll it to adhere it, then fold it over and roll some more. Pro's: Ease of use, durability, adhesion, quality. This will forever be my goto solution for trailer roof leak repairs. Con's: None really. There is a learning curve to using it but if you've got two brain cells to clank together to make a spark you'll be able to figure it out. Review: Great, but within reason. - Works at the transistion points of the roof of a RV well, I wish you could peal the backing off once firmly pressed in place, leaving just the tar substrate. The backing makes it "waterproof" but future leaks around the tape and the issue that the outer coating is slippery. Very little will stick to the outer coating of the tape but does stick very well to the RV surface. Lap sealant will not adhere to the tape covering so if future repairs are required it is a real pain. ## Features - MULTI-USE: Perfect for use on metal buildings, trailer/RV roofs and sides, drain pans, drain pipes, boats, canoes. bonds to a wide range of surfaces including roof materials such as EPDM, TPO, Hypalon, aluminum, galvanized steel, wood, and fiberglass. - NO ADDITIONAL SEALING REQUIRED: Aluminum backing, combined with a layer of advanced MicroSealant, creates a waterproof, moisture, and air tight barrier with no additional sealing required that remains flexible to -57°C (-70°F) - DURABLE SURFACE: Industry leading one step repair system that creates a protective coating for surfaces that require abrasion and corrosion resistance - EXCELLENT UV RESISTANCE: Tape features a durable and UV-stable backing that withstands deterioration in fluctuating temperatures and direct sun exposure - EASY TO USE: Simple and quick one-step repair, using sticky tape with no trays or messy solvents to clean up after the project completion, and no other adhesive needed ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B002RSIK4G | | Adhesive Format | Tape | | Adhesive Location | Integrated into the tape | | Adhesive Side Count | 1 | | Best Sellers Rank | #457 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #37 in Adhesive Tapes | | Brand | EternaBond | | Brand Name | EternaBond | | Color | White | | Compatible Material | Alloy Steel, Aluminum, Metal, Wood | | Customer Reviews | 4.8 out of 5 stars 13,988 Reviews | | Foil Thickness | 0.04 Inches | | Global Trade Identification Number | 00700115575805, 00891991000533 | | Included Components | Unit^Instruction Guide | | Item Dimensions L x W x Thickness | 600"L x 4"W x 0.04"Th | | Item Resistance | waterproof | | Item Thickness | 0.04 Inches | | Item Type Name | EternaBond RSW-4-50 RoofSeal Sealant Tape, White - 4" x 50' | | Item Weight | 3.5 Pounds | | Manufacturer | EternaBond | | Material | MicroSealant Adhesive Tape | | Material Type | MicroSealant Adhesive Tape | | Model | RSW-4-50 | | Number of Items | 1 | | Other Special Features of the Product | Durable | | Part Number | RSW-4-50R | | Recommended Uses For Product | Multipurpose | | Size Name | 4" x 50' | | Special Feature | Durable | | Surface Recommendation | Metal | | Tensile Strength | 50 Pounds | | UPC | 700115575805 891991000533 | | Unit Count | 50 Feet | | Warranty Description | Please contact us if you experience any issues within 30 days of receipt. | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** EternaBond - **Color:** White - **Material:** MicroSealant Adhesive Tape - **Number of Items:** 1 - **Recommended Uses For Product:** Multipurpose ## Images ![EternaBond RoofSeal White 4" x50' MicroSealant UV Stable RV Roof Seal Repair Tape | 35 mil Total Thickness - EB-RW040-50R - One-Step Durable, Waterproof and Airtight Sealant - Image 1](https://m.media-amazon.com/images/I/81x5QLJK+GL.jpg) ![EternaBond RoofSeal White 4" x50' MicroSealant UV Stable RV Roof Seal Repair Tape | 35 mil Total Thickness - EB-RW040-50R - One-Step Durable, Waterproof and Airtight Sealant - Image 2](https://m.media-amazon.com/images/I/81efxXQE1fL.jpg) ![EternaBond RoofSeal White 4" x50' MicroSealant UV Stable RV Roof Seal Repair Tape | 35 mil Total Thickness - EB-RW040-50R - One-Step Durable, Waterproof and Airtight Sealant - Image 3](https://m.media-amazon.com/images/I/514Ou4DCxPL.jpg) ![EternaBond RoofSeal White 4" x50' MicroSealant UV Stable RV Roof Seal Repair Tape | 35 mil Total Thickness - EB-RW040-50R - One-Step Durable, Waterproof and Airtight Sealant - Image 4](https://m.media-amazon.com/images/I/512aU1Z0iJL.jpg) ![EternaBond RoofSeal White 4" x50' MicroSealant UV Stable RV Roof Seal Repair Tape | 35 mil Total Thickness - EB-RW040-50R - One-Step Durable, Waterproof and Airtight Sealant - Image 5](https://m.media-amazon.com/images/I/41RdounHZhL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Questions & Answers **Q: Can this product be coated/covered with the Liquid Roof EPDM product?** A: My seams on my Motorhome were sealed with this product 10 yrs ago. My roof was recoated with EPDM rubber roof in a bucket three years ago. No problem thus far. **Q: Has anyone used this on galvanized metal roofing? Lots of seams!! Some have been caulked with silicone..** A: I used this sealant on a galvanized camper roof at the numerous seams that were previously coated with silicone. I made sure that I centered the silicone with the sealant. I was worried but took the chance that there would not be a reaction between the two products. it has been two years now and the roof is still fine **Q: What size is the roll of tape** A: The tape is 4 inches wide by 50 feet long. There are three sizes to choose from, 2" x 50' long, 4" x 50' long or 6 inches wide by 50 feet long. It's designated on the packaging as 2-50, 4-50 and 6-50. Works great. You can put it on and done! When you use lap sealants by Dicor or other makers they take up to a month to fully cure. **Q: Would this be good for a large mobile home roof ?** A: I think it would be good to use on any camper or mobile home roof to help stop a leak, especially at a seam, but it would also be a good idea to seal around the edges of the EternaBond with a bead of DiCor sealant. That's what I did on my aluminum camper roof and it worked like a charm. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Worked Fantastically *by S***K on July 31, 2025* The roof of my enclosed trailer started leaking. The 12 year old factory sealant used under the trim had finally given up. After removing all the trim I found how poorly the trailer was constructed. They used rivets every 8-9 inches or so which left a lot of the aluminum skin buckled up; and would have been difficult, if not impossible, to seal. I added a couple hundred additional rivets to make everything smooth, then cleaned all the areas that were going to receive the Eternabond tape. Application is straight forward and easy. Be warned, you need to plan ahead, have a helper if you need one, you only get one shot at placing the tape. After you get it down give it a good rolling. It also worked great on the top-to-side 90° transition; just place it on one surface, roll it to adhere it, then fold it over and roll some more. Pro's: Ease of use, durability, adhesion, quality. This will forever be my goto solution for trailer roof leak repairs. Con's: None really. There is a learning curve to using it but if you've got two brain cells to clank together to make a spark you'll be able to figure it out. ### ⭐⭐⭐⭐⭐ Great, but within reason. *by P***4 on April 27, 2026* Works at the transistion points of the roof of a RV well, I wish you could peal the backing off once firmly pressed in place, leaving just the tar substrate. The backing makes it "waterproof" but future leaks around the tape and the issue that the outer coating is slippery. Very little will stick to the outer coating of the tape but does stick very well to the RV surface. Lap sealant will not adhere to the tape covering so if future repairs are required it is a real pain. ### ⭐⭐⭐⭐⭐ Excellent product *by L***N on June 7, 2021* Many have used this product to repair tears in their RV rubber roofs, Even on metal. As long as you follow instructions this product is outstanding as far as adhesion and protection for water intrusion. I bought several rolls in 2006 after purchasing a new travel trailer. I bought a quart of acetone to clean the surfaces that I applied the tape. I covered all the perimeter of the travel trailers roof. Generally the rubber is attached via the rain gutter. There are screws every few inches holding the rubber down and the gutter on. Im my mind, these are all potential leak points. As the saying goes, it's not if your RV leaks, but when. I experienced this with a prior RV even after diligent cleaning and caulking of seams. I did all edges and seams on the roof. All roof vents and even used a pieces underneath the crank up antenna. The product has held up outstanding for the 15 years it has been in place. No leaks. Here are some tips/ thoughts about the product and process; Do not over apply the acetone, just wipe the area and let dry. Once you pull the backing off the tape, be careful. The product sticks very very well. Use a J roller to roll the tape down after applying. Once down, you will not get it off easily. My method was to clean the inside of the guttter and the edge of the rubber roof, I applied the product inside the back edge of the gutter, to cover the screws, and then fold over onto the roof. roll it down. I did front and rear seams where metal siding meets rubber roof. I cannot see any of this work from the ground. I cannot think of anything one can do any better to protect roof seams, than using this product. I will do any trailer I may own in the future. It is not inexpensive, but it has done an outstanding job and no seams have loosened, torn, or failed. Very happy with this product. ## Frequently Bought Together - ETERNABOND RSW450 - Thetford RV Toilet Seal Lube and Conditioner - Toilet Seal Lubricant - 24 oz 36663 - Valterra T58 Twist-On Waste Valve, Mess-Free Waste Valve for RV's, Campers, Trailers --- ## 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/1889802-eternabond-roofseal-white-4-x50-microsealant-uv-stable-rv-roof](https://www.desertcart.us/products/1889802-eternabond-roofseal-white-4-x50-microsealant-uv-stable-rv-roof) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-15*