--- product_id: 302753549 title: "Poly Welder Pro Polyethylene Welding Strips - 5-feet (Black)" brand: "rainflo" price: "€ 33.20" currency: EUR in_stock: true reviews_count: 5 category: "Rain Flo" url: https://www.desertcart.be/products/302753549-poly-welder-pro-polyethylene-welding-strips-5-feet-black store_origin: BE region: Belgium --- # Black color for seamless repairs 12-inch strip length Durable LDPE polyethylene material Poly Welder Pro Polyethylene Welding Strips - 5-feet (Black) **Brand:** rainflo **Price:** € 33.20 **Availability:** ✅ In Stock ## Summary > ⚡ Weld it. Fix it. Forget it. Invisible strength for your toughest repairs. ## Quick Answers - **What is this?** Poly Welder Pro Polyethylene Welding Strips - 5-feet (Black) by rainflo - **How much does it cost?** € 33.20 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/302753549-poly-welder-pro-polyethylene-welding-strips-5-feet-black) ## Best For - rainflo enthusiasts ## Why This Product - Trusted rainflo brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Universal Compatibility:** Works flawlessly on water tanks, kayaks, ATV fenders, and more—trusted by top brands like Norwesco and Poly-Mart. - • **Molecular Strength Bonding:** LDPE’s unique molecular structure ensures a high-strength, long-lasting weld that adhesives can’t match. - • **Ready-to-Use 5-Foot Length:** Generous strip length means fewer interruptions and faster project completion—get it done right the first time. - • **Versatile Application Range:** Ideal for automotive, agricultural, and recreational gear repairs—keep your essentials running smoothly. - • **Invisible Repairs, Maximum Impact:** Black strips blend perfectly with most polyethylene surfaces for discreet, professional fixes. ## Overview Poly Welder Pro offers 5 feet of black LDPE polyethylene welding strips, each 12 inches long, 1/16 inch thick, and 3/8 inch wide. Designed for seamless, durable repairs on a wide range of polyethylene surfaces including water tanks, automotive parts, and outdoor gear. Its molecularly engineered LDPE material ensures superior weld strength where adhesives fail, making it the go-to solution for professional-grade polyethylene repairs. ## Description The color of these strips will match many polyethylene applications like plastic water tanks, canoes and kayaks where you need a more invisible repair. These strips can be used to repair most water tanks manufactured by Norwesco, Poly-Mart, Ace Rotomold, Snyder, Den Hartog, Dura-Cast, Custom Roto Mold, Waterwall and almost all other polyethylene water tank manufacturers. Polyethylene is also used in automotive applications like windshield washer bottles and radiator overflow tanks. It is also used on ATV fenders, small watercraft, motor home water tanks, dirt bike fenders, gas tanks and agricultural water/fertilizer tanks. Polyethylene is very stable (meaning few things will react with it), which is why it is almost impossible to get quality repairs using adhesives, and also why it is used to contain chemicals (gasoline, pesticides, etc.) that would react with other plastics. Welding is the best repair method for polyethylene. A high degree of molecular branching with long chains gives molten LDPE unique and desirable flow properties, making it easier to work with while producing a high-strength and durable bond for both LDPE and HDPE welds. The BLACK color of this rod will match many BLACK polyethylene applications where you need a more invisible repair. This package contains 5 ft. of BLACK polyethylene strips. These polyethylene strips are 12" long and approximately 1/16" thick and 3/8" wide. Review: How to successfully weld plastic.... - Poly Welder Pro Polyethylene Welding Strips - 5-feet (Black) The product I purchased was the black LDPE strips not the green or white. I have an older motorhome with black low density polyethylene holding tanks for both the black and grey water. The whole key to successfully plastic welding any of these tanks is finding out what the tanks are made of. In most cases the recycling symbol on the tank, usually a triangle with a number, will indicate what it is made of. In order to successfully weld plastic you must use a welding rod of either the same density as the tank, or welding rod of a lower density than the tank. In my case LDPE worked perfectly. Both tanks had stress cracks in multiple places from the metal bars and bolts that were used to bolt the tanks up to the floor of the motorhome. I did not remove the tanks when doing this. Both of these tanks were bone dry when I did the welding. First I tried using a very small triangular shaped iron to do it but it did not get hot enough to melt the plastic to a state of flow. At that point I just grabbed my propane torch, set it to approximately a 0.5 inch or shorter flame and applied it to both the tank and the rod at the same time. You can see the plastic melt both surfaces and they effectively became one solid piece of plastic. Grab the flat welding rod several inches above the end of it and apply a bend to it trying to flatten it out to the surface of the tank. Put the flame right where the 2 surfaces meet and it will become evident that they are melting together. Be light with the flame. If you hold it too long to that area you could melt it more than you need to. This also will become self-evident. You will become better at this type of welding quickly as you do it. The results were phenomenal. No leaks at all. Tested by filling both tanks up with water as the motorhome sat on our concrete driveway. The additional material that I added to the tanks seemed to increase the strength of the tank by making the tank thicker in that area. I don't anticipate ever having to do this again. It sure worked like a charm. Review: Hard To Find Item At A Good Price - I needed these to repair a cracked stock tank. The material worked really well. ## Features - These LDPE polyethylene strips are 12" long and approximately 1/16" thick and 3/8" wide - The colors of these strips will match many applications like plastic water tanks, canoes and kayaks - Can be used to repair most water tanks like Norwesco, Poly-Mart, Ace, Snyder, Dura-cast, etc. - Also used to repair windshield washer bottles, radiator overflow tanks, ATV fenders, watercraft - Use to repair motor home water tanks, dirt bike fenders, gas tanks and agricultural water tanks ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00VMGO1K6 | | ASIN | B00VMGO1K6 | | Batteries Included? | No | | Batteries Required? | No | | Color | Black | | Customer Reviews | 4.4 4.4 out of 5 stars (156) | | Customer reviews | 4.4 4.4 out of 5 stars (156) | | Date First Available | 10 August 2016 | | Date First Available | 10 August 2016 | | Is Discontinued By Manufacturer | No | | Item Package Quantity | 1 | | Item Weight | 32 g | | Item model number | 36223 | | Item model number | 36223 | | Manufacturer | RainFlo | | Manufacturer | RainFlo | | Material | LDPE polyethylene | | Part number | 36223 | | Product Dimensions | 30.48 x 2.54 x 2.54 cm; 32 g | | Product Dimensions | 30.48 x 2.54 x 2.54 cm; 32 g | ## Images ![Poly Welder Pro Polyethylene Welding Strips - 5-feet (Black) - Image 1](https://m.media-amazon.com/images/I/61hJ+tEjjuL.jpg) ## Questions & Answers **Q: Can I get this in Tan?** A: Yes, it is available to purchase in Sand/Tan color, it is available on Amazon in the link below: https://www.amazon.com/dp/B07NPX27H9?ref=myi_title_dp We also sell this color in the Poly Welder Pro kit: https://www.amazon.com/dp/B07N1YHQTH?ref=myi_title_dp **Q: Is "natural" white or clear?** A: It is closer to white in color. **Q: Can I screw a screw in it after filling screw stripped hole?** A: It may or may not work, this item is not intended to be used in this manner, it is intended for repairing small holes or tears in plastic, like water tanks as an example. **Q: Can these green plastic rods be used to repair cracks in John Deere lawn tractor hood?** A: you would need to know the material used to make the hood. The rods are polyethylene, so the hood would need to be the same, polyethylene. they may cover a crack but no bonding. ## Customer Reviews ### ⭐⭐⭐⭐⭐ How to successfully weld plastic.... *by T***N on 16 August 2016* Poly Welder Pro Polyethylene Welding Strips - 5-feet (Black) The product I purchased was the black LDPE strips not the green or white. I have an older motorhome with black low density polyethylene holding tanks for both the black and grey water. The whole key to successfully plastic welding any of these tanks is finding out what the tanks are made of. In most cases the recycling symbol on the tank, usually a triangle with a number, will indicate what it is made of. In order to successfully weld plastic you must use a welding rod of either the same density as the tank, or welding rod of a lower density than the tank. In my case LDPE worked perfectly. Both tanks had stress cracks in multiple places from the metal bars and bolts that were used to bolt the tanks up to the floor of the motorhome. I did not remove the tanks when doing this. Both of these tanks were bone dry when I did the welding. First I tried using a very small triangular shaped iron to do it but it did not get hot enough to melt the plastic to a state of flow. At that point I just grabbed my propane torch, set it to approximately a 0.5 inch or shorter flame and applied it to both the tank and the rod at the same time. You can see the plastic melt both surfaces and they effectively became one solid piece of plastic. Grab the flat welding rod several inches above the end of it and apply a bend to it trying to flatten it out to the surface of the tank. Put the flame right where the 2 surfaces meet and it will become evident that they are melting together. Be light with the flame. If you hold it too long to that area you could melt it more than you need to. This also will become self-evident. You will become better at this type of welding quickly as you do it. The results were phenomenal. No leaks at all. Tested by filling both tanks up with water as the motorhome sat on our concrete driveway. The additional material that I added to the tanks seemed to increase the strength of the tank by making the tank thicker in that area. I don't anticipate ever having to do this again. It sure worked like a charm. ### ⭐⭐⭐⭐⭐ Hard To Find Item At A Good Price *by R***O on 7 June 2025* I needed these to repair a cracked stock tank. The material worked really well. ### ⭐⭐⭐⭐⭐ it works great *by P***N on 5 May 2025* fixed my leaking pond liner it works great --- ## 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.be/products/302753549-poly-welder-pro-polyethylene-welding-strips-5-feet-black](https://www.desertcart.be/products/302753549-poly-welder-pro-polyethylene-welding-strips-5-feet-black) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-09-13*