---
product_id: 17807402
title: "Poly Welder Pro Polyethylene Welding Strips (5), Natural Color, 12\" x 1/16\" x 3/8\""
brand: "rainflo"
price: "$25.03"
currency: USD
in_stock: true
reviews_count: 8
category: "Rain Flo"
url: https://www.desertcart.us/products/17807402-poly-welder-pro-polyethylene-welding-strips-5-natural-color-12
store_origin: US
region: United States of America
---

# 12-inch length for versatile repairs LDPE material ensures chemical resistance 1/16-inch thickness for precision welding Poly Welder Pro Polyethylene Welding Strips (5), Natural Color, 12" x 1/16" x 3/8"

**Brand:** rainflo
**Price:** $25.03
**Availability:** ✅ In Stock

## Summary

> 🛠️ Fix it like a pro, weld it like a boss!

## Quick Answers

- **What is this?** Poly Welder Pro Polyethylene Welding Strips (5), Natural Color, 12" x 1/16" x 3/8" by rainflo
- **How much does it cost?** $25.03 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/17807402-poly-welder-pro-polyethylene-welding-strips-5-natural-color-12)

## 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

- • **Reinforce & Restore:** Not just a patch—adds strength and longevity to aging plastics, saving you costly replacements and downtime.
- • **Universal Compatibility:** Works flawlessly on water tanks, automotive parts, ATVs, and agricultural equipment—your all-in-one repair solution.
- • **Durable Molecular Bonding:** LDPE’s unique molecular structure creates strong, lasting welds that outlast adhesives and quick fixes.
- • **Easy Application, Pro Results:** Designed for use with standard plastic welders and torches, making expert-level repairs accessible to every DIYer.
- • **Invisible Repairs, Maximum Impact:** Natural color strips blend seamlessly with polyethylene surfaces for discreet, professional fixes.

## Overview

Poly Welder Pro Polyethylene Welding Strips are 12-inch long, 1/16-inch thick LDPE strips designed for high-strength, chemical-resistant repairs on polyethylene surfaces. Ideal for water tanks, automotive parts, and outdoor gear, these natural-colored strips enable seamless, durable welds that outperform adhesives, making them essential for professionals and DIY enthusiasts aiming for invisible, long-lasting fixes.

## 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 GREEN color of this rod will match many GREEN polyethylene applications where you need a more invisible repair. This package contains 5 ft. of GREEN 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: Great for Repairing Old ATV Body Work - I've used these a lot for repairing cracks and reinforcing the fenders and other body panels on my 1985 Honda Big Red three-wheeler. They work great with standard plastic welders, hot staplers, and even soldering irons if you know how to do it properly. If done correctly you can make a 30 or 40 year old piece look great again. When the time comes I'll definitely get more of these. I highly recommend grabbing some of these and learning the art of plastic welding. It's rewarding and saves a lot of expense.

## 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 |
|---------------|-------|
| Brand | RainFlo |
| Color | Natural |
| Item Diameter | 0.38 Inches |
| Item dimensions L x W x H | 12 x 1 x 1 inches |
| Material | LDPE polyethylene |
| Shape | Strip |

## Product Details

- **Material:** LDPE polyethylene
- **Brand:** RainFlo
- **Item dimensions L x W x H:** 12 x 1 x 1 inches
- **Color:** Natural
- **Shape:** Strip

## Images

![Poly Welder Pro Polyethylene Welding Strips (5), Natural Color, 12" x 1/16" x 3/8" - Image 1](https://m.media-amazon.com/images/I/41CKnbJHUyL.jpg)

## Available Options

This product comes in different **Color** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ How to successfully weld plastic....
*by T***N on August 16, 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.

### ⭐⭐⭐⭐⭐ Great for Repairing Old ATV Body Work
*by A***R on October 18, 2023*

I've used these a lot for repairing cracks and reinforcing the fenders and other body panels on my 1985 Honda Big Red three-wheeler. They work great with standard plastic welders, hot staplers, and even soldering irons if you know how to do it properly. If done correctly you can make a 30 or 40 year old piece look great again. When the time comes I'll definitely get more of these. I highly recommend grabbing some of these and learning the art of plastic welding. It's rewarding and saves a lot of expense.

### ⭐⭐⭐⭐⭐ Sticks Well to Lifetime Tioga Plastic Kayak, OK to be Ugly -- UPDATE, IT IS NOT OK TO BE UGLY
*by T***R on December 4, 2022*

I am hard on my sit on top kayaks, dragging them across gravel, nailheads on decks, etc. The keel on one of them was gauged open by a nail head, and I tried everything to fix it. Plastic epoxy impregnating fibeglass cloth---it peeled off. 3M super adhesive that sticks to everything, with fiberglass cloth---it began to peel off at edges with light use. Nothing would stick once the kayak hit the rocks and sand. I bought the green plastic welding sticks and a heat gun. When you heat the plastic, first, the crack opens bigger and the plastic begins to deform a bit. But it doesn't look anything like liquid, so you are doubtful that it can stick securely to the welding sticks. And when you heat the plastic welding strip, it begins to droop but it also does not resemble liquid, so it seems doubtful that it will stick. You lay the strip across the crack, and at first the crack just seems to get wider as the plastic heats up. So you end up laying three strips across a crack that you thought would be covered by one strip. And you can't melt it completely smooth, because the shape of the boat begins to warp. I just licked a spoon so it wouldn't stick to the plastic, and smoothed it down a bit with the back of the spoon. I stopped before making a liquid mess of everything, deciding to test it before trying to get it any hotter. Thankfully, it seemed very secure once it cooled off, and I took it out to the beach and dragged it across the road three times, across the beach, and took it through the surf several times. It shows no signs of pulling loose, and it holds water. This is the first time for a very long time that my sit on top kayak did not take on water when going through the surf (silicone caulk in all the rivets also helped). If I was obsessive compulsive, I would file down the welding job so it was smooth and flush. But if you are obsessive compulsive, you will probably mess up the repair. Just let it be a little ugly, and it seems to hold just fine. Finally, I found something that repaired my kayak, and did not peel off. UPDATE TWO YEARS LATER. THIS REPAIR EVENTUALLY PEELED OFF ON SOME ROCKS. But I'm not changing my rating becuase my technique was wrong. Next I bough a small soldering iron-like device with a flat head on it that is designed for heating and shaping this material. It worked to truly fix the kayak for good. But at the same time I bought the iron, I also bought a kit that had these plastic repair sticks WITH some aluminum mesh to embed in the repair. I put the mesh inside the kayak, inside the repair, for stability. And I was more bold with the melting everything together. It seems to be holding. But you need an iron and some mesh to do it right.

## Frequently Bought Together

- Poly Welder Pro Polyethylene Welding Strips - 5-feet (Natural)
- Poly Welder Pro 200 Watt Plastic Repair Kit (Natural)
- Polyvance Reinforcing Mesh

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-26*