A Tech-Patch will repair HDPE pipe that has a crack in it
With our patented Polymer Bonding Process (Process), Tech-Patches are quickly, easily and permanently bonded to HDPE Polyethylene pipe. Many will find that statement difficult to believe, but since 2016, the Process has bonded every polymer tested both in the lab and in the field. Tech-Patches are themselves a polymer, fluorosilicone (FVMQ). Fluorosilicone is the polymer of choice in extreme environments for the automotive and aerospace industries.
XT Tech-Patches have a 120 psi rating. Because the Process works so well with polymers, the rating of a Tech-Patch on HDPE pipe will be higher. In the first burst pressure test attempt, the end caps blew off. We’re looking for a better method for attaching the end caps. Stay tuned.
Tech-Patches like HDPE are leakproof, flexible, impervious or highly resistant to oil, gas, all hydrocarbons, water, weather, salt, dirt, grease and most common chemicals. The Process bonds the Tech-Patch to the HDPE substrate and, since Tech-Patches are a polymer, the patch repair will last as long as the pipe.
HDPE is the pipe substrate of the 21st century
HDPE pipe is either stronger or more durable than other pipe substrates which makes HDPE pipe the preferred pipe for the 21st century. However, accidents do happen and, unless the Process and a Tech-Patch is used, an accident means an expensive repair. With a Tech-Patch, the repair will last as long as the pipe. We’ve said that, but the statement needs repeating.
Common HDPE Pipe Repair Causes
There are five main causes of HDPE Pipe Repair. These causes are fusion failure, poor installation, inadequate wall thickness, pullout force and third party damage. There are not many viable, affordable repair methods for HDPE pipe. As a result the Chemical Engineering Department of Oregon State University conducted a study in which they attempted to use several commercially available adhesives to repair HDPE pipe. They found that the adhesives demonstrated poor strength and were difficult to apply. What they needed was the Bonding Poly Process, Poly Prep Adhesion Promoter, a surface insensitive (SI) molecular bonding agent and of course a Tech-Patch. With these tools, applying a patch for a number of repair problems such as wall thinning, is quick and easy. If you want to see just how easy it is, refer to the video below.
Video on how to apply a Tech-Patch
Instructions for repairing cracked HDPE pipe
- Make sure that the HDPE pipe is clean and free of dirt, grease and oil
- Drill a small hole at each end of the crack. With the drilled holes, the crack will not expand.
- Rough the HDPE pipe with a medium grit sandpaper.
- Clean the surface with any cleaner that will not leave a residue.
- Wipe the surface until clean with a soft cloth.
- Saturate the surface with the Poly Prep. Let dry
- Spray the Activator/Accelerator on the prepped area. Let dry.
- Warm the prepped surface with a heat gun or hair dryer. Warm to 120 degrees F by temperature, to just below hot by touch.
- Apply the SI Black to the precut Tech-Patch
– Apply using concentric circles starting at the edges and working toward the center>
– Do not apply the SI Black to diagonal corners.
– Apply extra SI Black where the damaged area will be covered.
- Grab the diagonal corners, apply tension and press onto the pipe for eight to ten seconds.
- Use the fingers to press down the edges.
- Apply pressure to the Tech-Patch from the center out the glue squeegee.
- Apply a bead of SI Black to the two diagonal corners and to the entire perimeter of the Tech-Patch.
- Spray the seam with the Activator/Accelerator.
- Visually inspect the Tech-Patch.
- Apply SI Black and then spray the Activator/Accelerator to any problem areas.
*Our Poly Kits will bond HDPE polyethylene pipe to itself and any other substrate, except glass and stainless steel. Tech-Patches with Poly Kits are also available in our Online Store.
If you have any questions, please call 877 565 7225.