
Concrete Crack Repair – Kits, Ports, Tools & Accessories – Built for DIY, Trusted by Pros
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Polygem Corner Ports with Caps – 4-Pack offer a professional-grade solution for concrete crack repair, especially where standard surface ports fall short. Designed specifically for inside and outside corners, these injection ports enable seamless epoxy delivery deep into structural cracks—ensuring a cleaner, faster, and more permanent repair.
Whether you're restoring basement walls, pool foundations, or commercial structures, these durable ports deliver unmatched versatility. The flexible base tab design allows each port to contour to your surface, while included caps prevent backflow and keep your work area clean during multi-stage injections.
Compatible with most low-pressure epoxy injection systems—including Polygem's LCR line—these ports are trusted by contractors, engineers, and DIY users across the country.
For best results, watch our How-To Injection Guide Video demonstrating corner port installation with epoxy. Also see our Before & After Project Gallery for real-world examples.
"These ports made it possible to seal up cracks that ran right into the corner of a basement wall—no mess, and they held tight!" – Tom G., Structural Repair Contractor
"Way better than surface ports for pool walls. They saved us hours of cleanup." – Melissa B., Florida Homeowner
Includes: 4x Polygem Corner Injection Ports with Attached Caps – individually sealed, ready for use.
Michael J Nilles - "Stops leaks! Easy to follow directions. Used this many times for different friends repairs. Never failed."
Alexkuzh - "easy to use - I repaired wide cracks, length 10ft width up to 1\8. Two cans of resin were enough to seal, but I had to buy 3 bottles of liquid resin and 7 plastic injectors, because the crack was deep and long. Very easy to use. Saved a lot of money. I solved my problem. Thank you."
Ken Enneking - "
I did a lot of research before I chose this brand. It is easy to work with. The best feature is that they include the 2 parts of the epoxy in the one tube and you never have to touch the epoxy that goes into the wall. The grey epoxy that you mix to put on the wall surface, comes with far more than needed. I was able to glue 16 feet worth of crack with one kit. By the 2nd repair I was getting complements saying I was a pro."
R.E. - GREAT PRODUCTS!
thomas c - "Great product - Easy to apply and great coverage."
Maria A . - "This product goes on thicker - Whether small or large cracks, this mixture of A & B works well. It is thicker but still goes on cement walls, floors indoors or outdoors area of concrete. Heads up! This product is not made to pour as some products do."
Customer - "It worked as expected - I have a system for fixing cracks in basement walls. I have more solution than the epoxy that comes with the kit. The company did not sell the epoxy by itself. So, I looked online for something that would do the same job. It did not cure as fast, but it worked perfectly. Just wait a day before filling the cracks through the nipples."
Allen Crossley - "Good injection system - Follow directions, I used their instruction video, and all worked out well."
The Beetle - "Came quick - ready to roll! - Grab some for that special project!"
ed - "Works as expected - I ordered this to apply on a 1/4" crack on the exposed foundation in my garage. The crack runs through the entire wall which is about 1' high. I covered the rear of the wall with cardboard so that the epoxy would not leak out the back. I inserted 3 of the injection ports into the crack and covered the rest with cardboard. Using my caulking gun I injected the epoxy mix into the ports starting from the bottom port. The smell from this is pretty strong so I had a fan blowing air across my work area. I let this sit for a couple days before removing the carboard. The epoxy worked in filling the crack and feels solid."
Judy - "This works great! - We applied this to a crack in our basement. It is the best thing we have found for sealing a crack in a wall. Would definitely recommend this for problem in basement wall!"
PSC - "worked great - Worked great would purchase again."
JT - "I followed up a few days later with LCR Epoxy Repair Paste applied around all the lines and in the cracks. This thick epoxy paste should block the rising water. It is a very thick, grey 2-part epoxy paste. It can be smoothed out with a finger or tool dampened with water. Tools can be cleaned with water if done before the epoxy cures. It also has a chemical smell which is not nearly as strong as the clear epoxy from the tube."