Nu Calgon 4050-08 EasySeal Direct Inject (Packaging may vary)

Best, best, best. When your AC has a pin hole somewhere, this product nails it. The sealant seals the hole and you are back in business.

I had a problem injecting the first tube. Lost all the product. For that I would give this 0 star. Seems the valve pin actuator on this is too recessed and doesn’t allow flow. So on a second tube I unscreened the valve core a few turns and it worked fine. I installed this a year ago into a 3.5 ton system that had about a 2-3 lb r22 leak per year. Each year it would need a refill. After installing this and refilling a year ago the system has been fine. No need to refill this year. This likely works best in a condenser or evaporator small tube leak or a small line leak. If you have a leak in the compressor or other major leak this will not work. Good so far after year 1. Will update next year.

I used this product on my daughters central air conditioner system.. It was getting to where you had to recharge the system every 3 weeks to keep it cooling. I added the Nu Calgon Easy Seal about 2 months ago and the Air Conditioner is still working great. According to 2 different thermometers that we used to check the temperature coming out of the inside house registers, it seems to be about 2 degrees cooler then it ever has been. So far i think the stuff is great. It was very easy to inject into the system and other than just watching our reading and adding refrigerant until we achieved the degree of super heat that we wanted it did the rest. It was a no brainer on this one, it was either do or die because charging every 3 weeks was not going to get it. I definitely am a believer in this Nu Calgon 4050-08 EasySeal Direct Inject stop leak.

Great product, works . Best product of its kind ! Professional product, works on small leaks , permanently. Stays in system and continues to work as new leaks occur.

It was easy to use while charging. We will see if it lasts this time. I've had a small leak that cant be found. I have had to add 2-3lbs every year for the last 12yrs I hope it wont need to charged next year. I will update next year or if I have any failures of the system as it's only been a week since I've added this to the unit.

Used it per the instructions and was easy to Use but for some reason didn't fix my leak ?

I cannot recommend this. I had a small leak, topped off with 410a and injected this. My friend owns an HVAC firm and recommended this. It ran fine for 2 days and then the low pressure switch failed. I cannot confirm if it was from this or not. My system is 11 years old so I was ready to replace it if this product failed. That's the only reason I used it. Otherwise I would have looked for the leak.

I've been in the HVAC industry for 20+ years.... this stuff does work but it's not really a permanent solution. I used this in my own system after fixing a leak in my evap coil. I had a big leak that I fixed with a torch and silver solder but after leak testing I found multiple mico leaks. I throw this stuff in to get me by for a few months before I install a whole new system. It works great all the micro leaks were gone.