RectorSeal AC Leak Freeze Magic Frost with 1/4" Adapter 45322 Leak Sealant, Non- Polymer Formula & Safe for Refrigeration Systems, Easy Application, HVAC, 0.5 oz.

3 months and holding good.

Freeze leak was difficult to administer with the caulking gun because I didn’t know how to lower the pressure on the low side of my heat-pump unit. However, after running the leak test on my furnace evaporation coils the leak had stopped within 30 minutes. I’m rating this product 5 stars because I was only able to get 70% of the freeze leak in my air conditioning system and it still worked to stop the leak ..😃

It did not work in my unit but it was 26 years old and beyond repair. I replaced entire unit couple weeks later. I think it would work with less severe leaks throughout.

I will update the review if anything changes but so far this stuff has worked for me. I have a system that is almost 15 years old, r-22. Over the last few years I have noticed the cooling performance go down year after year. The coils and filters are clean so I checked pressure and realized I was a few pounds low. I ran this sealant through first and then topped up the system. I now have ice cold air. Obviously I need more time to verify the longevity of the patch but preliminary results are looking good.

I have an under cabinet wine fridge with a leak that takes 1.4 Oz of 134a. I recharged it and it stayed cool for about 2 weeks before it goes warm again.This is 1/2 an oz, instructions say do not use more than 10% of total system charge, which is just a touch more than 1/8 of an oz or about 1/4 of the vial.It may work if your system takes 3.75- 5 oz of coolant (becasue 1/4 of the product remains in the feeder tube) but otherwise...Here's the problems. Its messy, hard to control, and it didn't work even at a very high dose rate.The feeder hose holds about 1/8 oz (which is 25% of the product wasted). You have to fill the hose before you connect it. There must be some type of check valve on the hose end that attaches to the syringe- so you really have to jam the plunger to get it started- then it spurts out everywhere, and you've wasted half of your half oz. (here's a tip, I've seen people put it in a caulk gun to force it into the high side, but that may also work to control small incraments into the tube.) Then, a system with a slow leak will have a negative pressure on the low side, so the minute you open the valve, the system sucks it in- its impossible to control the amount added, so 1/2 was added before I could shut the valve. (I probably could have taped 2 small shims to the cylendar to keep the plunger back to the proper amount, something to think about if your system takes less than 6-7 oz of refridgerant).Finally, it didn't seal the slow leak, becasue 2 weeks later here I am with a wine fridge at 70 degrees again, despite inadvertently dosing double.I added the remainder, the final 1/8 oz, to the system today, hoping a second dose would do it, and I'll let you know, but I wouldn't buy this product again.I would suggest a couple things to someone considering buying this product.. Buy a larger dose. More than you think you will need given 1/4 of the product is wasted in the tube on either end (1/8 oz to fill the tube, and 1/8 oz remaining in the tube after the plunger is depressed completely).Other people have said

I have a large wine fridge that would lose charge (5oz) in less than 7 days. I charged the system about 5 times before finding this product. A bit pricey, but I can say it has worked. I did need to charge the system 2 times after using this product. But, since the last charge, it has held for over 3 weeks. I did not find this to be messy at all. Simply bleed the air out of the tube, hook up to low side and squeeze in. I just assumed the company knows that 1/4 of the product stays in the tube, and has added the extra amount so the entire.5oz enters your refrigeration system.

I guess time will tell if it actually works, since 1/3 of the product leaked past the plunger when I was pushing it into my R22 system. Not sure if I got enough of it into my AC system. Wish I could get a replacement product for this one with a faulty plunger.Edit: I reached out to Rectorseal for a warranty replacement. They rejected it...told me to return it to Amazon for replacement (which is not possible unless you are in the 30 day return window. I am not). Not impressed with Rectorseal as a company.

This item is defective, the inlet side on the schrader valve is bent.