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🔧 Seal smarter, cool longer — don’t let leaks leave you out in the heat!
RectorSeal AC Leak Freeze Pro Nano with UV is a 1.5 oz professional-grade refrigerant leak sealant featuring cutting-edge nano-particle technology and UV detection. Designed for HVAC and refrigeration systems, it permanently seals micro leaks in copper and aluminum coils, is OEM approved, non-toxic, and easy to apply with a standard 1/4" adapter. Trusted by tradesmen to extend system life and improve efficiency.
| ASIN | B07SZJ6RLX |
| Best Sellers Rank | #191,915 in Automotive ( See Top 100 in Automotive ) #56 in Refrigerants |
| Brand Name | Rectorseal |
| Color | Yellow |
| Compatible Material | For Use in Copper and Aluminum Coils |
| Customer Reviews | 3.9 3.9 out of 5 stars (41) |
| Global Trade Identification Number | 00021449453189 |
| Included Components | AC Leak Freeze PRO Nano UV |
| Item Dimensions | 1.5 x 2 x 10 inches |
| Item Form | Liquid |
| Item Type Name | leak sealer |
| Manufacturer | Rectorseal |
| Material Type | leak seeking nano particles creates a stronger dual sealant |
| Model | 45318 |
| Number of Items | 1 |
| Part Number | 45318 |
| Style Name | AC refrigeration systems |
| Surface Recommendation | Indoor/ Outdoor |
| UPC | 021449453189 |
| Unit Count | 1.0 Count |
| Water Resistance Level | Water Resistant |
D**E
Best to have gauges hooked up.
So far this has worked better than anything else I have tried. I used this in a 3ton mini split that I couldn’t keep charged for more than a month, I have not had to add any refrigerant since I ran this through the system.
F**Y
Did not work properly
Did not work. I believe the product had already been used.
O**1
Solid choice!
Well made and easy to use.
D**P
leakfreeze is a good product
this stuff works sometimes it takes a while but it works
R**Y
So far so good
Had a small leak. Bought it and followed the instructions. Tried to add gas, and didn’t see the PSI goes up, so I thought it didn’t work. When the summer arrived few month later, I saw that I have way too much gas. Had to take a lot off. This product actually worked perfectly (at least so far :)). I’m very happy with the results. Really recommended if you have small leak.
D**R
Leak seal doesn’t work!
I had a small leak in an R-22 Trane system and used this product exactly as instructed on or around August 20, 2025. Less than a month later, on September 19, my tenant reported that the AC stopped working again. The refrigerant had completely leaked out, which means the product did not work at all. Based on my experience, I would not purchase this product again and cannot recommend any of these leak seal solutions—they’re essentially useless. The only feature that might have any value is the UV dye, which I’ll now use to try to properly locate and repair the leak.
D**B
Time will tell but it so far it really works!
I have an 8 year old Mitsubishi mini split AC that developed a small leak in cooling coils (right after warranty was up) and was told parts weren't available and the current air handling (indoor) units were not compatible with my compressor unit. Frustrating for a name brand appliance to end up with such a short life span. Heard this would work on mini-splits and gave it a try. It's been some weeks now and it's still blowing very cold. Finger's crossed!
H**A
RectorSeal AC Leak Freeze Pro Nano with UV 45318 Refrigerant Leak Sealant
It does seal the leak for a bout a few months (3 - 4 months) and than the air conditioner gas start a gain to leak
Trustpilot
1 month ago
2 months ago