A/C QUICKCAPS just a gimmick or actually useful?

[atikovi]

https://acquickcaps.com/

I'm referencing this topic from last year viewtopic.php?t=15351&sid=8f73f1b65389b ... 0b85000ea2 about the role of dust caps on the service ports and what role they play in keeping the system from leaking. It mentioned that the caps will prevent refrigerant loss even if the Schrader valves leak.

I came across an ad for A/C QUICKCAPS that pretty much says the opposite:
Traditional A/C caps don’t seal — they’re just dust covers. Even with brand-new Schrader valves, you’ll lose up to 10% of your refrigerant every year. If there’s a larger leak, you could lose it all in minutes or days — costing you $400–$1,000 or more in repairs, parts, and recharge labor.

Until now, no A/C cap could stop that.
A/C Quick Caps™ are the first and only caps engineered to fully seal refrigerant in.
No more trying to find the right cap, the one size fits all means all you need to know is your refrigerant type. It's fast, easy, and leak proof!

At $60 a pair, are they just a scam?

[Tim]

No need to spam our site with that link. A good Schrader valve and a service cap with a fresh O-ring will be all you need.

[Carguychris85]

I used the metal caps on GM high side ports until they came out with a valve core that allowed a traditional schrader valve core to be used rather than that dumb nylon rubber ball. Even with the plastic cap in place those GMs could lose the full charge in a week when that junk service port failed to seal or started leaking shortly after service work was performed.

[Cusser]

With an electronic leak detector, one can readily determine if refrigerant is leaking past the caps.
https://www.ackits.com/tools/electronic ... -43-mt2734