PATENTED ASSEMBLED IN USA SHIPS FAST
FreezeCap™ - Patented A/C Port Leak Sealer
A patented A/C service port valve seal, installed in 30 seconds with no tools. Stops the slow refrigerant leaks behind an estimated 40–60% of slow A/C refrigerant leaks, for $97 instead of an $800+ shop bill.
Buying for a fleet? Save up to 39% on multi-packs.
- 5-pack $79 ea Save $90
- 10-pack $69 ea Save $280
- 20-pack $59 ea Save $760
Compatible: 1994–2012 R-134a, 2021+ R-1234yf · 2013–2020 verify · EPA §609 applies.
Why FreezeCap™ works
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Lifetime Warranty
Defects covered, no expiration
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30-Day Money-Back
Full refund, no questions
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Free US Shipping
On all orders
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Same-Day Dispatch
Order before 3pm CT
SOUND FAMILIAR
If any of this matches your summer, keep reading.
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Already $50–$100 deep in refrigerant cans this summer. The cold air comes back for two or three weeks, then fades again.
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The shop quoted $150 just to diagnose the leak. Before any parts. Before any labor. Before knowing where the leak even is.
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A/C blows warm again 2–3 weeks after every refill. Same cycle, different month. The refrigerant is still escaping somewhere; you just don't know where.
WHY THIS EXISTS
Built for the driver who already paid the shop once and would rather not do it again.
Most slow A/C leaks aren't dramatic. No hissing line. No warning light. The cabin just gradually stops pulling cold. You add a can of refrigerant, and three weeks later you're back to warm air on the freeway.
The shop quotes $150 just to find the leak, with an estimated repair up to $1,500. So you shrug and add another can.
Here's what nobody mentions: roughly 40–60% of those slow leaks originate at the service port, the same small valve a $1 plastic dust cap sits on top of. The valve degrades. The port threads soften. Standard caps can't seal a compromised port. Shops can fix it, but their toolbox doesn't include a $97 answer.
FreezeCap™ is a targeted seal for that one failure point. It snaps onto the service port and drives a pressure-rated seal against the port rim, bypassing the degraded valve entirely. No threading. No system opening. No refrigerant released during installation. Patented technology. Premium metal construction. Assembled in the USA.
It won't fix every leak, and we'd rather say so upfront than sell you the wrong thing. If your leak is at the compressor, condenser, or a hose, FreezeCap™ won't help. But install it, recharge your system, and wait two weeks. If charge holds, the port was your problem. If it doesn't, you've ruled out the most common leak point for $97, cheaper than a shop diagnostic. Either way, you have an answer. The 30-day refund covers the test.
$97 once. 30 seconds. No tools.
30-SECOND INSTALLATION · NO TOOLS REQUIRED
If you can twist a cap off a water bottle, you can install FreezeCap™.
Three steps. One service port. Cold cabin.
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Pop the hood, find service ports.
It's marked with a red, blue, gray or black cap on an aluminum A/C line. Ensure your system is properly charged.
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Snap FreezeCap™ on, twist the dial.
Push straight down until the clamp clicks. Twist the top dial to drive the seal against the port rim. The system never opens, no tools required.
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Drive.
That's the install. No vacuum pump, no shop appointment, no waiting on a parts order. Cabin blows cold on the next start.
$97 ONCE VS $800+ SHOP BILL
Save $800+ on the same fix the shop would charge for.
Working through the numbers most port-leak owners face in a single summer. Numbers are based on common shop pricing in the US; your local quote may vary.
Shop repair path
- Diagnosis fee $150–$250
- Parts + labor $400–$600
- Time off work Half a day, sometimes more
- Repeat refrigerant cans $50–$100 per summer
- Same-leak return rate Common when port damage is the cause
FreezeCap™ path
- Diagnosis fee $0
- Parts + labor $97
- Time off work 30 seconds in your driveway
- Repeat refrigerant cans None
- Same-leak return rate Lifetime warranty
SPECS · WARRANTY · SHIPPING
The details, if you want them.
Compatibility
R-134a variant: 1994–2012 vehicles almost universally. R-1234yf variant: 2021 and newer (EPA mandate for new vehicles). The 2013–2020 model years are the mixed transition window: most major OEMs transitioned by 2017–2019, but some manufacturers (notably Chrysler/FCA) adopted R-1234yf as early as 2014. Verify yours via the A/C system sticker, your owner's manual, or a VIN lookup.
What to confirm before ordering: service port location on your vehicle, refrigerant type matches the variant you select.
What's in the box
- Each FreezeCap™ kit (R-134a or R-1234yf, depending on the variant you order) comes with two caps, a high side and low side cap, one for each of the two service ports.
- Quick-start install card (one page, three steps)
Warranty terms
Lifetime warranty on seal integrity and materials/workmanship defects. If the seal ever fails on a covered defect, we replace it for life. Ship it back and we'll send you a replacement.
30-day money-back guarantee. If FreezeCap™ doesn't seal your service port valve leak, send it back inside 30 days of delivery for a full refund. No restocking fee, no questions.
Shipping
Domestic (US): 1–3 business days via USPS. Orders placed before 3pm CT ship same day.
International: send us an email at orders@freezecap.com.
A Product we stand behind
Results Guaranteed or Your Money Back
Lifetime warranty
If the seal ever fails on a defect in materials or workmanship, we replace it. For life.
30-day money-back guarantee
If FreezeCap™ doesn't seal your port leak, send it back inside 30 days for a full refund. No questions, no restocking fee.
Patented · Assembled in USA
Patented technology. Machined from premium metals and assembled in the United States.
QUESTIONS
The questions every port-leak owner asks.
What if my leak isn't at the service port?
It's estimated that 40–60% of slow A/C leaks happen at the service port valve, so the odds are in your favor, but they aren't 100%. If you install FreezeCap™ and your system still loses charge, the leak is somewhere else. You can still return it within 30 days for a full refund, but in many cases, customers choose to keep it anyway, since it helps eliminate the most common failure point and can prevent repeat leaks down the line. Either way, you’ve ruled out the cheapest fix and potentially avoided a $150 to $250 shop diagnostic fee in the process.
5-minute self-test: spray soapy water on the low-side service port with the system pressurized. Slow bubbles forming at the rim or under the cap = port leak.
Is this just a fancy plastic cap?
No. The original cap that came with your vehicle acts more like a dust cover. FreezeCap™ uses patented technology to lock over the service port and form a secondary seal across the port opening. Refrigerant escaping past a worn Schrader valve stays trapped between the valve and the cap, held in the system instead of bleeding to atmosphere. Premium metal construction, machined and assembled in the USA.
Will this void my warranty?
FreezeCap™ installs on the outside of the sealed refrigerant system. It never opens it. That's mechanically equivalent to swapping the dust cap your vehicle shipped with. Under the Magnuson-Moss Warranty Act, a manufacturer can't void your warranty for using an aftermarket part unless they can prove it caused the failure. FreezeCap™ doesn't touch any sealed component, so there's nothing to point to.
Why hasn't my mechanic mentioned this?
Shops are equipped and paid for full-system repair: vacuum, recharge, parts, labor. A targeted DIY fix isn't part of that workflow. FreezeCap™ is also recently patented, so it isn't yet in standard shop parts catalogs. None of that is a knock on shops; it's just a different repair model.
Does it work on R-1234yf?
Yes. FreezeCap™ ships in two refrigerant variants: R-134a (1994–2012 vehicles almost universally) and R-1234yf (2021 and newer, EPA mandate for new vehicles). The variant selector at the top of the page picks the right one for your vehicle. 2013–2020 is the mixed transition window: verify yours via the under-hood sticker, owner's manual, or VIN lookup before ordering.
How long does the seal last?
The seal is mechanical, not chemical, so it doesn't degrade or wash out. That's why FreezeCap™ comes with a lifetime warranty on seal integrity. If it ever fails on a defect, we replace it for life.
$97 still feels like a lot.
That's fair. Reframe it against what most port-leak owners are already spending: $50 to $100 in refrigerant cans this summer alone, or $800+ for a shop diagnosis and repair. FreezeCap™ is the affordable first step. If it seals your leak, you save $800+. If it doesn't, the 30-day refund makes you whole. The downside is bounded; the upside is a cold cabin for the price of two restaurant dinners.
Still have a question? Email support@freezecap.com and a real person on our team will reply.
VERIFIED REVIEWS
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Verified buyer reviews from Judge.me.
You're one snap away from a cold cabin.
$97 once · 30-second installation · lifetime warranty · 30-day money-back guarantee.
EPA §609 compliant: FreezeCap™ does not open the sealed refrigerant system or vent refrigerant. Results may vary. Compatibility: 1994–2012 vehicles on R-134a; 2021 and newer on R-1234yf; 2013–2020 is the mixed transition window: verify yours via the owner's manual, A/C system sticker, or VIN lookup before ordering.