---
product_id: 49733400
title: "Air-Con Stop Leak"
brand: "stp"
price: "¥14038"
currency: JPY
in_stock: true
reviews_count: 8
url: https://www.desertcart.jp/products/49733400-air-con-stop-leak
store_origin: JP
region: Japan
---

# Restores A/C cooling efficiency Seals metal & rubber leaks F-Gas compliant, eco-friendly Air-Con Stop Leak

**Brand:** stp
**Price:** ¥14038
**Availability:** ✅ In Stock

## Summary

> ❄️ Seal the leak, feel the chill—don’t sweat the summer!

## Quick Answers

- **What is this?** Air-Con Stop Leak by stp
- **How much does it cost?** ¥14038 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/49733400-air-con-stop-leak)

## Best For

- stp enthusiasts

## Why This Product

- Trusted stp brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Easy Application:** Simple to use with clear instructions—get your A/C running like new in no time.
- • **Eco-Smart Formula:** Fully compliant with F-Gas regulations—safe for your car and the planet.
- • **Cost-Saving Repair:** Avoid costly dealer repairs with a budget-friendly, DIY leak sealer solution.
- • **Trusted Performance:** Proven by real users to restore A/C functionality and keep leaks at bay for months.
- • **Leak-Proof Confidence:** Effectively seals evaporator, condenser, compressor, and rubber components for lasting performance.

## Overview

Air-Con Stop Leak by STP is a professional-grade sealer designed to repair metal and rubber leaks in automotive air conditioning systems. It complies with F-Gas regulations, ensuring eco-friendly use, and offers a cost-effective alternative to expensive dealer repairs. Ideal for traditional belt-driven compressors, it restores cooling efficiency and prevents refrigerant loss, helping your car’s A/C run smoothly and reliably.

## Description

Repairs metal leaks – evaporator, condenser, compressor, accumulator, receiver/dryer Seals rubber leaks – O-rings, gasket hoses Does not contain R134a – F-Gas regulations compliant Not for use in hybrid/electric vehicles with non-belt driven (electric driven) compressor Important!!! SUPER SEAL WILL NOT REPAIR A VISIBLE HOLE OR A SPLIT IN ANY A/C COMPONENTS.

Review: Best product I have bought in years - I bought this back in April and to be honest didn’t have much hope it would work. My Mazda had been back and forwards to the Mazda main dealer and to a local air con firm and was a few hundred pounds lighter with no results. The main dealer finally said it was the evaporator under the dash and would cost north of £1200, I was not prepared to spend that sort of money on the car so I went through a winter not bothering with air con. The warmer days came and I missed the air con. So I tried this stuff.The compressor was not working as there was no refrigerant in the system, so I got the AC refrigerant to top up the system first, then the compressor kicked in. I then used this stuff and used as per instructions, then top up with more AC refrigerant. Then crossed everything, it works a treat, if fact better than it ever has at a fraction of the cost. So was it a faulty evaporator or just a leak they couldn’t see we will never know, running now for over two months and still good. Just an update it’s now May 25 and still the air conditioning is working.
Review: Recommended - It has been very good up to now and no leaks

## Features

- Car Air Conditioning Leak Sealer

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B074PR987D |
| Best Sellers Rank | 145,494 in Automotive ( See Top 100 in Automotive ) 660 in Fillers, Adhesives & Sealants |
| Brand | STP |
| Customer Reviews | 3.8 3.8 out of 5 stars (224) |
| Date First Available | 9 Aug. 2017 |
| Manufacturer | STP |
| Manufacturer part number | MRL-3UK |
| Manufacturer reference | MRL-3UK |

## Images

![Air-Con Stop Leak - Image 1](https://m.media-amazon.com/images/I/61jCdEJip8L.jpg)
![Air-Con Stop Leak - Image 2](https://m.media-amazon.com/images/I/31l+72uaLUL.jpg)

## Questions & Answers

**Q: Can you use it with the new type of gas (1234yf)?**
A: This product can only be used the R134a type gas.

**Q: Will this work on a home ac split unit system? suspect leaking pipes inside brick wall, so i'm avoiding breaking through brick**
A: I was a fridge engineer for forty something year's.......this is a tricky one.....your pipe size will be bigger, and it might well depend on if your leak is on the high side or low side.....have you checked for any signs of oil anywhere? first........tried soap and water on all joints.......is your system on 134 a.....most probably is.....the only real way to have a good chance of finding your leak would be with a electronic leak detector........and finally this gas has rocketed up in price........god knows how many of these you would need.....is there a sight glass? if you can see lots of bubbles your going to need a lot of these.....guess you have nothing to lose and try it first.....but I think your going to have to get someone in with the right equipment .hope this helped

**Q: Could I wait 20mins or so befor a regas at a garage, to give me time to get there if I did it at home.**
A: Depends on how bad your leak is, hope this helps

**Q: hi will this work if the system is empty?**
A: This product needs some Air Con gas in the system for it to work.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Best product I have bought in years
*by P***L on 14 June 2022*

I bought this back in April and to be honest didn’t have much hope it would work. My Mazda had been back and forwards to the Mazda main dealer and to a local air con firm and was a few hundred pounds lighter with no results. The main dealer finally said it was the evaporator under the dash and would cost north of £1200, I was not prepared to spend that sort of money on the car so I went through a winter not bothering with air con. The warmer days came and I missed the air con. So I tried this stuff.The compressor was not working as there was no refrigerant in the system, so I got the AC refrigerant to top up the system first, then the compressor kicked in. I then used this stuff and used as per instructions, then top up with more AC refrigerant. Then crossed everything, it works a treat, if fact better than it ever has at a fraction of the cost. So was it a faulty evaporator or just a leak they couldn’t see we will never know, running now for over two months and still good. Just an update it’s now May 25 and still the air conditioning is working.

### ⭐⭐⭐⭐⭐ Recommended
*by B***Y on 22 August 2025*

It has been very good up to now and no leaks

### ⭐ Nozzle doesn't fit securely
*by J***H on 11 January 2022*

Bought this to seal a small leak on a 2011 vauxhall corsa. I recharged the gas using stp air con recharge...very easy to do. I noticed straight away that the plastic nozzle that goes onto the low pressure port id different from the one that charges the gas. I tried to fit it on but it would not stay in the down position no matter what I done and I lost all my gas due to this. Complete waste of money.

## Frequently Bought Together

- Air-Con Stop Leak
- Car Aircon Air Con Air Conditioning Top Up Recharge Refill Regas Can x 3 DIY Gas
- Car R134A Air Conditioning Refrigerant Charging Hose with Gauge, Car AC Refrigerant Charge Hose Kit (1/2 Thread for Europe and American)

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.jp/products/49733400-air-con-stop-leak](https://www.desertcart.jp/products/49733400-air-con-stop-leak)

---

*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-08*