LeakStop12 – A/C Seal Repair for Automobiles, Trucks, & Tractors

LeakStop12 is a formulated leak sealant designed for rubber parts and O-rings located in hose connections inside air conditioning and refrigeration systems. Designed to seal leaks that release one pound of refrigerant or less per day.


LeakStop12 is simple to use, installs in minutes, and seals in seconds. By eliminating leaks in seals, you’ll increase overall performance. Just inject the seal repair into the refrigerant line once a leak is detected, and the repair material seals the leak.

Lower Cost

Less expensive than replacing leaking O-ring and rubber seals. LeakStop12 quickly seals hard to find leaks saving time and money.


RED TEK LeakStop12 helps environment by reducing refrigerant emissions from leaking air conditioning systems.


Safe and easy to use. Less toxic than other seal treatments that contain poisonous methanol. 


Compatible with most common refrigeration materials and lubricants including R134a, R12, metal components, mineral and synthetic (Ester and PAG) lubricants, seals, gaskets, hoses, compressors, and O-rings. Not appropriate for compressor shaft leaks, extremely large leaks (>1 lb. p/day), or leaks in metal components.

No manufacturers warranties have been voided due to use of LeakStop12. LeakStop12 will separate out with the refrigerant oil in the reclaim process. No deleterious effects on the recycling/reclaim equipment will result.


Brand: RED TEK

Model: A/C Seal Repair LeakStop12

MPN: LeakStop12

Classification: A/C Additive

UPC: 819331004010

Part Number: 401

Unit Weight: 4oz (113g)

Chemistry: HC

EPA Certification Required: No

Require Certification to Purchase: No

Case Quantity: 12

Case Weight: 6lbs

Case Size: 11 x 8 x 5.5

Pallet Quantity: 120

Pallet Weight: 720lbs


Contact a sales representative in your area today in order to buy RED TEK StopLeak12 A/C seal repair, kits, and accessories.

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