Our R-134a Super Seal (# 325 and MRL-3) seals leaks in metal components (condensers, evaporators, accumulators, receiver/driers). It also seals leaks in rubber parts (hoses, o-rings, gaskets). It works by swelling the rubber in these components to close the holes. Note: Use (# 326) for R12/R22 systems. Our R-134a Stop Leak & Detector (LDS-1) seals leaks in rubber parts including o-rings, hoses and gaskets and includes o-ring conditioners.
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