For repairing leaking plumbing pipes, permanent replacement fittings, proper PVC solvent cement, threaded unions, and new rubber gaskets work infinitely better than rubberized spray coatings like Flex Seal. Professional plumbers consider spray-on rubber patches to be temporary emergency band-aids rather than permanent solutions. Flex Seal struggles to adhere permanently to wet, pressurized supply lines or oily PVC surfaces, and internal water pressure will eventually cause temporary patches to blow out. Verification: Replace temporary tape or spray patches with proper replacement pipes or fittings as soon as possible.
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