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Leak Ender 2000, a $19 spray can containing aluminum paste, bills itself as a "miracle sealer" for everything from gushing gutters to holey hoses.
We sprayed two coats inside rain gutters, carefully focusing on cuts we'd made. The Leak Ender worked pretty well in this simple lab test.
Leaky pipes were another story. We drilled pin- to brad-sized holes in copper tubing, then sealed them with Leak Ender. When we turned the ...