Preventing Moisture from Building Up under Your Home

How to Repair Plastic Gutter Seams

Prepare a tube of exterior-grade polyurethane caulk.

Cut the tip off the caulk tube nozzle at a point where it produces a bead large enough to fill the crack. Start small — you can always make the hole bigger. A 1/4-inch bead is large enough for most cracks. After you cut the tip, you have to puncture the seal in the end of the caulk tube using a stiff wire or long nail.

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