How to Use Silicone on PVC Pipes

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Seams or gaps that exist where you have PVC piping for drains or vents must be sealed. A quick and easy way to seal PVC is with silicone. The pipe must be dry before you apply the silicone; this allows the silicone to set up properly. To seal a PVC pipe with silicon you must first obtain one or more tubes of silicone, then prepare the PVC pipe.

Things You'll Need

  • Cloth or rag
  • Tube of silicone caulk
  • Nail or small wire
  • Utility knife
  • Caulk gun
  • Clean the PVC pipe's surface with a damp cloth or rag to remove dirt and debris.

  • Cut 1/4 inch from the tip of a tube of silicone caulk with the utility knife. Insert a nail or a small wire into the tip of the tube to puncture the seal.

  • Insert the tube of silicone caulk into the caulk gun. Press the push plate against the bottom of the tube.

  • Press the trigger to force the push plate into the tube of silicone.

  • Locate the seam or gap at the joint of a piece of PVC. Place the tip of the tube on the seam or gap that you need to seal.

  • Press the trigger until the silicone comes out of the tip. Slide the tip of the tube along the seam or gap to apply a bead of silicone.

  • Dip your finger in a bowl of water to get it wet. Slide your finger over the silicone to create a smooth texture.

References

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