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How to Seal Glass Tubing

Sealing the end of a glass tube is the first step in many glass-blowing projects. By sealing the end of the tube, you create a closed space which can be carefully blown into a bubble. A length of glass tube with one or both ends sealed is also a handy stir rod for chemistry labs. When carefully done, creating sealed glass tubing is a quick and easy process.

Things You'll Need

Heat-resistant gloves
Safety goggles
Bunsen burner or blow torch

Instructions

- 1
  Put on heat-resistant gloves and safety goggles.
- 2
  Light the Bunsen burner or torch and adjust the valve until it burns with a quiet blue flame.
- 3
  Hold the length of tubing by both ends and bring the center of the tube into the flame. Keep the tube steady until the glass in the flame becomes soft and pliable.
- 4
  Twist the ends of the tube in opposite directions while pulling them apart.
- 5
  Set the two halves aside on a heat-resistant surface to cool.

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