XSPC RTL is a water based lubricant for bending PETG or Acrylic tubing. RTL stops the bending rubber (bend cord, silicon insert) from getting stuck inside the tube after making a tight bend. This allows you can make more complex and tighter bends without the risk of snapping the insert and ruining the bend. After completing the bend, simply rinse the tube with warm water to remove the lubricant.- Water Based Lubricant- Non-toxic- Easy Clean- Non-staining- Tested with PETG and Acrylic TubingOne 30ml bottle is enough for 1-2 builds and each 100ml bottle is enough for 3-6 builds.How to use:1. Apply a small amount of RTL to the inside of the tube2. Insert the bending rubber and twist it to coat the rubber3. Heat the tube and make the required bend4. Pull the bending rubber out of the tube5. Rinse the tube throughly with warm water to remove lubricant