Fast-setting high-strength, medium-bodied solvent cement. Bonds acrylics, Rigid PVC, styrene, butyrate, and polycarbonate to themselves and each other. Fills small gaps and dries clear. Safe for water applications. Tube includes an applicator tip.   
For Kaleidoscopes: If you want to seal an acrylic chamber like the ones we carry, this is a great product. It 'chemically welds' the lid and chamber together. Regular glue will not hold when there is a liquid inside! We can't guarantee that your chamber won't leak because we have no control over the process, but this is the correct type of sealant to use for a permanent seal!