[Al Skierkiewicz]

From the manual
<R5> c. The following additional components may also be used:

5. Polycarbonate glue/cement is allowed, only for the joining of polycarbonate pieces. Use of polycarbonate glues/cements may or may not be allowed in the pits at tournaments based on site-specific rules or requirements.

12. PVC cement and cleaner (only for gluing PVC). Use of PVC cements and cleaners may or may not be allowed in the pits at tournaments based on site-specific rules or requirements.

<R9> Parts may NOT be modified as follows:
Welding, soldering (except as listed below), brazing, gluing, melting or attaching in any way that is not provided within the TETRIX System will NOT be allowed.

Although slightly contradictory, PVC cements can be used to glue PVC to PVC and polycarbonate glues/cements for polycarbonate, but glues of any kind cannot be used to bind other robot parts together to form structural bonds. Threadlocker is the only exception when used on hardware only.