FORD ESE-M4G195-C - Sealant, silicone rubber - heat resistant. MIL-A-46146 - Adhesives - sealants, silicone, RTV, noncorrosive (for with sensitive metals and equipment).

Everything is sealed up with Sugru, though you could probably use caulk or even hot glue (if you wanted something more temporary and less expensive). The smartest bit has to be the loop on Dave ...

For this sort of application, clear silicone caulk is usually sufficient ... you might consider a copolymer rubber sealant.

Description: RTV Silicone Adhesive Sealant Bonds Most Plastics Many Assembly Uses. Cures at Room Temperature To A Tough Flexible Rubber. Resists Shrinkage Perfect For Caulking, Sealing, Waterproofing ...