My Freeman tweaked Gen d has significant cracks at the underside of the head due to being dropped, sat upon, or poltergeist activity, I’m not sure. What’s the best way to repair this? The cracks have gaps separating the parts.
Tony
I have had success using the paint-on version of SuperGlue to seal cracks in Gen and Feadog tops. But I would ask Mr. Freeman as his experience is far greater than mine. It would be a shame to damage one of his whistles beyond repair.
Hi Tony,
The traditional method is cello-tape. Electricians tape can be used for added cosmetic value. For a more enduring repair, super-glue is good, apply to the outer surface to prevent globs intrudung into the internal surfaces and make sure the head is not on the body when you glue 
. Super glue is not a good filler - so use one or 2 small cable-ties to keep the cracks closed as the glue sets, cable ties are usually some sort of nylon and should not adhere to the glue very much - finish any globs and peaks with some sandpaper or a nail-file/emery-board. The fit to the body might become a bit tight - make any adjustment carefully before re-assembly or the cracks might re-appear.
Super glue is not a good filler - so use one or 2 small cable-ties to keep the cracks closed as the glue sets, cable ties are usually some sort of nylon and should not adhere to the glue very much
The cable ties are a great idea. Will try that the next time I need a repair. Thanks, Mitch!
Glad to help. Swizzlestick.
Cable ties are very handy.
BUT - Always keep in mind that cable ties pose an extreem danger to children. Once locked, they must be cut to release. If one becomes lodged around a limb or finger, it may be impossible to remove without also cutting the flesh - a trapped extremity or limb could suffer permanent damage from blood-starvation. Fingers alone cannot remove a cable-tie. If one got around a todler’s neck you would have very little time to get it off and tools are not always at hand.
At recent festivals, I have removed these things from children’s wrists and arms after careless workmen have left them lying around. They frighten me - I look forward to the day when a quick-release is mandated in the design.
Guess I will have to add cable ties to the list of things I must hide when little ones come to visit.
A quick release version that could be manipulated with one hand would be much more versatile for almost all my uses. Especially nice to be able to reuse them when you are clamping for projects like you described.
On the other hand, those disposable handcuffs you see on TV shows might not benefit so much. 
Try silicon caulk! It works wonderfully for fixing cracks in bamboo flutes. I tried it once on a plastic whistle head and it rubbed off easily, though. But I think it would work well for filling gaps, and it’s clear so it doesn’t show.