Straps, Not Glue:
The Solvid CamStrap is just that: Straps with a camera mount. For this reason, you are not required to use any permanent adhesives or screws to secure the strap to a helmet or head. You just strap it on, get some action footage, take it off and it is ready for the next helmet.
We have tried the CamStrap on many helmets and each time it was all we could do to shake it loose. Sometimes we had to take the visor off to get a secure grip on the helmet, but this is very easy.
Will the Solvid Helmet Cam come off in the event of a hard crash? There is a possibility it might, but we have found that if you hit that hard, the safest thing for the camera and CamStrap is to remove itself as far away from the user and whatever other equipment they are using (dirt bike, jet ski, etc.).