used to fix the camera on helmet sticker is ultra powerful it must be degreased before, I have sanded the area 600 then a degreasing acetone and bonding support nickel I have equipped all my helmets! considering the price, so do not deprive yourself
1 star less because it lacks a paper how to fix it for the "pickling" it is a method of aero editor, it would be nice they give installation advice with the product.