[codefox1]

Sure. but why not repair the tear first and see. So long as the glue doesn't drip down to the center of the speaker (voice coil, you should be OK. Some like rubber cement, others like Elmer's glue, still others like tailor's blue, and there is also speaker surround glue which is also nice. If the gap is nasty, folks have used coffee filter paper, TP, you name it, just let it dry face down overnight.

Best of luck