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View Full Version : Proper glue for mass ring



RBRANTLY
12-18-2011, 06:22 PM
Could someone please suggest the best glue for repairing a 136 in an L300? The mass ring has become loose and I tried to reglue with Gorilla glue (the white expanding type) which I believe is a polyurathane type. Upon turning up a Yamaha M2 ....alas ....it came aloose again. Any help would be greatly appreciated

Lux Man
12-02-2018, 10:01 AM
I see there were no replies to this question. I have been searching everywhere myself. The only suggestion I could find was Loctite 380 or 410 but but it was by one person and he wasn't 100% sure. Please let me know what is recommended or what has worked for you.

Thank you

sguttag
12-07-2018, 02:19 AM
JBL taught us to use the same glue as for the rest of the cone. So, back in the day it would have been a brown Bostik type glue (akin to rubber cement, 3M made or makes something similar). That said, mass-rings by their nature are hard to hold in place and if the driver is driven hard, it is VERY easy for the ring to smack the pole-piece and punch through the dust dome.