Our Extra Thick Black Rubber Toughened CA speaker repair glue is recommended for for spider to voice coil, spider to frame , cone to coil, surround to basket and some dust caps. Also used for hobby RC car tires, woodturning inlays, burl, and spalted wood. heavy duty bonding, and filling voids. It is important to keep in mind that black rubber toughened CA glues have an extended bonding time due to the added rubber compound. It can take as much as 24 hours to fully cure when larger volumes of the adhesive is applied. For these instances, use of accelerator is highly recommended. When well kept, our product can last a longer shelf life when stored in a cold environment. Just make sure to store the bottle under 40°F before and after use.