Check the listing for details. Black Rubber Toughened CA Medium 4oz Kit Cyanoacrylate Speaker. Condition: New. Listed at 34.99 USD. 4oz Black Medium Rubber Toughened CA Glue Kit High performance industrial grade adhesive. Black CA is used to bond parts, with focus on impact and shock absorbance qualities.Viscosity rating is 1000 CPS Some of the key advantages of using this adhesives are:Easy to useFormulated for LoudspeakersFast cure speed4 times stronger than regular CA Formulated for high vibration application, shock and impact resistantHumidity and heat resistantLab tested for optimal performanceOur thin 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. MADE IN THE USAKit includes: 4oz Rubber Toughened CA glue 2oz activator with spray pump