Cyanoacrylates (CAs) have become the adhesive of choice for most hobby and household applications. High quality CAs such as INSTA-CURE™, when used properly, form bonds that in many cases are stronger than the material that is being adhered. INSTA-CURE™ is a highly refined CA which, combined with its freshness, gives a guaranteed 2 year shelf life. CAs are reactive monomers that chemically link (polymerize) when pressed into a thin film. The very thin layer of water moisture present on most surfaces acts as an alkali, or weak base, which is the catalyst that results in bonding; however, the presence of detectable amounts of water usually degrades the performance of CAs.
INSTA-CURE+™ is a higher viscosity CA for loose fitting joints in which the adhesive must bridge gaps. Normally, the thicker CA is applied to one surface and then the parts are held tightly together for about 5 to 15 seconds. For large surface areas, including those with close fitting joints such as laminations, INSTA-CURE+ ™ should also be used. To prevent premature curing, don’t spread the glue into a thin film. Lay down a serpentine bead with about 1" separations on one surface, then assemble the parts, letting the pressure spread the CA out.
BSI has introduced a new 3/4 oz. size for our cyanoacrylates. The Pocket CAs feature a new top that has a pin built into the cap that covers the nozzle. This pin seals the bottle so that if it is tipped over, the bottle will not leak. This makes the Pocket CAs ideal for keeping in your tool or field box, just like our IC-Gel. One disadvantage that the new Pocket CA top has is the bluntness of the nozzle. This makes it more difficult to apply small amounts of the CA, especially in tight places. From the feedback we have received, it appears about 25-30% of users prefer the new Pocket CA top, which means that over 70% prefer our standard top for general bonding purposes. Most users are buying both types. Our original top for the workshop, and the Pocket CA for use out in the field. The 3/4 oz. Pocket CAs are available in BSI's Insta-Cure, Insta-Cure+, Maxi-Cure and Super-Gold+. BSI's new extender tip #304 works on the Pocket CA and all our other tops.