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™ has a water-thin viscosity that wicks deep into joints by capillary action and cures in a matter of a few seconds. Surfaces to be bonded must be tight fitting and should be held together while you apply the CA around the edges of the seam. At the moment CAs cure, they give off a vapor that can irritate the nose and eyes, so be prepared. Thin CAs work very well on balsa since they penetrate into the wood and form more than just a surface bond.
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.