BSI 102 Cyanoacrylate(CA) 1oz Super Thin -Blue Label 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. Great for building and repairing model rockets. Use the super thin for sealing balsa wood, the glue seeps right in, after it dries sand to a smooth finish. Cyanoacrylates (CAs) or Super Glue 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.