Question: Should I use a cyanoacrylate superglue or one of those new one-part polyurethane glues for household repairs and assembly projects?
Answer: Both of these types of adhesives have the advantage of not containing solvents and being single component, so no measuring or mixing is involved. In addition, they both use moisture to initiate the curing. However, superglues use traces of atmospheric moisture on the surfaces to be bonded, while polyurethanes can cure from the outside of the bond or be speeded up by moistening the surface. Superglue products have been sold for many years and have the benefit of curing very rapidly (seconds to minutes) to give strong bonds on many surfaces (including fingers!).Surfaces need to be tight fitting, and bonds are not very tough from an impact point of view.