Titebond Instant Bond is a two-part bonding system that takes between 5 - 15 seconds to set and 30 - 60 seconds for initial cure. It provides a strong， permanent bond and is ideal for hard to reach joints or surface areas that are difficult to clamp. Designed primarily for wood and wood products， this adhesive is also very effective on a wide variety of materials and substrates. The medium viscosity product offers an assembly time of 7 seconds and an initial cure speed of 5 seconds. In addition to typical bonding applications， it is ideal for filling knots and voids in wood， adhering pen tubes to blanks for pen turning applications and for soaking end-grain to prevent splitting. Can also be used with Mfg #6311 Instant Bond Activator - Instant Bond Activator is used to accelerate the curing of all Titebond Instant Bond Adhesives. The Activator is especially effective for large gaps， very porous woods and bridge bonding joints， bonding acidic surfaces or in low humidity conditions. It is a heptane-based solvent that will not mar finishes or damage plastics.