I realize that the meter/mix equipment can be a major inconvenience. Adhesives come in two forms, namely two component or one component. Two-component adhesives are mainly epoxies, reactive acrylics, or polyurethanes. Customers turn to two-component adhesives because they cure very quickly at room temperature and they can fill large gaps. However, customers often use these adhesives due to necessity rather than by choice.

Solvent- or water-based adhesives can be used, but they have obvious disadvantages such as the necessity for drying or hazards such as flammability or health hazards. Most other one-component adhesives require an external chemical or energy source to initiate curing. These one-component adhesives include: hot melts, which must be heated; reactive hot-melt urethanes, which require heat plus atmospheric moisture for curing; and heat-cured epoxies. Last but not least are UV- or visible light-cured adhesives that allow very fast curing but always require one substrate to be transparent to the radiation.