What materials will you use the adhesive on? Different materials, such as wood, plastic, or fabric may require a different type of adhesive. Make sure that the specialty adhesives you purchase are the right ones for the job.
What temperatures will you be working with? Most adhesives and sealants work under a wide range of temperatures, but you need to be sure that the temperature range is right for your materials. A sealant that does not hold up under the right temperatures could mean a costly mistake.
How strong do you need your adhesive to be? Some products require stronger specialty adhesives. Make sure you understand the strength required.