The chemical composition of various types of sealants differs significantly. Most sealants are based on petroleum derivatives. Because many of the chemicals used in the manufacture of sealants are classified as hazardous, the waste generated in the production of feedstock chemicals and in the manufacturing process must be handled and disposed of in accordance with federal regulations.
Some sealants are preferable for indoor use due to their lower emission rates.
Among these are oleoresinous, acrylic emulsion latex, polysulfide, polyurethane, and silicone sealants. The curing time of a sealant and the amount used are also important factors. When using sealants indoors, ventilation should be increased. Other precautions, such as use of protective clothing, should be followed. Consider some of the low-emitting sealants that are now available.