improving agents antioxidants adhesion promoters metal deactivators antiozonants light stabilizers a plasticizer or combination of plasticizers lubricants pigments foaming agents flame retardants and antistatic agents a preferred embodiment of the instant invention contains a plasticizer present in an amount ranging from 15 by weight to 20 by weight a preferred embodiment of the present invention may contain an adhesion promoter or combination of adhesion promoters present in an amount ranging from 1 5 by weight to 2 5 by weight a preferred embodiment of the present invention may contain a catalyst or combination of catalysts present in an amount ranging from 0 05 by weight to 0 25 by weight a preferred embodiment of the invention may contain a rosin ester in an amount of from 1 to 15 by weight of the total composition the instant invention has a safety profile superior to most other construction adhesives solvent free formulations of the instant invention present lower flammability risk lower inhalation risk low voc emissions and are safer to use in confined spaces the instant invention can also be formulated to be free of isocyanates isocyanates are used in urethane adhesives isocyanates have been identified by osha as a potential carcinogen health effects of isocyanate exposure include irritation.