De Santis admitted an 18 month deal was in front of Di Vaio after the Italian's revelation on Thursday.
" ... today we made a strong push for Marco Di Vaio, and as a player the most important factor is feeling wanted and important," Santis told the Montreal Gazette.
"The statement he made today was that he would visit Montreal and that this experience in North America would be something that he'd like to do.
"Once he visits with his family, sees the city and gets to know us in person as well, we're very confident (of signing him) because everything that's important to him, regarding his family and the conditions he wants to be playing in, we feel comfortable we can present him with all of that.
"Right now, it's just a waiting period. Wait until he comes. Hopefully we can come to an agreement so that in the next international transfer (window), which reopens June 27, he'll be a part of the Montreal Impact."