In an interview on CNBC, Peltz said he wants to work with P&G CEO David Taylor, though the two are engaged in an increasingly heated proxy battle and war of words. On Tuesday, P&G is expected to release an investor presentation that includes a section taking aim at Peltz and his track record at other companies.
According to a copy of that section, which was reviewed by CNBC, P&G seeks to show that when Peltz is invested in a company or sits on its board, he destroys rather than adds long-term value.
Peltz said P&G is losing market share, adding that the way current management is running the company is dangerous. "They're overseeing a melting ice cube," he said. "They're losing market share consistently year in year out."
"What's dangerous is to continue to do things the way they are doing things," he said.
Peltz is appealing to shareholders to get on the board, saying Tuesday that when he has had a seat at the table, total shareholder return and earnings for those companies outperformed the S&P by 8 percent.
P&G's Taylor, in making the case against Peltz's election to the board, has described some of his proposals as dangerous to the long-term future of the company. The investor presentation containing the case against the activist is a fairly aggressive move for a company but could become more common as dissident shareholders take on bigger companies that have the resources to put up a fight.
Peltz told CNBC on Tuesday he doesn't "take this personally," but he rejected the idea that he was disruptive. "I'll be one vote out of 12," he said, referring to the board. "How disruptive could I possibly be?"