westlakeWestlake Chemical Corp. has engaged Sard Verbinnen & Co. and Mackenzie Partners to drum up support for its $20-per-share bid for Axiall Corp.

Axiall, which is working with Joele Frank on the PR front, has rejected the overture.

Westlake, a maker of petrochemicals and building produts, said the deal is worth $2.9B, including assumption of about $1.5B in Axiall debt. The company wants to diversify its operations with Axiall's building materials production. Westlake said Axiall's board shot down the deal and has refused to engage in talks about the deal.

“We believe that Westlake’s proposal is an opportunistic attempt to take advantage of challenging public equity market conditions and significantly undervalues Axiall’s assets and its long-term prospects,” Timothy Mann, president and CEO, said in a statement.

Mann added that the company is committed to cutting $100M in costs by the end of 2016 and is looking at a possible sale of its building products business.