(Adds details on Seven Group bid) June 21 (Reuters) -...

(Adds details on Seven Group bid)

June 21 (Reuters) - Australia's Boral Ltd (BLD) on Monday said it would sell its North American building products business to a unit of NYSE-listed Westlake Chemical Corp WLK.N for $2.15 billion.

The announcement came in a disclosure in response to a bid by Seven Group Holdings (SVW) in May to buy all the shares in Boral it did not already own for A$6.50 apiece, valuing the construction materials maker at A$7.91 billion ($5.9 billion).

Following the sale of the North American business, Boral said its net debt target would fall from A$1.5 billion to A$1.3 billion. ($1 = 1.3330 Australian dollars)