San Diego-based Websense said on Thursday it had offered to buy U.K.-based rival SurfControl in a deal valued at about $400 million in cash. Both companies sell products designed to , such as Web sites that .
The acquisition is expected to close about four months after it wins regulatory approval. Websense is paying for the acquisition with existing cash and financing. The company expects to have a debt of approximately $180 million to $200 million after the close of the deal, it said.