with respect to any actual,potential or threatened product liability claim action or proceeding relating to any product (PL Claim),seller shall
in case of PL Claim against Seller communicate with buyer from time to time and observe the instructions of buyer and in case of PL claim against buyer,cooperate with buyer in investigating the facts and circumstances surrounding the PL Claim and litigating the matter refrain from taking positions adverse to the interests of buyer and not institute any claim action or proceeding whether by cross-claim third-party inter pleader or otherwise against buyer