The network has partnered with the mutual to launch a two-year fix at 3.99%, available on loans up to 75%. The deal is available on all properties in England and Wales.
Early repayment charges apply on the product until 31st December 2014, but overpayments up to 50% of the original loan amount are allowed within this period.
Jo Leah, general manager of sales and marketing at Ipswich Building Society, said: “We look forward to extending our relationship with Sesame by offering this product outside of our usual area – giving more intermediaries access to this exclusive product.”
Robert McCoy, senior product and communications manager at Sesame, added: “Two year fixed rate buy-to-let products have been popular recently, and I am sure that this competitive offering will be welcomed by Sesame members.”