Shares of Mold-Tek Packaging extended their gains for the second consecutive session on Tuesday, rising nearly 15 percent over the two trading days following the company's September quarter results. The stock surged 8.9 percent to an intraday high of Rs 318.80 on the NSE. However, it pared some gains due to profit booking at higher levels and was trading at Rs 306.15, up 4.67 percent, at around 10:30 a.m.