I noticed this the other day when the oil boiler was running. Looks like it needs
re-chalking -

http://img26.imageshack.us/img26/2023/dsc01398wq.jpg (the exhaust pipe from the oil
burner to the chimney area)

The previous owners were the ones that did it initially. Was just wondering what
specific chalking is needed here...and is a certain brand recommended ?

thanks much