can be draped around a timber pile that is in need of a repair if any larger diameter piles or supports within a body of water needs to be repaired it is quite possible to cut at least three v shaped cuts into the corrugations 3 down to the smooth wall so as not to over stress any individual live hinge in case that the jacket has to be opened rather wide to surround a large pile support such as could happen with square concrete piles once the jacket has been installed around a pile the edges 4 have to be brought together again and sealed against each other therefore a self adhesive seal 5 has been provided between the edges 4 which will seal against water leaking into the jacket or concrete leaking out at a later time when the jacket is filled with concrete the adhesive seal may consist of a soft foam rubber or some other flexible rubber the seal is adhesive at least on one side so that it will firmly adhere to at least one of the edges 4 and cannot be dislodged fig2 illustrates the jacket 1 after it is installed around a damaged area of the pile p like reference characters have been applied to like elements as explained in fig1 in order to stabilize the interior wall against the pile p standoffs 9 have been provided which are merely nailed into the pile p the standoffs have been shown as u shaped but can take many other forms it is also noted that the standoffs should be made of a plastic material or other non corrosive material because if.