This traditional product has been the premier choice for traditional deck seaming around the world for decades.
Still produced in England from the original formula, it is as reliable today as throughout the last century. It will adhere tenaciously to the seam for many years, remaining flexible in low temperatures and withstanding softening at high temperatures.
To apply, once carefully heated to around 190 degrees C (370F) it can be poured onto the prepared seams. Two applications are needed to ensure that all steam and air are released. Average usage is 1kg to 10 metre run.

Jeffery's No.2 Black Marine Glue Instructions and Data Sheet.