Oakum is a rope made of flax fibres impregnated with pine tar (Stockholm tar). It is used in traditional boat building as a caulking method to seal joints or fill gaps between the timber boards. Oakum is forced between planks. It can be used as a natural method for plugging gaps between timber window frames and surrounding masonry and gaps between components of timber frames. The caulking is then covered over with burnt sand mastic or linseed oil putty to produce a weather tight finish when used externally.
Oakum can be readily torn into smaller pieces to suit your application.
As a guide 1kg (2.2 lb) will fill around 4 to 5 linear metres (13 to 16 ft), dependant on the width and depth of the gap to fill.
Sold by the kg