Fender Welting Installation
you have ever installed fender welting, then your know how much trouble it
can be. If your new to the hobby, this article will guide you
through the process of installing fender and body welting. Even if
you have been doing this for years, check out some of tricks that may help
make the job easier.
First, you might ask your
self "What the heck is welting and what is it used for"? The use
of seam welting can be found as far back as the turn of the century.
Welting was primarily uses in the construction of railroad
passenger cars and horse drawn coaches . The use of welting was to
provide for a squeak free weather seal between 2 flanged metal surfaces.
construction methods utilized welting in their construction to provide
squeak free, weather resistant seals between fenders and cowlings.
As design methods improved the way sheet metal components were attached to
automotive chassis, the need for welting faded. The advent of new
materials such as seam chalk and other products changed the way
manufactures built cars and trucks.
of the first welting used in automotive construction was made of canvas or
of a heavy cotton material folded over heavy twine and sewn. The
material was then covered in a lacquer based doping material, usually
black or brown in color. Because this type of welting was constructed of
natural materials, it did not hold up very well over time.
Much of the new welting on
the market today, is made of vinyl materials and stitched with
mono-filament type threads. Another types of welting are made of
polyurethane, and are extruded in one piece. The use of this new materials
offers the hobbyist a second use for welting, accent. Many manufactures
offer custom welting in designer colors that match or accent the vehicles
As shown here, this welting
in made of polyurethane and tinted Black. It's solid construction
makes is a little more difficult to install, but it has a longer life than
most other materials on the market today.
photo show's the flanged area where the welting is to be applied.
Originally, the fender would have been attached loosely to the body with
enough room to slip the welting in between the fender and body.
Slits would have been cut into the material to allow for the fender bolts.
The fender would then be tightened. The lacquer covering of the original
welting was tacky enough to hole the welting in place while the fender was
Today, if you were to use
the same method, you would have problem. The vinyl and polyurethane
materials are slick, making them very hard to keep in place during