Quote Originally Posted by Holliday Obrecht View Post
We are building the ULF-1 all wood microlight sailplane and need a US source for Aerolite adhesive used in boat construction. Anyone have any contacts?
Looks like a tough item to find. Weldwood is another urea formaldehyde glue, but one source says it's different in its gap-filling ability.

Keep in mind that the FAA discourages the use of UF glues on certified aircraft. From AC43-13-1B, page 1-4, para 1-4(b):

(3) Plastic resin glue (urea-formaldehyde resin glue) has been used in wood aircraft for many years. Caution should be used due to possible rapid deterioration (more rapidly than wood) of plastic resin glue in hot, moist environments and under cyclic swell-shrink stress. For these reasons, urea-formaldehyde should be considered obsolete for all repairs. Any proposed use of this type adhesive should be discussed with the appropriate FAA office prior to using on certificated aircraft.

Ron Wanttaja