The U.S. aircraft register, updated daily
Parts

Gray Urethane

No failure report names the gray urethane. 4 FAA approvals let 1 company make a replacement gray urethane, Randolph Products CO holding the most (4).

Approved replacement parts 4 parts manufacturer approvals

A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a gray urethane and sell it as an approved part for the models named. These are the companies holding such approvals for a gray urethane:

MakerPartReplacesFitsGrantedStatus
Randolph Products COGray Urethane Primer UV Block (2 1 mix) PU26622--00PU26622--00Miscellaneous Aircraft Make(s) as listed on Sealed...2003-03-27current
Randolph Products COGray Urethane Primer Component B (catalyst) CUC0010--00CUC0010--00Miscellaneous Aircraft Make(s) as listed on Sealed...2003-03-27current
Randolph Products COGray Urethane Primer UV Block (2 1 mix) PU26622--00Miscellaneous Aircraft Make(s) as listed on Sealed...2001-02-06current
Randolph Products COGray Urethane Primer Component B (catalyst) CUC0010--00Miscellaneous Aircraft Make(s) as listed on Sealed...2001-02-06current

Sources: the FAA's service difficulty reports since 1995 (a report is a part that failed and was fixed, as filed by an airline, repair station or owner; the count shows reporting as much as reliability) and the parts manufacturer approvals in the FAA's Dynamic Regulatory System. The part name is the reporters' and the approval holders' own words, reduced to the first plain words so that spellings meet.