Optical gel is 2-part epoxy
NSN 5975-00-070-1819
NSN 5990-00-713-9016
NSN 5975-00-157-1620
NSN 6620-01-397-8683
NSN 5855-01-323-5394
NSN 5855-01-118-6001
NSN 6645-01-170-5402
NSN 5835-01-442-6079
NSN 5905-01-343-5590
NSN 5895-01-055-4873
NSN 5915-01-571-5894
NSN 5998-00-156-4574