Non-yellowing formulation like E6000
The company that manufactures E6000 also has UV6800, which is UV resistant and will not yellow. Sources online I've found:
www.glazecoat.com or you can call Ken @ 1 800 347 0930.
Learned one more important thing. Think it relates to both products. Check date of manufacture which is printed across the tube. Best results obtained when product is no more than a year old. Good to know, huh?