What can I expect after 5-10 years? I'm 50 now.

With regards to VenaSeal, we do not have enough experience in enough different patients to give you an informed opinion about what you should expect in 5-10 years. Though it is safe and effective as judged by the FDA, the experience in the hands of general practicing physicians is still quite limited as is aged data in patients. If you are concerned about long term results (as you well should be), talk to your doctor - preferably one who does several hundred vein treatments a year - about what he or she would do for themselves and what works best *in their hands*. 

Venaseal closure system is an innovative treatment option that uses an adhesive to treat the superficial vein that presents venous insufficiency. One of the advantage of Venaseal in comparison with thermal energy treatments for venous reflux is that no compression stocking use is necessary after the procedure. Insurance coverage varies with different procedures and in the case of Venaseal always check with insurance provider and also your vein specialist beforehand to see your options. I recommend for you an evaluation with a board certified vein specialist. This way you can also discuss all your concerns and options. 
All the best,