The gap you intend to fill with UV adhesive would be an important aspect to consider when you actually look forward to choosing the right adhesive for the task. It would often be seen that the joining of two materials would also entail a degree of gap-filling. It would be pertinent to mention here that the adhesives would vary in their overall ability to cope with the pressure.
When it comes to shopping for UV adhesive, your best bet would be Axend. The platform would cater to your specific needs and requirements in the best manner possible. They would provide you with customized UV products suitable to your specific requirements for a reasonable amount.