I have used West Systems wood epoxies with great results. They are strictly professional grade and have a huge range of products. Here is their clear product and it addresses the UV issue as well. (As I recall their system is a two-part epoxy with interchangeable Fillers and Hardeners.)

West Systems 207 clear hardener

from the description:

105/207 has strong physical properties, so it can be used as a structural adhesive for gluing and laminating. It has excellent compatibility with paints and varnishes. An ultraviolet inhibitor in 207 helps provide a beautiful, long lasting finish when used with quality UV filtering varnish. 105/207 cures clear and colorless.

I have used West Systems wood epoxies with great results. They are strictly professional grade and have a huge range of products. Here is their clear product and it addresses the UV issue as well. (As I recall their system is a two-part epoxy with interchangeable Fillers and Hardeners.)

West Systems 207 clear hardener

from the description:

105/207 has strong physical properties, so it can be used as a structural adhesive for gluing and laminating. It has excellent compatibility with paints and varnishes. An ultraviolet inhibitor in 207 helps provide a beautiful, long lasting finish when used with quality UV filtering varnish. 105/207 cures clear and colorless.

Have used West Systems wood epoxies with great results. They are strictly pro grade and have a huge range of products. Here is their clear and it addresses the UV issue as well. (As I recall their System is a two part epoxy with interchangeable Fillers and Hardeners.)

West Systems 207 clear hardener

from the description:

105/207 has strong physical properties, so it can be used as a structural adhesive for gluing and laminating. It has excellent compatibility with paints and varnishes. An ultraviolet inhibitor in 207 helps provide a beautiful, long lasting finish when used with quality UV filtering varnish. 105/207 cures clear and colorless.

I have used West Systems wood epoxies with great results. They are strictly professional grade and have a huge range of products. Here is their clear product and it addresses the UV issue as well. (As I recall their system is a two-part epoxy with interchangeable Fillers and Hardeners.)

West Systems 207 clear hardener

from the description:

105/207 has strong physical properties, so it can be used as a structural adhesive for gluing and laminating. It has excellent compatibility with paints and varnishes. An ultraviolet inhibitor in 207 helps provide a beautiful, long lasting finish when used with quality UV filtering varnish. 105/207 cures clear and colorless.