At Owatrol we provide many solutions for all types of applications. For an application such as yours, we would certainly recommend applying Tropitech as it is designed for tropical, humid and extremely hot environments and has an unrivalled resistance to UV rays.
Further information on Tropitech and can be found from the following link: http://www.owatrol.pro/index.php?langue=en&page=produits-tropitech
Please review the information on the site and when you have further questions, then please ask and I will do my best to answer them?
All the best