Top Secret Coatings has several products that would work great for you but I think you would be exceptionally happy with Deck Pro.

Here is some information on it.

Want the best protective exterior stain available? If you said yes, this is your best choice. Now you can keep the beauty of the wood on your home, deck or trim free of discoloration, peeling and deterioration for years to come. A superior penetrating preservative formulated to provide maximum protection from the elements. The addition of TOP SECRET ultra-violet absorbers block UV rays, while our proprietary blend of resins keep out water and contaminates. Available in a wide variety of designer colors. A water repellant that protects, penetrates and seals, is mildew resistant, and resists damage from the sun. Prevents wood from raised grain, swelling, shrinking, cracking and stains. You will be happy to learn that this product has been formulated to coat in just a single application. Apply one light, evenly applied coat. For interior or exterior use. DECKS: To keep your deck looking new for years to come we recommend that a second coat be applied 3 months after the first coat, and then once every 1 2 years for the life of the deck. It is recommended to coat all 6 sides of the deck boards.

Good luck.

And you can apply it with a spray, if that’s your choice.