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Throw away the 5200. This is absolutely the wrong product.

You want to remove the fasteners. Drill out the hole two bit sizes. Tape off the area. Squirt Gorilla glue and fill the hole 1/2 way. The glue will expand. You should add enough so it slighly overfills the hole. Let cure. Trim excess. Drill the original screw size. Reinsert new stainless oval headed screws #8 or #10. You want the screw to go into the deck at least 1-1/2 inches.

To seal a hole, use a marine sealant like Boat Life's Life Caulk. Nothing with the word "Adhesive" in the description.

Remove the other screws and add sealant in the deck holes. If they are loose, drive a screw that is one size larger.