Make sure stucco has dried for 5 days before applying stain. Apply stain by using a spray system such as a Wagner power sprayer or a pump sprayer. Apply one solid coat, two coats are suggested, a second coat will give you a darker color stain so do a small area to make sure you like your color. Createastain is very durable and 100% UV protect ant and will outlast your average paint used on stucco surfaces. No sealer is needed for stucco since it will not get heavy traffic use.