Clear Coat. Stucco-Guard by Seal-Krete protects new and old stucco against freeze/thaw damage and rain driven by winds of up to 124 mph, says the maker. The water-based acrylic sealer goes on white but dries clear and works either as a primer or a breathable top coat. It can be sprayed, rolled, or brushed like conventional paint or applied with a garden sprayer. It retails for $22 a gallon. Convenience Products, 800/323-7357. seal-krete.com