Recoating Existing Gaco Western Deck Coatings with Acrylic Elastomeric Coating

Surface Preparation: Sweep or blow all dirt and dust from the roof surface. Wash the deck with Gaco Western's D-09 etching detergent and rinse thoroughly with clean water. Do not allow the cleaning solution to dry before rinsing.

Biological Control: If there are any areas of algae, mildew or fungus that show stain on the coating, treat these areas with a chlorine water solution, followed by a clear water rinse. (This treatment can be done using a commercially available chlorine compound available from swimming pool supply houses. Concentration of the chlorine solution should be five times that recommended for normal treatment of swimming pool.)

Loose Coating: Remove all loose coating back to a firmly adhered area. Terminate neatly without frayed edges. Sanding to a featheredge will make it easier to hide the repair spot.

Flashing: Inspect edges and surfaces of existing flashing and repair these areas as necessary.

Drying: After washing and cleaning deck, allow surface to dry 24 hours before applying any coating. ( Note: Drying depends on weather conditions such as temperature, humidity and air movement. The above drying times assume good weather (70°F/21°C) daytime temperature and no rain.) Conditions of lower temperature and rain will require a longer period for drying.

Primer: Apply GacoFlex A-3211 acrylic coating at the nominal rate of one gallon per 300 sq. ft. (3.78 L / 27.9 m²) and allow to dry until it can be walked on without sticking to shoes (1 hour minimum to 24 hours maximum.) GacoFlex A-38 acrylic elastomeric coating should be applied the same day as the primer.

Top Coats and Texture: Apply two texture top coats each consisting of ¾ gallon (2.84 L ) of GacoFlex A-38 acrylic coating and ¾ pound or 2 cups (.34kg) GacoShell per 100 sq. ft. ( 9.3 m²). Thoroughly blend GacoShell granules into coating before applying.

Allow the first coat to dry until firm enough to walk on but no more than 72 hours before applying second coat. If left longer than 72 hours, deck must be cleaned with liquid detergent, rinsed thoroughly and allowed to dry completely before proceeding.

Best results are achieved by applying texture coats in parallel overlapping roller passes, i.e., North-South or East-West. This will result in a pleasing uniform texture which is easy to clean. Allow 48 hours before deck is put into use.

For best appearance, GacoDeck should be washed as needed to remove natural soil accumulation. This is best done using Gaco Western's D-09 cleaning solution. Wash and water rinse. For general cleaning and maintenance, mix as required up to 9 parts water to one part D-09. This procedure will maintain natural color during many years of service.