GacoFlex® E5691

The A&B components are slightly viscous independently and form a more viscous emulsion when mixed. Becomes water thin when diluted.

GacoFlex E5691 is intended to seal and prime in a single step prior to the application of GacoFlex coating systems over concrete decks. This penetrating sealer and primer is specifically formulated for use on concrete surfaces, but may also be applied to plywood (please refer to General Instructions GW-2-3 Plywood Selection and Installation). GacoFlex E5691 meets ASTM C309 requirements for use as a concrete curing compound (water loss of 0.55kg/m²).

Not intended for application to glass or metal. Not intended for application to green concrete to prepare for the installation of a conventional roofing system.

Up to 400 ft²per gallon (9.84 m²/L) over smooth surfaces such as plywood and lightly etched concrete. For moisture vapor mitigation application, the concrete must be shot blasted or ground to a CSP 2 where one gallon of the combined product will cover 200 ft² yielding 2.6 dry mils. On freshly poured green concrete when used as a curing compound, the coverage rate should also be approximately 200 ft² per gallon to meet the ASTM C309-11 standard for water loss.

Thinning

Do not thin with anything other than clean water after A&B has been properly mixed.

Mixing Instructions

Pour one container of Part A into a short-filled container of Part B. A 5 gallon kit consists of 0.9 gallons of part A poured into a 5 gallon pail short-filled with 1.25 gallons of part B. Mix combined product for two minutes with a power mixer and jiffy-type blade. Dilute with clean water (2.5 gallons for a 5-gallon  kit or ½ gallon for a 1 gallon kit) while mixing for an additional 1 minute.

Pot Life

45 minutes at 77°F. Pot life will be less at higher temperatures. Transferring mixed products to other containers may reduce pot life.

Application

Pour a bead of properly mixed GacoFlex E5691 and spread it over the desired coverage area with a flat squeegee. GacoFlex E5691 is a low viscosity product and will run in front of the squeegee like water. Apply light downward pressure to work the liquid into the substrate. Do not allow the product to puddle. Backroll with a ¼" (6.4 mm) nap roller to ensure uniformity. Do not apply GacoFlex E5691 if the substrate is below 50°F or above 110°F, or when relative humidity is above 85%.

Application of Coats

GacoFlex E5691 should have a clear (not cloudy) appearance and be nearly tack-free before top coating. A topcoat may be added in as little as 2 hours after the water has evaporated. Topcoat within 28 days. The surface should be cleaned to remove any loose dirt or contamination before coating.

Cleanup

Clean up application tools and equipment promptly with soap and water.