Prime surface as required with HyppoCoat PC (mixture of Side-A & Side-B) at a rate of 1 gallon per 300 sqft (0.14 liters/sqm) or 300 sqft/gallon. Apply using a brush or phenolic core roller. This will result in 3 dry mils (76 microns) of coating.

Rough and pin-holed concrete surfaces may require more primer. Discovery of these issues is generally revealed in the mockup.

Do not allow primer to puddle; dry roll excess primer with a dry nap roller to pick up excess primer in puddles and overlaps. Priming is optional on clean plywood and concrete. Pinholed Surfaces should be filled with primer in order to prevent outgassing of the concrete and allow primer to completely dry before applying coating.

HyppoCoat GC should be thoroughly mixed using a mechanical mixer at slow speed to ensure a homogeneous material. Take care not to allow entrapment of air into the material.

Concrete surfaces require a medium sandpaper finish equal to or greater than an ICRI CSP #3. Surface preparation may be completed by shot blasting or the use of an appropriate cleaner. Peel and adhesion tests are recommended.

Install a 100-200 sqft (9.30-18.58 sqm) mockup of the system to be installed and approve for actual coverage rates and functionality before proceeding.

*Refer to General and Safety Guidelines for complete information

All surfaces must be unpainted/unsealed, clean, dry and free from all contaminants which will inhibit the penetration of HyppoCoat GC into pores. Any curing, scaling or coating agents must be chemically or mechanically removed. If acid is used in the cleaning process, neutralize the surface and rinse well.

Concrete surfaces require a medium sandpaper finish equal to or greater than an ICRI CSP #3. Surface preparation may be completed by shot blasting or the use of an appropriate cleaner. Peel and adhesion tests are recommended.

Install a 100-200 sqft (9.30-18.58 sqm) mockup of the system to be installed and approve for actual coverage rates and functionality before proceeding.

*Refer to General and Safety Guidelines for complete information

HyppoCoat GC may be applied directly with a brush, squeegee, trowel or phenolic core roller in as little as 24 hours. Apply

HyppoCoat GC evenly over the primed surface (Primer is optional on plywood and CMU) at a rate of 120 mils in a single lift to speed application without sacrificing performance.

It can also be applied in multiple lifts to achieve 215 mil high-build system when maximum protection is required.

For specific design requirements, please contact Barrett directly.

Apply HyppoCoat GC over all primed joints and cracks. Bridge the joints and cracks with 3 inch (7.6 cm) Polyester Tape, pushing it into the sealant with a trowel. Over reinforcement tape, apply a thin coat of HyppoCoat GC and smooth onto adjacent surface.

At 70°F (21°C) and 50% relative humidity, allow each coat a minimum of 16 and a maximum of 48 hours to fully cure. If more than 48 hours pass between coats, the surface must be re-primed.

HyppoCoat GC is very sensitive to heat and moisture. Higher temperatures and/or high humidity will accelerate the cure time. Use caution in thickness of application. Limit single coat thickness to 30-40 wet mils.

Equipment should be cleaned with an environmentally safe solvent, as permitted under local regulations, immediately after use.

HyppoCoat GC, in its original, factory-sealed container, has a shelf life of one year from the date of manufacture when stored indoors at a temperature between 60 - 90°F.

• Surfaces must be dry, clean and free of foreign matter.
• Not UV stable.
• Can not withstand direct wear or abrasion.
• Containers that have been opened must be used as soon as possible.
• Do not dilute under any circumstance.
• Green concrete should be cured a minimum of 72 hours before applying green concrete coating HyppoCoat GC-H (Horizontal grade) or HyppoCoat GC-V (Vertical Grade).

The following conditions must not be coated with Barrett deck coating systems or products:

• On grade or below grade slabs
• Split slabs with buried membrane
• Sandwich slabs with insulation
• Slabs over unvented metal pan
• Suspended pool
• Swimming pool decks
• Areas where hydrostatic pressure is or may be present, without the use of Ram Primer & Surface Conditioner and asphalt surfaces
• Asphalt overlays without the express written consent of Barrett

Deck Coating is not recommended over magnesite, gypsum lightweight and where chained or studded tires may be used. Concrete must exhibit 3000 psi minimum strength. An ICRI CSP 2-3 surface or greater is required for concrete surfaces to be coated.

New surfaces to be coated must be trowel finished in compliance with the American Concrete Institute (except that hand troweling is not required), followed by a fine hair brooming, left free of loose particles, and shall be without ridges, projections, voids and concrete droppings that would be mechanically detrimental to coating application or function. Light broom finished concrete should be power-washed before coating application.

Concrete cleaning (see General and Safety Guidelines). Surface preparation may be completed by shot blasting or the use of an appropriate cleaner. Peel and adhesion tests are recommended.