Sikagard®-300 HD WB

• Recommended for use on all classes of concrete floors as noted in Table 1.1, ACI Standard 302.1R
• USDA compliant for use in meat and poultry areas

Sikagard®-300 HD WB is a magnesium fluorosilicate hardener.

15 months when properly stored.

Store in unopened containers in a cool, dry area between 35° and 85° F (4° and 29° C). Keep from freezing.

*Concrete was cured for 28 days.

ACI Standard 302.1R magnesium fluorosilicate hardeners can be used to increase concrete resistance to chemicals including, but not limited to the following:

To estimate the quantity of Sikagard®-300 HD WB needed for an application, divide the area of the floor by the coverage rate (ft2/gal or m2/L) of mixed material. Multiply this number by the ratio (in the last column). Example: 8,000 ft² floor, moderately troweled: 8,000 ÷ 100 = 80 gallons mixed material x 1.17 = 93.6 gallons of Sikagard®-300 HD WB needed.
Recommendations for the number of applications and the dilution ratios are based on average conditions. Coverage varies with application method, porosity, and texture of concrete.

• If Sikagard®-300 HD WB freezes, warm and restir to uniformity. If separation is persistent, discard the product.
• When transferring Sikagard®-300 HD WB from the original sealed container, use only plastic buckets or pails.
• Small amounts of sediment or a cloudy appearance in the container will not affect product performance.
• Do not apply to uncured concrete; concrete must be properly wet-cured.
• Do not apply Sikagard®-300 HD WB to floors that have been previously sealed or treated with curing and parting compounds unless these products have been chemically or mechanically removed.
• Sikagard®-300 HD WB can be used for exteriors. However, if the surface has been hard-troweled, traffic can polish the surface and make it slippery.
• Although Sikagard®-300 HD WB is chemically resistant, its application in specific chemical environments should be checked with Sika Technical Service.
• For resilient tile applications, conduct an adhesion test.
• Do not apply Sikagard®-300 HD WB to resin-based terrazzo mixes.
• Sikagard®-300 HD WB will not remediate honeycombed or structurally unsound surfaces.
• Do not allow Sikagard®-300 HD WB to dry on terrazzo floors except as indicated in application instructions.
• Do not allow Sikagard®-300 HD WB to come in contact with any glass, fabric, metal, or painted surfaces. Immediately wipe contaminated surfaces with a clean water-saturated cloth, then wipe dry with a second clean cloth.
• For subsequent coating applications, consult the coating manufacturer for surface preparation and application instructions.
• For professional use only; not for sale to or use by the general public.
• Make certain the most current versions of the product data sheet and SDS are being used.
• Proper application is the responsibility of the user. Field visits by Sika personnel are for the purpose of making technical recommendations only and not for supervising or providing quality control on the jobsite.

1. New concrete should be cured per ACI 308 Guidelines. For best results, allow concrete to air dry for at least 72 hours. Concrete should be at least 10 days old and preferably 28 days old before application of Sikagard®-300 HD WB.
2. Surfaces must be clean, dry, and free of contaminants, including carbonation byproducts.

1. The number of applications and dilution ratios for Sikagard®-300 HD WB are dependent on the porosity and density of the concrete. Refer to the coverage chart. Two applications of Sikagard®-300 HD WB are generally required on concrete and non-resin-based terrazzo floors. Wood-floated, broom-finished, or porous floors may require a third application of product at full strength.
2. Apply Sikagard®-300 HD WB by roller, spray, brush, or squeegee. Bubbling indicates the reaction of Sikagard®-300 HD WB with the concrete. Distribute evenly and mop up excess solution or puddles.

Concrete

1. After the first application, allow the floor to dry until no longer visibly wet.
2. If crystals develop during the second application, flush the surface liberally with clean water. Use hot water if available. At the same time, rapidly brush the floor with a stiff-bristled broom.
3. Mop up excess water and allow the surface to dry.

Concrete, Polished Sheen

1. To achieve the appearance of a polished sheen, use 3 applications of Sikagard®-300 HD WB. See the Yield Chart for the dilution ratios of each coat.
2. As the last application is drying, wait for the uniform appearance of white crystals. Flood the floor with water and buff it with a commercial floor buffer using an abrasive pad. Continue buffing until the floor acquires a patina or polish and the whiteness is gone.
3. The above recommendation is for dense, steel-troweled floors. Older or more porous concrete may require a stronger mix, lower coverage rate, or more than three applications.

Caution: unusually wet or oily environments will be more slippery with this surface treatment.

Terrazzo (Non-resin-based)

1. Do not allow the first application to dry. While the surface is still damp, flush it thoroughly with clean hot water and then allow it to dry until no longer visibly wet. For the second application, follow the same procedure but mop up excess wash water and allow the surface to dry.
2. The appearance of white crystals after the first or second application indicates that the mix may be too strong, or that the surface has reached maximum hardness. If this occurs, stop the application and flush the surface with clean, hot water; scrub with a stiff-bristle broom, and allow to dry. Increase the dilution for any remaining applications to minimize crystal formation.

Clean all tools and equipment with water immediately after use. Thoroughly flush sprayers. Dispose of unused material according to local regulations.