May be applied to new concrete immediately after final trowel or to existing concrete of any age. Proper surface preparation and product application is essential to performance
Harden X
1. Prepare The Surface
Always test the surface to be treated for suitability and desired results. Let surface dry before assessing results of test application.
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Clean the surface thoroughly, removing all contaminants like dust, wax, curing compounds, oils, or residues.
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For new concrete, clean saw-cut residue using vacuums, sweepers, or damp mopping. Let the surface dry completely.
2. Apply Harden X
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Use a sprayer (high-volume/low-pressure, pump-up, airless, backpack, or mechanical) to apply Harden X™ evenly at 400–500 sq/ft per gallon( 10-12 m2 per liter).
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Avoid puddling; lightly broom out any pooled material immediately.
3. Keep The Surface Wet
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Ensure the surface stays wet with Harden X™ for 30 minutes to allow proper reaction.
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If areas start to dry, apply more Harden X™
*Do Not Use Water
4. Dry & Cure
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After 30 minutes of keeping the surface wet, allow the material to dry.
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Drying typically takes 1–2 hours. The surface will be ready for traffic once fully dry.
Apply
Full Instructions
Equipment
Needed For Application
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Soft Broom or 100% polyester microfiber pads (to spread out any excess material)
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Horizontal application: high-volume/low pressure, pump-up, airless backpack, or mechanical sprayer.
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Vertical application: sprayer or roller with a 3/4 " nap.
Modification for Acid-Stained or Integrally-Colored Concrete: After keeping surface wet for 30 minutes, spray water on the surface to saturate it completely. To ensure a uniform finish, do not let any area of the surface dry prior to cleaning. Remove excess residue with a scrubber equipped with a red pad. With the squeegee down, vacuum on, and light head pressure, add water, scrub, and clean the surface to remove all excess residue. Dispose of excess material according to local regulations.
Tilt-up Construction Application
Harden X may be applied to existing, cured concrete of any age that is structurally sound.
1. Mechanically remove any surface laitance and patch or fill any cracks or other surface damage.
2. Remove dirt, dust, oil, grease, membrane-forming curing compounds, coatings, sealers, or other contaminants or substances that may interfere with penetration.
3. For maximum penetration, sand blast or shot blast concrete with a 60-100 grit sanding screen or diamond abrasive pad. SealSource® recommends mechanical surface preparation when possible, however older concrete may require more aggressive preparation. If using acid etch or other chemical preparation, the surface MUST be neutralized with a pH neutral cleanser to prevent whiting. (Please call SealSource® technical support for specific instructions.)
4. Remove any remaining dirt, contaminants, and dust caused by grinding with a riding or walk-behind scrubbing machine with water or broom following by a water rinse. Squeegee dry or allow to dry completely prior to application.
5. Using a HVLP, pump-up, airless, backpack, or mechanical sprayer apply Harden X™ at 400-500 sq/ft per gallon (10-12 m2 per liter), maintaining a consistent, even spray. Do not allow the material to puddle (lightly broom out any excess material immediately after spraying).
6. The entire surface MUST remain wet with Harden X™ for 30 minutes to allow the material to react properly with the surface. DO NOT LET ANY AREA DRY OUT – apply more Harden X™ if necessary to keep the surface wet – DO NOT USE WATER. After the wet material has reacted with the surface for 30 minutes, allow material to dry.) Material should dry in 1-2 hours and will be ready for traffic as soon as it dries.
Vertical Application
Prepare surface as directed above for either new or existing concrete and apply using one of the following methods:
Spray Method: Apply Harden X™ from the bottom up using a low pressure, 10-24 psi sprayer (68.9 – 172 kPa). Flood surface until excess runs down 6-8 inches (15-20 cm) below spray pattern, or sponge to create a uniform wet appearance. On horizontal surfaces, property quantity is indicated when the material stands on the surface for a few seconds before completely penetrating. For maximum vertical penetration and desired coverage rates, “wet-on-wet” application is recommended. Re-apply Harden X™ as above within 3-5 minutes after initial application. Use a broom to distribute any accumulated material.
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Roller Method: If applying with a brush or roller, apply in multiple coats until the surface remains moist for approximately one minute before the material disappears. Use a broom to distribute any accumulated material.
Application In Extreme Weather Conditions
High Humidity – Apply Harden X™ as above. After the material has reacted for 30 minutes, remove any excess material that has not penetrated the surface. Do not allow excess material to air- dry.
High Temperatures (Above 90°F or32°C) – To prevent Harden X™ from flashing/drying too quickly, the area to be treated may be sprayed with water to cool the surface prior to application. Allow the surface to dry completely before applying the material. Harden X™ may also be applied by spraying out at 800-1000 sq/ft per gallon (30-40 m2 per liter) in three thin coats, using 100% polyester microfiber pads to spread the material.
Low Temperatures (Below 40°F or 4°C) – Apply Harden X™ as above. While keeping the surface wet for 30 minutes, agitate the material using red pads on a scrubbing machine, floor machine or swing buffer. Because of the need to agitate the material once it has been applied, apply to a smaller square footage which can be successfully managed.
*DO NOT ALLOW MATERIAL TO FREEZE*
Product Disclaimers
Harden X™ is not suitable for asphalt or other non-concrete surfaces.
Harden X™ will not bridge or fill cracks and will not salvage structurally unsound surfaces.
Harden X™ is not recommended for plastic concrete or mortar- or resin-based terrazzo mixes.
Do not allow Harden X™ 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.
Application and coverage rates are estimated and may vary depending on the porosity of substrate and environmental conditions present during application (such as extreme temperatures or humidity). For precise rates of consumption, a pre-application field test should be performed.
DO NOT ALLOW SEALSOURCE® PRODUCTS TO FREEZE
It is highly recommended that the installer contact our Technical Support department at (800) 305-9144 for customized instructions prior to application. Proper application is the responsibility of the user.
