Negative-Side Waterproof Coating
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  • Negative-Side Waterproof Coating

Key Technology & Mechanism:

Utilizes proprietary reactive chemicals that penetrate deep into the concrete substrate. Upon contact with moisture, these chemicals catalyze the formation of insoluble crystalline structures within capillaries and micro-cracks. This self-sealing action permanently blocks water migration pathways from within the concrete mass itself.

 

Critical Performance Parameters:

Parameter Value / Performance Test Standard (Typical)
Application Method Brush, Trowel, Spray -
Coverage Rate 0.8 - 1.0 kg/m² per coat (2 coats recommended) -
Mix Ratio Powder : Water = 4 : 1 by weight -
Pot Life (Mixed) ~ 45 minutes (at 20°C / 68°F) -
Curing Time (Touch Dry) ~ 4 hours -
Curing Time (Full Service) 7 days (under moist conditions) -
Bond Strength > 1.8 MPa (260 psi) to concrete ASTM C321
Permeability Reduction Reduces permeability coefficient to < 10^(-12) m/s DIN 1048
Hydrostatic Pressure Resists up to 7 bar (100 psi) head pressure ASTM D5385
Chemical Resistance Resistant to mild acids, alkalis, chlorides, sulfates; pH range 3-11 (long-term) ASTM C267
Vapor Permeability Permeable to water vapor (prevents blistering/pressure build-up) ASTM E96
Service Temperature -35°C to +90°C (-31°F to +194°F) -
Shelf Life (Unopened) 12 months in original packaging -

 

Primary Application Scenarios:

Basements & Underground Structures: Remediating leaking interior walls/floors where exterior excavation is impractical or prohibitively expensive.

Water Tanks & Reservoirs: Repairing leaks from the interior surface without draining.

Tunnels & Subways: Waterproofing the interior lining against groundwater ingress, especially post-construction.

Parking Decks (Below Grade): Addressing leaks from the underside of slabs.

Elevator Pits & Sumps: Sealing against constant water exposure from the inside.

Retaining Walls: Stopping water seepage through the face of the wall.

Concrete Repairs: Integral waterproofing for patch repairs on water-retaining structures.

Marine Structures (Limited): Internal protection for piers, docks (consult for salinity exposure).

 

Key Advantages:

Negative-Side Solution: Uniquely effective where positive-side application is impossible.

Self-Sealing: Crystals grow to seal new micro-cracks formed over time.

Integral Protection: Becomes part of the concrete matrix, cannot be punctured or separated.

Resists Hydrostatic Pressure: Proven performance under high water pressure.

Breathable: Allows trapped moisture vapor to escape, preventing delamination.

Durable & Permanent: Inorganic crystals won't degrade, offering long-term protection.

Potable Water Safe: NSF 61 certified formulations available (specify when ordering).

Easy Application: Brush, trowel, or spray application onto prepared concrete.

 

Installation Notes:

Surface Preparation: CRITICAL. Surface must be sound, clean, structurally intact, and saturated-surface-dry (SSD). Remove laitance, grease, oils, loose material. Etch mechanically (sandblasting, scabbling preferred) or chemically to open pores. Repair major cracks/holes first.

Mixing: Mix powder with clean water to a thick slurry consistency using low-speed drill. Do not overmix. Use within pot life.

Application: Apply first coat forcefully to ensure penetration. Keep moist during curing (misting, wet burlap). Apply second coat perpendicular to first within 6-24 hours (while first coat is still green). Maintain moist cure for minimum 72 hours (ideally 7 days).

Environment: Apply between 5°C (41°F) and 35°C (95°F). Protect from freezing, rapid drying (wind/sun), and rain during application/curing.


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Negative-Side Waterproof Coating

Negative-Side Waterproof Coating
+
  • Negative-Side Waterproof Coating

Negative-Side Waterproof Coating


Utilizes proprietary reactive chemicals that penetrate deep into the concrete substrate. Upon contact with moisture, these chemicals catalyze the formation of insoluble crystalline structures within capillaries and micro-cracks. This self-sealing action permanently blocks water migration pathways from within the concrete mass itself.

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