Earth Shield Type 125CR - Chemical Resistant Strip Waterstop

Product Overview

Earth Shield Type 125CR is a specialized chemical resistant strip waterstop engineered to prevent the passage of aqueous hydrocarbons and other deleterious fluids through non-moving concrete joints in demanding industrial environments. This product represents a critical waterproofing solution for applications requiring exceptional chemical resistance and durability.

Composition and Material Properties

Material Composition

Earth Shield Type 125CR is composed of nitrile rubber (NBR) and mastic, creating a chemically resistant composite. The nitrile rubber provides superior resistance to oils and hydrocarbons, while the mastic component delivers adhesive properties essential for substrate bonding.

Physical Dimensions and Specifications

The waterstop features the following specifications:

• Width: 32mm
• Height: 13mm
• Cross-sectional Shape: Trapezoidal
• Supply Format: 5.08 meter rolls
• Product Code: FC000325-UNIT

Key Physical Properties

Chemical Resistance Properties

Deleterious Fluids Resistance

Earth Shield Type 125CR demonstrates exceptional chemical resistance to a comprehensive range of aqueous solutions and hazardous fluids:

• Acids - Proven resistance to acidic environments
• Oils - Outstanding protection against petroleum oils and hydrocarbon-based contaminants
• Alcohols - Resistant to alcohol-based solutions
• Ketones - Protection against ketone-containing fluids
• Glycols - Resistance to glycol solutions
• Esters - Chemical resistance to ester compounds
• Aqueous Hydrocarbons - Specifically designed to prevent passage of aqueous hydrocarbons

Chemical Resistance Testing

The waterstop's chemical resistance is validated according to ASTM D471, meeting or exceeding specific testing standards for industrial applications.

Typical Applications

Earth Shield Type 125CR is deployed across diverse industrial sectors requiring reliable fluid containment:

• Primary and secondary containment facilities
• Refineries - for petroleum processing environments
• Chemical plants and acid storage facilities
• Mining facilities - in ore processing and containment areas
• Fueling depots - for fuel storage and distribution containment
• Environmental engineered concrete structures designed for hazardous fluid management

Installation System

Associated Primer Product

Earth Shield Type 125CR Primer (Product Code: FC000326-3.8L) is the essential bonding agent used during installation. Key characteristics include:

• Function: Aggressively bonds the waterstop to concrete substrates
• Weather Resistance: Unaffected by rain or wet conditions during installation
• Application: Applied as a 50mm wide continuous coat along the joint
• Substrate Compatibility: Bonds aggressively to most substrates

Installation Process

The installation procedure encompasses several critical steps:

1. Substrate Preparation: Concrete must be dry and cured for at least 24 hours before waterstop installation
2. Surface Cleaning: Remove loose particles, dirt, and contamination from concrete surfaces
3. Primer Application: Apply Earth Shield Type 125CR Primer in a 50mm wide continuous coat along the joint
4. Touch Dry Period: Allow primer to become touch dry prior to waterstop application
5. Waterstop Placement: Center waterstop in joint and run full extent of the joint with minimum 50mm concrete cover to edges
6. Firm Pressing: Press strip firmly and continuously in place over primed area
7. Joint Splicing: Butt coil ends together ensuring no separation and no air pockets
8. Mechanical Fastening: On vertical, damp, or green concrete, mechanically fasten waterstop (starting 25mm from coil ends, proceeding 250mm on center)
9. Joint Inspection: Inspect waterstop immediately prior to second concrete pour for damage and contamination
10. Separation Paper Removal: Remove separation paper immediately before second concrete pour
11. Concrete Vibration: Thoroughly vibrate concrete around waterstop to obtain void-free concrete and maximize intimate contact

Installation Constraints

• Steel reinforcing bars must not interfere with proper positioning of the waterstop
• Concrete vibrators must not contact the strip waterstop directly
• Concrete placement should not displace the waterstop from its centered position

Performance Characteristics

Temperature Resistance

Earth Shield Type 125CR maintains performance across a broad temperature range:

• Service Temperature: -30°C to 95°C

Mechanical Properties

• Ductility: 15% @ 25°C - providing flexibility in joint movement
• Penetration Cone Value: 60-70mm @ 25°C - indicating appropriate deformation characteristics
• Softening Point: 149°C - demonstrating thermal stability in elevated temperature environments

Manufacturer and Distribution

Fosroc manufactures Earth Shield Type 125CR. The product is distributed through authorized suppliers:

• Australia: Parchem Construction Supplies Pty Ltd
• New Zealand: Concrete Plus Ltd

Advantages

Earth Shield Type 125CR offers multiple significant advantages:

• Chemical Resistance: Broad spectrum resistance to deleterious fluids including acids, oils, and aqueous solutions
• Weather Resistant Installation: Primer unaffected by rain or wet conditions during application
• Aggressive Bonding: Mastic component ensures superior adhesion to concrete substrates
• Comprehensive Coverage: Suitable for non-moving joints across diverse industrial applications
• Standardized Testing: Validated performance according to ASTM D471 chemical resistance standards

Supply and Ordering

References

• [1] Fosroc_Nitoproof_410_TDS.pdf
• [2] Earth_Shield_Retrofit_TDS.pdf
• [3] Earth_Shield_Type_125CR_TDS.pdf
• [4] Fosroc_Hydrocor_Corkjoint_Type_3_TDS.pdf
• [5] Fosroc_Nitoproof_510_TDS.pdf