Earth Shield Type 125CR - Chemical Resistant Strip Waterstop

Product Overview

Earth Shield Type 125CR is a specialized chemical resistant strip waterstop composed of nitrile rubber (NBR) and mastic designed to prevent the passage of aqueous hydrocarbons through non-moving concrete joints in environmental engineered concrete structures. This product represents a critical solution for industrial applications requiring robust fluid containment.

Physical Specifications

Dimensions and Form

The waterstop features the following specifications:

• Width: 32mm
• Height: 13mm
• Shape: Trapezoidal section
• Supply Format: 5.08m rolls
• Color: Grey
• Product Code: FC000325-UNIT

Material Properties

Chemical Resistance

Outstanding Resistance to Deleterious Fluids

Earth Shield Type 125CR demonstrates excellent chemical resistance to a comprehensive range of aqueous solutions and industrial fluids, including:

• Acids - Direct acid resistance
• Oils - Including petroleum-based and hydrocarbon products
• Alcohols - Alcohol-based chemical solutions
• Ketones - Ketone compounds
• Glycols - Glycol-based solutions
• Esters - Ester compounds
• Hydrocarbons - Aqueous hydrocarbon mixtures

This broad spectrum of chemical resistance makes the product ideal for environments with exposure to aggressive industrial chemicals and petroleum products.

Typical Applications

Earth Shield Type 125CR is specifically designed for use in the following industrial settings:

• Primary and Secondary Containment - Dual-level containment systems
• Refineries - Petroleum processing facilities
• Chemical Plants - Manufacturing and processing facilities
• Acid Storage - Dedicated acid containment structures
• Mining Facilities - Industrial mining operations
• Fueling Depots - Petroleum product storage and distribution centers

Installation Method

The installation process involves several critical steps:

Surface Preparation

• Concrete must be dry and cured for at least 24 hours
• Steel reinforcing bars must not interfere with proper positioning
• Remove loose particles, dirt, and contamination

Primer Application

• Earth Shield Type 125CR Primer is applied to the dry concrete surface
• Primer is brushed as a 50mm wide continuous coat along the joint
• The primer bonds aggressively to substrates and is unaffected by rain or wet conditions
• Allow primer to become touch dry before waterstop installation

Waterstop Placement

• The waterstop must be centered in and run the full extent of the joint
• Minimum 50mm concrete cover must be maintained to the edges
• Press the strip firmly and continuously in place over the primed area
• Waterstop is placed during the first concrete pour

Mechanical Fastening (When Necessary)

• On vertical, damp, or green concrete, mechanical fastening is required
• Fastening begins 25mm from each coil end
• Proceed with fastening at 250mm on-center spacing along the length

Joint Finishing

• Butt splice joints - Coil ends are cut square and pressed together without separation or air pockets
• Separation paper must be removed immediately prior to the second concrete pour
• Concrete is placed and thoroughly vibrated to obtain impervious, void-free concrete
• Vibrator must not contact the waterstop strip

Key Advantages

• Superior Chemical Resistance - Prevents passage of aqueous hydrocarbons and other deleterious fluids
• Weather Resistant - Unaffected by rain and wet conditions during installation
• Aggressive Bonding - Requires minimal surface preparation with primer-based adhesion
• Environmental Protection - Ideal for structures containing or managing hazardous materials
• Long Service Life - Maintains integrity across specified temperature ranges

Associated Products

Earth Shield Type 125CR Primer

The specialized primer for this waterstop system includes:

• Product Code: FC000326-3.8L
• Container Size: 3.8 litre pails
• Coverage: Approximately 700m of 50mm wide strip per pail
• Color: Red
• Solids Content: >36%
• Application Temperature: Minimum 4°C
• Drying Time: 10 minutes @ 25°C; 60 minutes @ 4°C
• Water-Based Formulation - Designed for concrete, plastic, metal, and wood substrates

Quality and Compliance

All installation instructions and safety information are documented in comprehensive technical data sheets available from the Fosroc website. In emergency situations, the Poisons Information Centre (phone 13 11 26 within Australia) or a doctor should be contacted for health and safety advice.

References

• [1] Earth_Shield_TDS.pdf
• [2] Earth_Shield_Type_125CR_TDS.pdf
• [3] Earth_Shield_Type_125CR_Primer_TDS.pdf