Concure CR - Chlorinated Rubber Based Concrete Curing Compound

Overview

Concure CR is a solvent-based chlorinated rubber curing compound engineered to cure, seal, and harden concrete surfaces. It consists of a processed blend of chlorinated rubber and modifying agents dispersed in Xylene, creating a stable, transparent, quick-drying liquid that enhances concrete strength and durability during the critical early curing phase.

Composition and Chemical Makeup

Concure CR's formulation combines three key components:

• Chlorinated Rubber: The primary active ingredient that provides curing and sealing properties
• Modifying Agents: Components blended with chlorinated rubber to optimize performance
• Xylene: The solvent carrier that maintains the product as a mobile, transparent liquid

This combination creates a protective membrane that promotes efficient concrete hydration while eliminating the need for traditional wet curing methods.

Primary Uses

Concure CR is typically applied to:

• Freshly laid concrete floors immediately after final trowelling
• Vertical concrete areas following formwork removal to assist strength development
• Structural and mass concrete both indoors and outdoors
• Areas requiring improved chemical resistance during construction

Key Advantages

The product delivers multiple performance benefits:

• Enables more efficient concrete hydration by retaining moisture at the surface
• Increases concrete strength and dusting resistance
• Improves chemical resistance of concrete surfaces during construction
• Eliminates traditional curing methods including damp hessian, sand, and polythene
• Rapid film formation for quick coverage
• Odourless when dry, facilitating site cleanliness
• Facilitates job cleanup and maintenance of the coated surface

Standards Compliance

Concure CR meets stringent regulatory standards:

• Australian Standards AS3799: Complies as a Class C, Type 1 curing compound
• Water retention efficiency: 94% at 5m²/litre (exceeding the >90% requirement)
• Boral test certificate 648/20 available upon request

Technical Specifications and Properties

Property	Value
Water Retention Efficiency	94% (AS3799.3.1.2)
Non-volatile Content	18.29% (AS3799.3.1.2)
Density	0.942 kg/L (AS3799.3.1.9)
Viscosity	0.01 Pa.s (AS3799.3.1.5)
VOC Content	760g/litre
Drying Time	3 hours (AS3799.3.1.4)
Colour	Clear, light honey coloured
Appearance	Transparent, quick-drying mobile liquid

Application Instructions

New Concrete Surfaces

Concure CR should be evenly sprayed over freshly laid concrete as soon as possible after final trowelling. Ideally, application should commence as soon as the surface bleed water has evaporated, typically 1 to 2 hours depending on ambient temperature and atmospheric conditions.

Application Rate

• Coverage Rate: 5 square metres per litre
• Dry Film Thickness: Minimum 35 microns (achieved through single coat application)
• Application at the specified coverage rate ensures correct curing properties

Special Applications and Compatibility

Use with Metallic-Based Floor Hardeners

Concure CR is specifically recommended as an alternative to Concure A99 when used with metallic-based integral floor hardeners. This compatibility prevents rust and ensures proper performance with metal-containing hardening systems.

Compatibility with Nitoflor FC100

Concure CR serves as an approved curing compound substrate before applying Nitoflor FC100, a high-performance floor coating. When Concure CR is used as a preparatory base, single-coat application of Nitoflor FC100 may be suitable in certain cases, depending on project specifications and requirements.

Chemical Resistance Limitations

Resistant Substrates

Concure CR is NOT resistant to the following chemical substances:

• Sulphur dioxide (important consideration for certain environments)
• Oxidising agents (sodium hypochlorite, bromine water)
• Concentrated acetic acid, concentrated phosphoric acid, concentrated nitric acid
• Chromic acid and concentrated ammonia
• Animal fats and oils, synthetic oils (brake fluid, transmission fluids)
• Vegetable oils and higher fatty acids (oleic acid)
• Solvent types: Aromatic hydrocarbons, esters, ketones, and chlorinated solvents

This limitation should be carefully considered during material specification and site assessment phases.

Storage and Shelf Life

• Shelf Life: 5 years if kept in original unopened packs
• Storage Conditions: Cool, dry conditions away from sources of heat and naked flames
• Temperature Impact: Shelf life may be reduced at high temperatures and/or high humidity conditions

Limitations and Restrictions

Application Restrictions

• Certain adhesives for vinyl tiles and resilient flooring may be applied only after concrete is thoroughly cured and a test area has been approved
• Cement-based renders and toppings should not be applied directly over Concure CR; the product must first be removed by grit blasting or grinding to provide a mechanical key
• Bond failure is likely if applied to substrates subject to back water pressure or where extraneous salt particles are carried to the interface by vapour or condensation

Appearance Characteristics

• Clear appearance with slight yellow cast is obtained
• Concure CR will yellow when subject to ultra-violet radiation from sunlight

Cleaning and Equipment Removal

Concure CR should be removed from tools and equipment using Fosroc Solvent 10, ensuring proper maintenance of application equipment.

Supply and Coverage

Container Size	Product Code
200 litre drum	FC662025-200L

Coverage: 5m² per litre (theoretical coverage; practical coverage will be reduced due to wastage factors and substrate variation)

Safety and Documentation

A Safety Data Sheet (SDS) is available from the Fosroc website and must be read carefully prior to use, as application or performance data may change from time to time. In emergencies, contact the Poisons Information Centre (phone 13 11 26 within Australia) or a doctor for advice.

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References

• [1] Fosroc_Concure_CR_TDS.pdf
• [2] Fosroc_Nitoflor_FC100_TDS.pdf
• [3] Fosroc_Concure_A99_TDS.pdf