Nitoproof 310: Fibre Enhanced Latex Waterproofing Membrane

Product Overview

Nitoproof 310 is a fibre-enhanced single component water-based latex waterproofing membrane specifically engineered for wet area applications. It is ideally suited as a general-purpose under-tile wet area membrane designed for covering with tiles, screeds, and concrete beds in moisture-exposed environments.

Key Features and Advantages

Nitoproof 310 offers several distinctive characteristics that make it suitable for waterproofing applications:

• Low VOC (Volatile Organic Compound) Content - Environmentally conscious formulation with minimal odor and health hazards
• Non-Hazardous - Safe for user application with reduced health and safety concerns
• Elastomeric and Flexible Properties - Once cured, the membrane exhibits excellent elastomeric properties with good tensile strength, allowing it to flex and accommodate minor substrate movement
• Non-Re-emulsifying - Once cured, the membrane will not re-emulsify or soften when exposed to water
• Excellent Chemical Resistance - Provides robust protection against various chemical exposures
• Superior Adhesion - Demonstrates excellent adhesion properties to primed building substrates
• Tile Adhesive Compatibility - Fully compatible with polymer-modified cement-based tile adhesives, screeds, and renders
• Australian Made - Manufactured locally, supporting domestic production

Typical Applications

Nitoproof 310 is ideally suited for the following applications:

• Wet areas and shower alcoves in residential and commercial buildings
• Under-tile balcony areas requiring waterproofing protection
• Under-tile terrace areas for outdoor moisture protection
• Sandwich seal applications between existing and new substrates (e.g., old to new concrete, cement screeds over concrete, and CFC surfaces)

Technical Specifications

Wet Form Properties

Property	Value
Specific Gravity	1.3 kg/litre
Solids Content	>64%
Appearance	Thixotropic paste
Colour	Light Grey
VOC Content	17 g/litre

Cured Membrane Properties (AS 4858:2004)

Property	Performance
Elongation at Break	504% (Class III) with tensile strength of 2.25 MPa
Elongation after 56 days water immersion	412% (Pass)
Elongation after 28 days bleach immersion	432% (Pass)
Elongation after 56 days detergent immersion	330% (Pass)
Elongation after heat ageing (7 days @ 50°C)	545% (Pass)
Resistance to cyclic movement	Pass
Water Vapour Transmission (ASTM E96:2016)	0.56 g/m²/24hr
Water Absorption (AS3558.1:1999)	Maximum 1.58%

Drying Times at 23°C

The curing timeline for Nitoproof 310 is critical for project scheduling:

Stage	Duration
Recoat Time	2 to 4 hours
Dry Film	8 to 12 hours
Flood Testing	7 days
Resistance to Ponding Water	7 days
Tiling/Toppings	24 hours

Note: At lower temperatures (10°C), allow a minimum additional 24 hours of drying time.

Design and Application Criteria

Application Method and Coverage

Nitoproof 310 is designed to be applied by thick brush or roller. The recommended application specification is:

• Minimum Number of Coats: 2 coats
• Minimum Wet Film Thickness: 1.5 mm (total for both coats)
• Coverage Rate: 1.5 litres/m² for 2 coats
• Minimum Dry Film Thickness: 1.2 mm
• Coverage Per 15L Drum: Approximately 10 m²

The two coats should be applied at 90-degree angles to each other to ensure complete coverage and optimal reinforcement of the waterproof barrier.

Surface Temperature Requirements

Application of Nitoproof 310 must comply with strict temperature conditions:

• Minimum Surface Temperature: 5°C
• Maximum Surface Temperature: 30°C

Important: These conditions refer to surface temperature, not ambient temperature, as substrate temperature can differ significantly from air temperature.

Standards Compliance

Nitoproof 310 has undergone rigorous independent testing and meets the following standards:

• AS/NZS 4858:2004 - Wet Area Membrane (Class III membrane)
• AS 3740:2021 - Waterproofing of Wet Areas Within Residential Buildings
• CSIRO Test Report SW8500 - Provides documented compliance verification

Copies of compliance reports are available from the Fosroc website.

Surface Preparation Requirements

Proper substrate preparation is essential for optimal performance:

Surfaces must be clean, sound, stable, and completely free of:

• Loose foreign material and debris
• Existing coatings and degraded finishes
• Laitance (concrete surface residue)
• Release agents and curing compounds
• Oil, grease residues, and contaminants

Moisture Content Specifications

Concrete and masonry substrates must have a moisture content reading not exceeding 5% when tested using a Tramex CMEX5 moisture meter to ensure proper adhesion and membrane performance.

Priming Requirements

Substrates must be primed prior to Nitoproof 310 application:

For Porous Masonry Surfaces:

• Nitoprime 120 applied at approximately 7 m²/L, OR
• Nitoproof 510 (more robust alternative) applied at 5 m²/L

For Non-Porous Substrates (such as CFC, wet area timber, ceramic tile, metals, and plastics):

• Nitoprime 115 applied at approximately 12 m²/L

Crack and Joint Treatment

Static Cracks <2mm:

• Clean thoroughly and fill with neutral-cure silicone (such as Nitoseal SC100)
• Allow sealant to skin over
• Apply 1.5 mm thick pre-treatment coat of Nitoproof 310 extending 100 mm either side
• Allow 2-3 hours cure before general membrane application

Movement Joints and Cracks >2mm:

• Fill with neutral-cure silicone such as Nitoseal SC100
• Allow skin formation
• Place 50 mm wide polyethylene tape over the crack
• Apply 1.5 mm thick pre-treatment coat of Nitoproof 310 extending 100 mm either side
• Alternatively, use the Nitoband tape system as a superior bond-breaker solution

Product Supply

Nitoproof 310 is supplied in convenient 15-litre drums:

Product	Product Code
Nitoproof 310	FC000602-15L

Storage Conditions

• Store in original unopened containers
• Maintain cool, dry storage conditions
• Temperature range: 5°C to 30°C
• Storage above 30°C may reduce shelf life

Cleanup and Removal

Wet State: Nitoproof 310 cleans up easily with water while in wet state

Dried Material: Once cured, removal requires either:

• Fosroc Solvent 10 treatment, OR
• Mechanical means (scraping or grinding)

Limitations

• Not Designed for UV Exposure - Nitoproof 310 is not intended for use as a UV-exposed membrane and must be covered with tiles, screeds, or other protective finishes
• Temperature Restrictions - Should not be applied when surface temperatures fall below 5°C or exceed 30°C

Important Safety Note

A Safety Data Sheet (SDS) is available from the Fosroc website and must be read carefully prior to use. In emergency situations, contact any Poisons Information Centre (phone 13 11 26 within Australia) or a doctor for immediate advice.

References

• [1] Fosroc_Nitoproof_310_TDS.pdf