Product Facts
- Product Name
- Flamex One - Fire Rated Acrylic Joint Sealant
- Price
- Available
- Availability
- In Stock
- Condition
- New
- Category
- Construction Materials > Sealants & Adhesives
- Seller
- Fosroc Workspace
- MPN
- FC920025-600ML
Flamex One - Fire Rated Acrylic Joint Sealant
Flamex One is a fire rated, one-component, acrylic joint sealant for sealing low movement interior joints requiring a fire rating of up to 4 hours. Suitable for partition walls, concrete walls, tilt-up construction, precast and insitu concrete, service penetrations, and window/door frame perimeters. Joint movement capability of +/- 10% (20% total) with joint sizes from 6mm to 30mm wide.
Flamex One is a fire rated, one-component, acrylic joint sealant for sealing low movement interior joints requiring a fire rating of up to 4 hours. Suitable for partition walls, concrete walls, tilt-up construction, precast and insitu concrete, service penetrations, and window/door frame perimeters. Joint movement capability of +/- 10% (20% total) with joint sizes from 6mm to 30mm wide.
Price: Available
Brand: Fosroc
Product Data (OpenAI Spec)
View Full JSON Spec ↗Specifications
| Condition | new |
|---|---|
| Category | Construction Materials > Sealants & Adhesives |
Product Intelligence
Flamex One - Fire Rated Acrylic Joint Sealant
Overview
Flamex One is a fire-rated, one-component, acrylic joint sealant specifically designed for low movement interior applications. It features an economical waterborne formulation that provides up to 4 hours of fire resistance while maintaining excellent application and finishing characteristics.
Key Features and Advantages
Flamex One offers several distinctive benefits for interior construction applications:
- Economic Waterborne Formulation - Cost-effective, water-based composition reducing environmental impact
- Quick Drying - Rapid curing allows faster project progression
- Permanently Flexible and Paintable - Maintains flexibility after curing and accepts paint finishes
- Slump Resistant - Non-sag properties make it suitable for wide joints without sagging
- Fire Resistance - Up to 4 hours fire resistance capability
- Good Adhesion - Bonds effectively to most common building materials
- Easy Application and Finishing - Simple to apply and achieves smooth finishes
Product Specifications
Physical Properties
| Property | Specification |
|---|---|
| Form | Single part non-sag mastic |
| Colour | Concrete grey |
| Physical/Chemical Change | Dries by water loss |
| Application Temperature | 5°C - 50°C |
| Skinning Time | 20 minutes at 25°C, 50% RH |
| Cure Rate | Approximately 1 mm per day at 25°C, 50% RH |
| Movement Accommodation Factor (MAF) | ±10% (20% total) |
| VOC Content | 14.4 g/litre |
Applications and Uses
Flamex One is designed for sealing low movement interior joints requiring fire resistance in the following construction types:
- Tilt-up Construction - Sealing joints in tilt-up concrete wall systems
- High and Low Rise Construction - Interior fire-resistant joint sealing in multi-story buildings
- Precast Concrete - Sealing joints between precast concrete wall panels and components
- In-situ Concrete - Interior joint sealing in cast-in-place concrete construction
Design Criteria and Joint Configuration
Flamex One can be used in joints ranging from 10mm to 20mm wide. The sealant depth should ideally be half the width with a minimum depth of 10mm. However, the joint configuration must be considered with reference to the required fire resistance rating achieved in testing.
Joint Backing
Expandafoam Closed Cell backing rod must be used as backing material to achieve the correct joint configuration and optimal performance.
Fire Resistance Performance
Flamex One has been tested to AS1530.4:2014 fire resistance standards. The following table summarizes fire rating test results achieved in joints between concrete wall panels 120mm thick:
| Joint Size | Configuration | Integrity (min) | Insulation (min) | FRL |
|---|---|---|---|---|
| 20mm x 20mm | Sealed fire side only | 250 | 50 | -/240/30 |
| 20mm x 10mm | Sealed non-fire side only | 250 | 107 | -/240/90 |
| 20mm x 10mm | Sealed both sides | 250 | 166 | -/240/150 |
| 20mm x 10mm | Sealed fire side only | 250 | 28 | -/240/- |
Specific test results are available in FireTSLab Report PF21065, with full copies available from the Fosroc website.
Application Instructions
Joint Preparation
The joint surfaces must be:
- Dry, clean, and frost-free
- Free from dust, laitance, form release agents, and curing compounds
Surface preparation should include vigorous wire brushing, grinding, or grit blasting to remove contaminants. Remove rust, scale, and protective lacquers from metal surfaces. Oil or grease must be removed using Fosroc Solvent 10.
Priming
Primers are generally not required on correctly prepared surfaces. On excessively porous surfaces, adhesion can be improved by diluting Flamex One 1:3 with water and brushing this solution into the joint sides.
Tooling
Immediately after gunning Flamex One into joints, the sealant must be well tooled using a smooth tool with a slightly convex edge. A small amount of water may be used to assist tooling. This process ensures:
- Good contact with joint faces
- Optimal surface wetting for adhesion
- Smooth finish appearance
Supply and Coverage
Flamex One is supplied in 600ml sausages packaged in cartons of 20.
Product Code: FC920025-600ML
Coverage: Each 600ml sausage will seal approximately 2 metres of a 25mm x 12mm joint.
Storage and Maintenance
Store Flamex One in original packaging under cool, dry conditions not exceeding 25°C.
Equipment Cleaning
- Uncured Sealant - Clean with water
- Cured Sealant - Requires soaking in water combined with scrubbing for removal
Standards Compliance
- AS1530.4:2014 - Fire resistance testing for building materials
- Copies of full test reports available from Fosroc website
Safety and Documentation
A Safety Data Sheet (SDS) is available from the Fosroc website. Users must read both the SDS and Technical Data Sheet carefully prior to use, as application and performance data may change over time.
In emergency situations, contact any Poisons Information Centre (phone 13 11 26 within Australia) or a doctor for advice.
References
- [1] Fosroc_Flamex_One_TDS.pdf
- [4] Fosroc_Expandafoam_Closed_Cell_TDS.pdf