SISALATION RADIANT BARRIER
Sisalation FR405
Sisalation FR405 is a fire-retardant, double-sided reflective foil radiant barrier for light industrial and commercial roofs. Each 1.25m × 40m roll provides 50m² total coverage and approximately 44m² effective coverage after overlaps.
R-value
Product Overview
Sisalation FR405 is an economical, durable and fire-retardant double-sided reflective foil laminate. It is designed for light industrial and commercial roof applications where radiant heat, dust and moisture control are required.
Each 1.25m × 40m roll provides 50m² total area and approximately 44m² effective coverage after the required overlaps. Typical applications include offices, mini factories, clinics and schools.
Key Benefits
- ✓ Double-sided reflective foil laminate
- ✓ Advanced fire-retardant properties
- ✓ 185g/m² light industrial construction
- ✓ 50m² total roll area
- ✓ Approximately 44m² effective coverage
- ✓ R1.38 downwards system R-value
- ✓ B-s1,d0 fire classification
- ✓ Dustproofing and vapour-barrier properties
Typical Roof Use
FR405 is used as an under-roof or side-cladding insulation membrane in suitable light industrial and commercial buildings.
Technical Product Data
Sisalation FR405 Technical Specifications
These specifications are based on the February 2025 Sisalation FR405 Light Industrial product data sheet.
| Product range | Sisalation |
|---|---|
| Product type | Roofing Insulation |
| Material | Radiant Barrier |
| Grade | Light industrial |
| Appearance | Silver |
| Construction | Double-sided reflective foil laminate |
| Roll width | 1250mm |
| Roll length | 40m |
| Total roll area | 50m² |
| Effective coverage | 44m² |
| Recommended overlap | 150mm |
| Downwards system R-value | R1.38m²·K/W |
| Upwards system R-value | R0.67m²·K/W |
| SANS 428 fire rating | B/B1/2/H&V-SP&USP |
| SANS 53501-1 fire rating | B-s1,d0 |
| Mass per unit area | 185g/m² |
| Approximate roll weight | ±9.1kg |
| Longitudinal tensile strength | 10kN/m |
| Transverse tensile strength | 6kN/m |
| Burst strength | 600kPa |
| Foil-surface emissivity | ≤0.05 |
| Typical applications | Offices, mini factories, clinics and schools |
Roof and Cladding Applications
Where Is Sisalation FR405 Used?
FR405 is intended for light industrial and commercial under-roof and side-cladding applications, with or without sprinkler systems where the product’s classification is suitable for the project.
Offices and Schools
A fire-retardant radiant barrier for suitable office, school and educational building roof systems.
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Mini Factories
Suitable for specified light industrial roofs where reflective insulation and vapour control are required.
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Clinics and Commercial Buildings
Used as an under-roof or side-cladding insulation membrane in suitable clinics and commercial buildings.
View Radiant Barriers →Installation Notes
Sisalation FR405 Installation Guidance
These are general product guidelines. Installation must follow the approved roof design, project specification and current manufacturer instructions.
Need Sisalation FR405 Rolls?
Tell us your roof area and required quantity. We can help estimate the number of rolls and provide a supply quote for Sisalation FR405.
Request a Supply QuoteProduct Documentation
Sisalation FR405 Data Sheet
View the current FR405 Light Industrial product specifications, thermal performance, physical properties and fire classifications.
Sisalation FR405 Data Sheet
February 2025 technical data covering roll dimensions, effective coverage, system R-values, strength and fire classifications.
Sisalation FR405 Information
Frequently Asked Questions
The specified under-tile or sheeting system without a ceiling has an R1.38 downwards system value and an R0.67 upwards system value. Performance depends on the complete installed roof assembly.
A 1.25m × 40m roll provides 50m² total area. Effective coverage is approximately 44m² after allowing for the specified 150mm overlaps.
FR405 is a light industrial product intended for suitable offices, mini factories, clinics, schools and similar commercial buildings.
The February 2025 data sheet records a B/B1/2/H&V-SP&USP classification under the SANS 428 protocol and a newer B-s1,d0 classification under SANS 53501-1.
The product data specifies a 150mm overlap. The complete roof design and installation specification must also be followed around edges, penetrations and adjoining building elements.
FR405 is the lighter light-industrial grade. FR430 is a heavier-duty Sisalation product intended for more demanding industrial and commercial applications.
Need Sisalation FR405 for Your Roof?
Tell us your roof area and the number of rolls you need. We can help calculate coverage, confirm current pricing and stock, and quote for supply with collection or delivery options.