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SIGA Majrex 200 – 59" × 164' (807 sq. ft.)
Description
SIGA Majrex 200 is a high-performance smart vapour control and airtight membrane designed for installation on the interior, warm side of insulated wall, roof and ceiling assemblies.
Majrex uses SIGA's unique Hygrobrid® technology, providing moisture-variable vapour control that responds to changing conditions within the building assembly. This helps manage moisture while supporting drying potential and reducing the risk of moisture accumulation within insulated construction.
Designed for durable, energy-efficient buildings, Majrex creates a continuous interior airtight layer while providing intelligent vapour control. Its dimensionally stable construction allows fast, wrinkle-free installation, while printed cutting and installation guides simplify layout on site.
Features
- Smart moisture-variable vapour control membrane
- SIGA Hygrobrid® technology
- Provides interior airtightness and vapour control
- Supports drying potential within building assemblies
- Helps reduce the risk of moisture accumulation
- Designed for the warm side of thermal insulation
- Suitable for walls, roofs and ceilings
- Ideal for high-performance and energy-efficient construction
- Dimensionally stable construction
- Fast, wrinkle-free installation
- Printed cutting and installation guides
- Reinforced for durability
- 12 mil / 0.3 mm thickness
- Temperature resistance: -40°C to +80°C (-40°F to +176°F)
- W1 resistance to water penetration
- Class A flame spread and smoke developed ratings
- Designed to integrate with SIGA airtight sealing tapes and accessories
- Available Size
1.5 m × 50 m (59" × 164') — approximately 807 sq. ft. per roll
Specifications
Specifications
Brand
Size
- 59" x 164' (1.5 m x 50 m)
Area-Related Mass
- 0.49 oz./ft²
- 148 g/m²
Thickness
- 12 mil / 0.3 mm
Temperature Resistance
- -40° to 176° F (-40° to 80° C)
Tensile Strength
- 34.9 lb/in / 6.1 N/mm
- 27.2 lb/in / 4.8 N/mm
Maximum Tensile Strength
- 270 (310) N/50 mm
- 210 (260) N/50 mm
Direction 1 Water Vapor Variability
- 0.17 (9.2) to 3.8 (217.4) US Perms (Ng/Pa.m². s)
Direction 2 Water Vapor Variability
- 0.16 (9.2) to 1.3 (74.4) US Perms (Ng/Pa.m². s)
Dynamic Diffusion-Equivalent Air Layer Thickness
- < 0.097 to ≥ 4.25 US perms
Smoke Developed Index (Rating)
- 55 (Class A)
Flame Spread Index (Rating)
- 0 (Class A)
Resistance to Water Penetratio
- W1
Applications
Applications
Documentation
Documentation
Data Sheets
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