Nexoseal Mono - Airtight Sealing Tape

Partel NEXOSeal Mono™ is a high performance, breathable adhesive tape engineered for airtight and weatherproof detailing in modern construction. It provides a robust, monolithic seal for membrane overlaps, joints, penetrations, and window or door connections, ensuring long-term airtightness and enhanced building performance.

Why Partel NEXOSeal Mono™?

• Advanced monolithic structure wicks moisture for a durable, long-lasting seal

• Strong adhesion to membranes, wood, metal, and plastics

• Maintains airtightness and weatherproofing at critical junctions

• Flexible and conformable to irregular surfaces

• Long-term durability with UV stability

• Non-toxic and solvent-free

Application

NEXOSeal Mono™ is ideal for creating permanent airtight and windtight connections at:

• Membrane overlaps, laps, and joints

• Windows, doors, and penetrations

• Timber frame, steel frame, and modular construction

• New build and retrofit projects requiring robust adhesive solutions

Suitable for:

• Internal and external use

• All Partel membranes, including EXOPERM range

• Timber panels: OSB, MDF, plywood

• Concrete, masonry, PVC, and metal

Dimensions

• 60MM × 25M | 2” 3/8 × 82’ 0 1/4”

• 100MM × 25M | 3” 15/16 × 82’ 0 1/4”

• 150MM × 25M | 5” 7/8 × 82’ 0 1/4”

• 200MM × 25M | 7” 7/8 × 82’ 0 1/4”

• 250MM × 25M | 9” 13/16 × 82’ 0 1/4”

• 300MM × 25M | 11” 13/16 × 82’ 0 1/4”
  

Key Technical Data

• Structure: Breathable polyolefin with adhesive coating

• SD Value: 0.26 m (EN ISO 12572)

• G Value: 1.3 MNs/g (EN 1928)

• Vapour Permeance: 13 US perms (ASTM E 96)

• Tensile Strength MD/CD: 270/210 N / 50 mm (EN 13859-1)

• Reaction to Fire: B-s1, d0 (EN 13501-1)

• Resistance to Water Penetration: W1 (EN 1928)

• Nail Tear Strength MD/CD: 200/220 N (EN 13859-1)

• Temperature Resistance: -40°C to +80°C (EN 13859-2 / EN 1109)

• UV Stability: 4 months roof, 6 months wall (EN 13859-2)

• Weight: 250 g/m² (EN 1849-2)

• Airtightness: 0.01 m³/(h·m²) pHA

Packaging & Storage

• Store flat in original packaging in cool, dry conditions (5°C – 25°C)

• Protect from prolonged UV exposure prior to installation

Safety & Handling

• Non-toxic and Low VOC

• Recyclable backing where possible

• Dispose according to local regulations

• Keep out of reach of children

Documents

[NEXOSeal Mono™ Technical Data Sheet]