• No Mixing Required: One-component, gun-grade formula simplifies use
• ±35% Joint Movement: Excellent elasticity for dynamic joints
• Non-Sag: Ideal for vertical and overhead applications
• Acoustic Rated: Improves sound transmission class (STC 44, ASTM E90)
• Water Immersion Safe: Approved for wet areas with proper primer
• Interior & Exterior Use: Functions in above- and below-grade conditions
• Wide Temp Range: Applies from -40°F to 180°F
• Adheres to Many Substrates: Concrete, aluminum, masonry, wood, natural stone, tile
• Paintable: Compatible with non-rigid coatings
• Fire Resistant: UL classified; passes 4-hour fire and hose stream test
• VOC Compliant in All 50 States: Meets strict regulatory requirements

Sikaflex® NP 1 is suitable for both horizontal and vertical joints in demanding environments:

• Expansion joints
• Control joints
• Precast concrete panels
• Roofing components and flashing
• Storefronts and window/door frames
• Stucco, masonry, siding joints
• Fascia and parapets
• Wet environments (with appropriate primer)

Common Substrates:

• Concrete (including green concrete after 72 hrs)
• Masonry (stone, brick, block)
• Wood (weathered or treated)
• Aluminum
• Clay & concrete roof tiles
• Natural stone
• Vinyl and stucco siding
• Metal surfaces (with primer)

Surface Preparation

• Ensure surfaces are structurally sound, clean, and dry
• Remove oil, grease, old sealant, and curing compounds
• For porous substrates, abrasive prep (e.g., grinding or brushing) is recommended
• Primer required for immersion, green concrete, metals, or questionable adhesion situations (Sikaflex® Primer-173)

Joint Design

• Recommended joint depth: ¼"–½"
• Use backer rod or bond breaker to control depth and prevent 3-point adhesion
• Follow SWRI guidelines for proper joint geometry

Application

• Use standard professional-grade caulking gun
• Fill joints from bottom up to avoid air pockets
• Tool immediately for best adhesion and clean finish
• For roofing tiles, apply sealant bead to the upper surface of the downslope tile and press upslope tile into place

Cure Time

• Skins within 24 hrs.
• Full cure ~7 days (longer in cold/humid conditions)
• Allow 21 days for immersion use
• Paintable after full cure (adhesion test recommended)

Cleanup

• Clean uncured sealant with xylene
• Remove cured material mechanically