Masterseal NP1 Caulk: Polyurethane 10.1oz Tube


  • One-component, elastomeric, gun-grade polyurethane sealant
  • Ready to apply; no mixing required
  • No primer required for application to most substrates
  • Weather resistant; provides long lasting weather tight seals
  • Wide temperature application range; suitable for all climate conditions
  • Paintable
  • Suitable for water immersion *
  • Shelf life: 12 months
  • Case quantity: 30
  • 5 year manufacturer’s limited warranty
  • Sonneborn Systems construction product
  • Formerly Sonolastic NP1 Caulk
  • 11 Standard Colors

Technical Data Sheet

Safety Data Sheet

Color Chart

Sealant Coverage Chart

Sealant Quantity Calculator