Sikasil -N Plus US

Neutral Cure Silicone Assembly Sealant

Sikasil ® -N Plus US is a general purpose, one-component, non-sag, elastomeric, 100% RTV neutral cure silicone sealant. Meets the requirements of ASTM C-920, Type S, Grade NS, Class 25, Use NT, T, M, G, A, O; TT-S-00230C, Type II, Class A; TT-S-001543A, Class A; CAN/CGSB- 19.13-M87, AAMA 802.3 Type II, AAMA 803.3, AAMA 805.2, AAMA 808.3 and California Air Resources Board 2003 requirements for Volatile Organic Compound content.

Where to use

  • Extremely long service life
  • Excellent flexibility for dynamic joint movement
  • Bonds to most substrates without priming
  • Ready to use, no mixing required
  • AAMA Certified component for window backbedding / glazing
  • All season ease of application
  • Fungicide additive for mildew resistance


  • Window and door fabrication
  • Conventional glazing
  • Back bedding and cap, toe and heel beads
  • Perimeter sealing of windows, doors and skylights
  • Expansion and control joints
  • HVAC, White goods assembly
  • Kitchen and bath countertops/solid surfaces, Sanitary Seals
  • Marine cabins
  • Truck/trailer/auto/RV



In all cases, make sure the joint design is correct. Proper joint design minimizes stresses on the sealant. Use masking tape if desired for areas adjacent to the joint to be sealed to prevent surface contamination. Apply sealant to dry, clean surfaces. An air operated or hand operated cartridge gun may be used. Do not break cartridge seal until just before use. Surfaces should be dried before the sealant is applied. Normally sealant skins in 8 minutes, dries to touch in 1 hour, and bonds in 24 hours. This product is suitable for bulk dispensing straight from drums or pails by means of a pneumatic or hydraulic pump system. For recommendations on selecting and setting up a suitable pump system please contact our Technical Service Department.


Cartridge: Approximately 12.2 linear ft. (3.7 lin. m) for 1/2 x 1/4 in (13 x 6 mm) bead.