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Sika SikasilĀ® 728 RCS Two-part, self-leveling, rapid cure, ultra low modulus, horizontal application, neutral cure silicone sealant
Categories: Polymer; Adhesive; Thermoset; Silicone; Silicone, RTV, Adhesive/Sealant Grade

Material Notes: Sikasil-728 RCS (Rapid Cure System) is a self-leveling, two-component, very rapid cure, ultra low modulus elastomeric, neutral cure silicone sealant. Exceeds the requirements of ASTM C-920, Type M, Grade P, Class 100/50, Use T, M, G, A, O; TT-S-00227E, Type I, and various AASHTO reports and state DOT approvals.

Where to Use: Construction Application:

  • Horizontal expansion joints
  • Highway and bridge joints
  • Saw cut joints - new and remedial
  • Plaza decks
  • Parking decks
  • Bridges
  • Airports
  • Stadiums
  • Driveways
  • Horizontal
  • Interior and exterior
  • Above grade or on grade
  • Concrete, steel, glass, aluminum, tile, ceramic, masonry, brick, stone and granite
  • No tooling, less labor
  • Excellent flexibility for extreme high and low temperature conditions
  • Excellent flexibility for dynamic joint movement
  • Bonds to most substrates without priming
  • Open to traffic in one hour
  • All season ease of application
  • Good contact/adhesion with hard to reach areas
  • Ideal for cold climates
  • Excellent for use on runways and tarmacs
  • Jet fuel resistant
  • Resistant to road salts

Information provided by Sika Corporation.

Available Properties
  • Volatile Organic Compounds (VOC) Content, 2.4% by wt
  • Hardness, Shore A, ASTM C-661 & ASTM D-2240
  • Hardness, Shore OO, ASTM C-661 & ASTM D-2240
  • Tensile Strength, ASTM D412
  • Tensile Stress at Strain, ASTM D412
  • Elongation at Break, ASTM D412
  • Elongation at Break, ASTM D-5329, Joint (a) (b)
  • Tensile Modulus, ASTM D-5329, Joint (a) (b)
  • Peel Strength, ASTM C794, on aluminum, glass and concrete
  • Maximum Service Temperature, Air
  • Minimum Service Temperature, Air
  • Cure Time, Skin-over Time
  • Cure Time, 19%
  • Tack-Free Time
  • Shelf Life, in original unopened cartridge
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