CS-1500 Rapid-Cure, Elastomeric Sealant

CS-1500 is an ASTM C920 elastomeric sealant designed for use on original construction and repairs that are subject to structural movement: expansion and control joints, perimeter caulk joints, entry way steps, precast concrete panel joints, copings, rises and tilt-wall joints, bunker silos, septic tanks and manure pits.


  • Finish: Gray, Mildew Resistant, Elastomeric Rubber
  • Solvent & Isocyanate Free, 100% Solids, Will Not Shrink
  • California Proposition 65 compliant
  • Meets ASTM C920, Type S, Grade NS, Class 50, Uses NT, M, G, A, and O.
  • Tack free skin forms in 40 minutes (77°F at 50% Relative Humidity)
  • Full cure takes place in 24 to 48 hours for ¼” beads and smaller.
  • Excellent weatherability when exposed to: Ultraviolet Radiation, Rain, Infrared Radiation, and Atmospheric Hydrocarbons.
  • CS-1500 can be painted with emulsion or synthetic enamel paints.
  • Flexible resilient rubber that adheres to most construction materials, including: Concrete, Metal, Fiberglass, Plastic, PVC, Glass, Aluminum and Wood.


CS-1500 Value
Test Method
Cure System Hybrid, Moisture Cure
VOC Content 75.5 grams/liter
Cure Rate

(77°F at 50% Relative Humidity)

1/8” every 24 hours
Gun Grade Zero Slump ASTM C639


CS-1500 Value
Test Method
Movement Capability ±50% ASTM C719
Tensile Strength 260 psi ASTM D412
Shear Strength 215 psi ASTM D1002
Elongation 695% ASTM D412
Adhesion to Concrete 23 pli, cohesive failure ASTM D794
Shore A, Hardness 32 ASTM D661
UV Stability,Accelerated Weathering UV-A, No Change (2,000 hours) QUV Weatherometer
Shrinkage No measurable shrinkage after 14 days
Service Temperature -40°F to 220°F (-40°C to 104°C), continuous service
Application Ambient Temperature 40°F to 130°F (4°C to 55°C)
Application Surface Temperature 40°F to 130°F (4°C to 55°C)

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Surface Preparation: The concrete must be clean and free from dust, dirt, grease and debris before applicatio of CS-1500.  Inspect surface for soundness.  When surface is clean, sound and dry proceed with using the CS-1500.
Note:  Make sure the surface is free from frost prior to application.
DO NOT USE petroleum solvents such as Mineral Spirits or Xylene for surface preparation.
Priming: For applications with continuous water immersion ConSeal recommends using a surface primer.  ConSeal CS-80 is specifically designed for ConSeal’s elastomeric sealants.
Application Instructions: Maintain CS-1500 at room temperature before applying to ensure easy application.  CS-1500 may be factory or field applied to seal various construction components.  Work CS-1500 into rough surfaces to optimize surface contact.  CS-1500 is not to be installed in ratios where joint depth is greater than half of the width.  CS-1500 is not designed to bridge gaps larger than 1” or penetrate into joint depth further than ½”.  The use of a backer rod may be necessary in some applications.  If using to fill cracks, avoid air entrapment by filling void with continuous bead of CS-1500.
Packaging and Storage: Available in 10.1-fl. oz. cartridges (298 mL), 20.2-fl. oz. sausages (600mL), 28.5-fl. oz. cartridges (842mL) and 5-gallon pails.
12-month shelf life from manufacture date when stored in a cool, dry area. Elevated temperatures >100° F may reduce shelf life.
Coverage and Full Cure Rates: 10.1-ounce cartridges: ½” diameter bead covers 7.5 linear feet.
Full cure for ¼” bead is 48 hours (77°F at 50% Relative Humidity).