Bostik CC-900

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Description for Bostik CC-900

One-component, architectural grade sealant capable of dynamic joint movement; properties remain stable in severe weather and temperature changes.

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Application Type	Bond, Repair, Seal
1 Part or 2 Part	1-Part
Material Form	Paste
Substrate	Ceramics, Metals, Plastics, Steel, Wood
Industry	Window framing, Door framing
Manufacturer	Bostik
Chemistry	Polyurethane
Cure Method	Moisture
Cure Temperature (°C)	25
Cure Time (min)	4,320 to 10,080
Viscosity (cPs)	Non-Sag, Slump
Color	Black, Tan, Limestone, Limestone, Antique White, Medium Bronze, Stone, White, Bronze
High Temperature Resistance (°C)	66
Low Temperature Resistance (°C)	-40
Durability	Tough

Best Practices for Bostik CC-900

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Technical Data for Bostik CC-900

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Overview

Application Type
- Adhesive - Bond
- Repair & Maintenance - Repair
- Sealant - Seal
1 Part or 2 Part
- 1-Part
Material Form
- Paste
Substrate
- Ceramic - Ceramics
- Metal - Metals
- Steel
- Plastic - Plastics
- Wood
- Other - Marble
Industry
- Industrial - Concrete panels, Metal Curtain Walls
- Construction - Building components, Masonry
- Construction Window - Window framing
- Construction Door - Door framing
Chemistry
- Polyurethane
Application Method
- Dispenser - Gun
Cure Method
- Moisture / Condensation Cure - Moisture
Color
- Metallic - Medium Bronze, Bronze
- Black
- Brown - Tan
- Gray - Limestone, Stone
- Off-White - Limestone
- White - Antique White

Specifications

Cure Specs

Cure Temperature (°C)	25	Test Method
Cure Time (min)	4,320 to 10,080	Test Method
Viscosity (cPs)	Non-Sag, Slump
Tack Free Time (min)	360	Test Method
Work / Pot Time (min)	70	Test Method

Bond Strength

Peel Strength (piw)	>35	Test Method
Tensile Strength (psi)	180	Test Method

Material Resistance

UV Resistance	Pass	Test Method
High Temperature Resistance (°C)	66
Low Temperature Resistance (°C)	-40

Hardness

Durability	Tough
Shore A Hardness	38	Test Method
Elongation (%)	950	Test Method
Flexibility	Flexible, Elastomeric
Modulus (psi)	70	Test Method

Business Information

Shelf Life Details	Shelf life of Chem-Calk 900 must be checked prior to using the product; do not use past its shelf life. Caulk past its shelf life may not perform or adhere as described by this data sheet. High temperature and high relative humidity may reduce significantly the shelf life of polyurethane sealants.

Best Practices for Bostik CC-900

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1. Design
  
  In general, more joint movement can be accommodated in a thin bead of sealant than a thick bead. Chem-Calk® 900 polyurethane sealant should be no thicker than 1/2" (12.7mm) and no thinner than 1/4" (6.4mm). In joints between 1/2" and 1", the ratio of sealant width to depth should be approximately 2:1. Sealant depth in joints between 1/4” and 1/2" should be 1/4" deep. Joints with dynamic movement should not be designed in widths less than 1/4".
2. Surface Preparation
  
  See limitations about surface preparation. Surfaces must be structurally clean, dry (no frost) and structurally sound, free of contaminants, including but not limited to dust, dirt, loose particles, tar, asphalt, rust, mill oil, etc. If substrate is painted or coated, scrape away all loose and weakly bonded paint or coating. Any paint or coating that cannot be removed must be tested to verify adhesion of the sealant or to determine the appropriate surface preparation if needed. (See ASP section on next page for details.) To remove laitance and any other loose material, clean concrete, stone or other masonry materials with nonalcoholic-based solvent by washing, grinding, sandblasting or wire brushing as necessary . Do not use water to clean substrates. Dust must be thoroughly removed after cleaning.
3. Curing
  
  Chem-Calk 900 is a moisture cure, polyurethane sealant. On wood, with ambient air at 50% relative humidity and at 73°F, polyurethane sealants will generally skin within four hours and cure 1/16 of an inch per day. Lower temperature and lower relative humidity will significantly increase the skin time and cure time of a polyurethane sealant.
4. Clean-Up
  
  After dry-wiping uncured sealant from substrates and tools, remaining uncured sealant can be removed by using Xylene, Toluene or similar aromatic solvents. Please refer to the MSDSs provided for these solvents before use. Bostik® Hand and Tool towels can also remove uncured sealant. Cured sealant is usually very difficult to remove without altering or damaging the surface to which the sealant has been misapplied. Cured sealant can be removed by abrasion or other mechanical means (scrapers, putty knives).
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