Bostik Chem-Calk 916

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Description for Bostik Chem-Calk 916

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

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Application Type	Seal
1 Part or 2 Part	1-Part
Material Form	Paste
Substrate	Ceramic, Steel, Wood, Porous
Industry	Perimeters of windows, Perimeters of doors
Manufacturer	Bostik
Chemistry	Polyurethane
Cure Method	Moisture
Viscosity (cPs)	Non-Sag, Slump
Color	Black, Tan, Limestone, Limestone, White, Bronze, Brown: Almond, Gray: Aluminum Stone, Buff, Buff, Medium Bronze, Medium Bronze, Milgard Tan
High Temperature Resistance (°C)	66
Low Temperature Resistance (°C)	-29
Durability	Tough

Best Practices for Bostik Chem-Calk 916

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Technical Data for Bostik Chem-Calk 916

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Overview

Application Type
- Sealant - Seal
1 Part or 2 Part
- 1-Part
Material Form
- Paste
Substrate
- Ceramic
- Porous Substrates - Porous
- Steel
- Wood
- Other - Marble
Industry
- Industrial - Control joints, Sealing expansion
- Construction - Masonry
- Construction Window - Perimeters of windows
- Construction Door - Perimeters of doors
Chemistry
- Polyurethane
Application Method
- Dispenser - Gun
Cure Method
- Moisture / Condensation Cure - Moisture
Color
- Black
- Brown - Buff, Medium Bronze, Milgard Tan, Tan
- Brown : Almond
- Gray - Limestone
- Gray : Aluminum - Aluminum Stone
- Off-White - Limestone
- White
- Yellow - Bronze, Buff, Medium Bronze

Specifications

Cure Specs

Viscosity (cPs)	Non-Sag, Slump

Bond Strength

Peel Strength (piw)	>5	Test Method
Tensile Strength (psi)	135	Test Method

Material Resistance

UV Resistance	Pass	Test Method
High Temperature Resistance (°C)	66
Low Temperature Resistance (°C)	-29

Hardness

Durability	Tough
Shore A Hardness	38	Test Method
Elongation (%)	564	Test Method
Flexibility	Flexible, Elastomeric
Modulus (psi)	45, 59	Test Method

Business Information

Shelf Life Details	Shelf life of Bostik® Chem-Calk® 916 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 Chem-Calk 916

*See Terms of Use Below
1. 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.
2. Curing
  
  Bostik® Chem-Calk® 916 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 one hour 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.
3. 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).
Comparable Materials for Bostik Chem-Calk 916

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