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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.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, Buff, Brown: Almond, Gray: Aluminum Stone, Bronze, Buff, Medium Bronze, Milgard Tan High Temperature Resistance (°C) 66 Low Temperature Resistance (°C) -29 Durability Tough -
Technical Data for Bostik Chem-Calk 916
Overview
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Application Type
- Sealant - Seal
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1 Part or 2 Part
- 1-Part
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Material Form
- Paste
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Industry
- Industrial - Control joints, Sealing expansion
- Construction - Masonry
- Construction Window - Perimeters of windows
- Construction Door - Perimeters of doors
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Chemistry
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Application Method
- Dispenser - Gun
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Cure Method
- Moisture / Condensation Cure - Moisture
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Color
- Metallic - Bronze, Medium Bronze
- Black
- Brown - Buff, Milgard Tan, Tan
- Brown : Almond
- Gray - Limestone
- Gray : Aluminum - Aluminum Stone
- Off-White - Limestone
- White
- Yellow - Buff
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. -
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Best Practices for Bostik Chem-Calk 916
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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.
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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.
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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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Tack Free Time Test Methods
Tack Free Time | Test Method |
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Work / Pot Time Test Methods
Work / Pot Time | Test Method |
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Peel Strength Test Methods
Peel Strength | Cure Time | Cure Temperature | Cure Humidity | Test Method |
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>5 piw | >20,160 min | 25°C | 50 % | TT-S-00230C / ASTM C 794, After 14 days cure at 77°F and 50% RH |
Tensile Strength Test Methods
Tensile Strength | Cure Time | Cure Temperature | Cure Humidity | Test Method |
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135 psi | >20,160 min | 25°C | 50 % | @ Break, ASTM D 412, After 14 days cure at 77°F and 50% RH |
UV Resistance Test Methods
UV Resistance | Test Method |
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Pass | ASTM C 793 |
Elongation Test Methods
Elongation | Test Method |
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564 % | ASTM D 412, at Break, After 14 days cure at 77°F and 50% RH |
Modulus Test Methods
Modulus | Test Method |
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45 psi | ASTM D 412, After 14 days cure at 77°F and 50% RH, Modulus @ 25% |
59 psi | ASTM D 412, After 14 days cure at 77°F and 50% RH, Modulus @ 100% |
Shore A Hardness Test Methods
Shore A Hardness | Shore Hardness Test Method | Hardness Temperature |
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38 | ASTM D 2240, After 14 days cure at 77°F and 50% RH | 25°C |