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Description for Bostik Chem-Calk 500
Two-component, non-sag, architectural grade sealant capable of dynamic joint movement; properties remain stable in severe weather and temperature changes.Application Type Bond, Seal 1 Part or 2 Part 2-Part Material Form Paste Substrate Ceramics, Porous, Plastics, Steel, Wood Industry Door framing, Window framing Manufacturer Bostik Chemistry Polyurethane Cure Method 2 Parts Cure Temperature (°C) 25 Cure Time (min) 10,080 Viscosity (cPs) Non-Sag, Slump Color Stone, Standard colors, Uni-base Ozone Resistance Excellent Ozone resistance High Temperature Resistance (°C) 66 Low Temperature Resistance (°C) -29 Density (g/cm³) 13.4 (lbs/gal) Key Specifications ASTM (American Standard Test Method): C920: ASTM C920, Standard specification for elastomeric joint sealant, as Type M, Grade NS, Class 25, Use NT, A and M, CAN/CGSB (Canadian General Standards Board): CAN/CGSB 19.24-M90, TT (U.S. Federal Specification): S-227: TT-S-227 (Com. NBS) for two component sealants, Type II, Class A -
Technical Data for Bostik Chem-Calk 500
Overview
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1 Part or 2 Part
- 2-Part
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Material Form
- Paste
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Industry
- Industrial - Concrete panels, Metal Curtain Walls
- Construction - Building components, Masonry
- Construction Door - Door framing
- Construction Window - Window framing
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Chemistry
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Application Method
- Dispenser - Gun
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Cure Method
- 2-Part Cure - 2 Parts
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Color
- Gray - Stone
- Other - Standard colors, Uni-base
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Key Specifications
- ASTM (American Standard Test Method) : C920 : Class 25 - ASTM C920, Standard specification for elastomeric joint sealant, as Type M, Grade NS, Class 25, Use NT, A and M
- CAN/CGSB (Canadian General Standards Board) : 19.24 - CAN/CGSB 19.24-M90
- TT (U.S. Federal Specification) : S-227 : Class A - TT-S-227 (Com. NBS) for two component sealants, Type II, Class A
Specifications
Cure Specs
Cure Temperature (°C) 25 Test Method Cure Time (min) 10,080 Test Method Viscosity (cPs) Non-Sag, Slump Work / Pot Time (min) 120 Test Method Bond Strength
Tensile Strength (psi) 120 Test Method Material Resistance
Ozone Resistance Excellent Ozone resistance UV Resistance Good Test Method High Temperature Resistance (°C) 66 Low Temperature Resistance (°C) -29 Hardness
Shore A Hardness 20 Test Method Flexibility Flexible, Elastomeric Modulus (psi) 65 Test Method Other Properties
Density (g/cm³) 13.4 (lbs/gal) Test Method Business Information
Shelf Life Details Shelf life of Bostik® Chem-Calk® 500 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. Shelf Life Temperature (°F) 75 Shelf Life (mon) 12 Not Good For
Don't Use For Exterior or interior structural submerged applications. -
Best Practices for Bostik Chem-Calk 500
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Mixing
Chem-Calk® 500 is a multipart sealant provided as base, activator (or curing agent) and color pack. All the accelerator and appropriate color pack must be thoroughly mixed with the base to avoid uncured areas and/or color streaks. Failure to follow mixing instructions implicitly can result in spotty cure, random cure or complete lack of cure of the sealant. Do not attempt to mix partial units, as the exact ratio of curing agent to base is essential for optimum performance.
See Vendor Technical Data Sheet for more info.
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Clean-Up
Excess sealant should be dry-wiped from all surfaces while still uncured, and followed with a commercial solvent wipe. Contact Technical Service for solvent recommendations. Should sealant accidentally begin to cure on adjacent porous surfaces, the excess sealant should be allowed to progress through the initial cure or setup. It should be removed promptly by abrasion or other mechanical means. CURED SEALANT IS USUALLY VERY DIFFICULT TO REMOVE WITHOUT ALTERING OR DAMAGING THE SURFACE TO WHICH THE SEALANT HAS BEEN MISAPPLIED. Bostik recommends the use of Bostik® Hand & Tool Towels for easy removal of uncured Chem-Calk® 500 from surfaces, hands and tools.
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Comparable Materials for Bostik Chem-Calk 500
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Cure Temperature Test Methods
Cure Temperature | Cure Time Test Method |
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25°C | After 7 days cure at 77°F and 50% RH |
Cure Time Test Methods
Cure Time | Test Method |
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10,080 min | After 7 days cure at 77°F and 50% RH |
Work / Pot Time Test Methods
Work / Pot Time | Test Method |
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120 min | ASTM C603, modified, approximately, Relative to temperature |
Tensile Strength Test Methods
Tensile Strength | Cure Time | Cure Temperature | Cure Humidity | Test Method |
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120 psi | 10,080 min | 25°C | 50 % | ASTM D 412, After 7 days cure at 77°F and 50% RH |
UV Resistance Test Methods
UV Resistance | Test Method |
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Good | ASTM C 793 75 |
Modulus Test Methods
Modulus | Test Method |
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65 psi | ASTM D 412 |
Shore A Hardness Test Methods
Shore A Hardness | Shore Hardness Test Method | Hardness Temperature |
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20 | ASTM D 2240, After 7 days cure at 77°F and 50% RH | 25°C |
Density Test Methods
Density | Test Method |
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13.4 (lbs/gal) | ASTM D1475 |