Bostik Chem-Calk 500

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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.

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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

Best Practices for Bostik Chem-Calk 500

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Technical Data for Bostik Chem-Calk 500

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Overview

Application Type
- Adhesive - Bond
- Sealant - Seal
1 Part or 2 Part
- 2-Part
Material Form
- Paste
Substrate
- Ceramic - Ceramics
- Porous Substrates - Porous
- Steel
- Plastic - Plastics
- Wood
- Other - Marble, Masonry
Industry
- Industrial - Concrete panels, Metal Curtain Walls
- Construction - Building components
- Construction Door - Door framing
- Construction Window - Window framing
Chemistry
- Polyurethane
Application Method
- Dispenser - Gun
Cure Method
- 2-Part Cure - 2 Parts
Color
- Gray - Stone
- Other - Standard colors, Uni-base
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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1. 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.
2. 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.
Comparable Materials for Bostik Chem-Calk 500

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