Childers® Chil-Byl® CP-76 Sealant
1 of 4 products in this brandChilders® Chil-Byl® CP-76 Sealant is a well-balanced mixture of butyl polymers tailored for long-lasting flexibility in various insulation applications, including low-temperature, dual-temperature, and high-temperature settings. It is an excellent water seal, vapor seal, and expansion joint material and is suggested as a joint sealant for metal jacketing systems.
RTU Product Type: Solventborne Sealant
Application Area: Joints
Compatible Substrates & Surfaces: Glass, Plastics
Application Method: Extrusion, Gun, Knife-over-roll, Trowel
Features: Excellent Seal Properties, Excellent Water Soak Resistance, Good Adhesion, Good Flexibility, Good Thermal Stability, Low Shrinkage, Vibration Resistance
Enhanced TDS
Identification
- GBU
- RTU Product Type
- Categories
Application Information
- Product End Uses
Applications
- Application Area
- Application Method
- Compatible Substrates & Surfaces
Applications & Uses
- Preparation and Application Information
-
Use of Material
- Although Chil-Byl® CP-76 Sealant may be used at very low temperatures, it is recommended that it be kept as warm as possible (preferably stored at 70°F or 21°C) just prior to application for optimum ease of application.
Condition of the Surface to Be Coated
- The surface to be coated shall be as clean and dry as possible.
- No primer is required over metal surfaces, however Chil-Byl® CP-76 Sealant should not be applied over dusty, wet, damp or icy surfaces, as adhesion may be adversely affected.
Application
- Chil-Byl® CP-76 Sealant is usually applied with a steel trowel.
- There is power extrusion equipment available for production applications.
- When using the caulking tubes and laying down a bead in the joints of block insulation or pipe insulation, sufficient material should be applied so that when the joints are squeezed together a minimum of 1/16” film is formed.
- When the joints of insulation are squeezed together, any excess of Chil-Byl® CP-76 Sealant should be removed or smoothed down flush with the insulation surface.
- Spillage or overflow of Chil-Byl® CP-76 Sealant may be readily removed with almost any type of hydrocarbon solvent (caution must be exercised to ensure that the solvent used will not attack the underlying insulation and/or substrate).
- Although Chil-Byl® CP-76 Sealant may be coated over with most types of coatings, user should verify by his own tests that there will be no bleeding through the top coating by the Chil-Byl® CP-76 Sealant.
- Suggested Specifications
-
Joint Sealant for Cellular Glass or Cellular Plastic Insulations (Except Polystyrene)
- During application of insulation, apply a 1/8” (0.31 cm) thickness of CHIL-BYL® CP-76 sealant to the longitudinal and abutting joints.
- Sections of insulation shall be pressed firmly into place to ensure an unbroken seal. A 1” minimum depth of sealant is recommended.
- At termination of insulation, the Chil-Byl® CP-76 Sealant shall be extended back under the insulation for a minimum of 4” (10.16 cm).
Joint Sealant for Metal Jacketing Systems
- All joints of aluminum or stainless steel jacketing shall be weather sealed by applying a 1/8” (0.31 cm) bead of Chil-Byl® CP-76 Sealant underneath the lap.
- Jacketing shall be firmly embedded and pulled up tight.
- All overflow of sealant shall be removed with solvents.
- Flashing
- Chil-Byl® CP-76 Sealant shall be applied over the adjoining surfaces a minimum of 2” (5.08 cm) and flashed a minimum of 2” (5.08 cm) in each direction.
- A membrane of CHIL-GLAS® #10 shall be embedded into the flashing compound and the minimum dry flashing thickness at all points shall be 1/8” (3 mm).
Notes to Specifying Engineer
- When using a solvent-based, vapor barrier coating system such as ENCACEL® or CHIL-PERM® CP-30LO, the joint sealant to be used shall be CHIL-BYL® CP-76.
- CHIL-JOINT® CP-70 shall not be used for this application.
- Pressurized piping made from copper and aluminum alloys may be susceptible to under insulation corrosion when moisture is present and in direct contact with many materials.
- When used as a joint sealant, direct contact between pressurized pipes made from these metals and the sealant should be prevented.
Features
- Ready-to-Use Product Features
Features & Benefits
- Product Highlights
-
- Chil-Byl® CP-76 Sealant is used to vapor seal the joints of cellular glass and cellular plastic insulations (except polystyrene).
- It remains flexible and functional through a wide temperature range.
- Chil-Byl® CP-76 Sealant has good resistance to elevated temperatures, and is recommended as an expansion joint material up to 300°F.
- It is an excellent water seal, vapor seal and expansion joint material and is suggested as a joint sealant for metal jacketing systems.
- Chil-Byl® CP-76 Sealant is applied with pointed trowel, putty knife or power extrusion equipment.
- It is also available in caulking tubes and may be applied with hand or power caulking guns.
- It has a heavy body and can be applied in various thicknesses without sagging or running.
- Chil-Byl® CP-76 Sealant resists the effects of water soak, high temperatures, vibration stresses and combinations of all three.
- It has extremely low shrinkage, excellent adhesion and requires no mixing or additives.
Packaging & Availability
- Regional Availability
Physical Properties
- Physical Form
Properties
- Application Temperature:
-
4~38 °C
- Flash Point:
-
39 °C
- Shelf Life:
-
12 months
- Note
-
¹ - FOR JOINT: 1” x 1/16” = 308 linear ft. per U.S. Gal. (2.5 cm x 0.15 cm = 24 m/liter) , 1/8” bead = 125 lineal ft. per 10.5 fl. oz. tube (3.2 mm bead = 38 m per 0.31 I tube)
² - Surface: Inorganic reinforced cement board, Total Coverage: 32 sq. ft./gal., 2” wide strip
- Application Properties
-
Value Units Test Method / Conditions Application Temperature Range 4 - 38 °C - Service Temperature Range -73 to 149 °C - - Typical Properties
-
Value Units Test Method / Conditions Average Non-Volatile Content 67 Vol(%) ASTM D2369 Average Non-Volatile Content 77 Wt(%) ASTM D2369 Coverage Range¹ 3.1 gal./100 sq. ft - Drying Time (set to touch) 8 hours - Drying Time (through dry) 24 - 72 hours - Flash Point 39 °C - Water Vapor Permeance (at 100°F, 1.3 mm, 90% RH, dry film) 0.038 perms ASTM F1249 Wet Weight 10.4 lbs/U.S. gal. ASTM D1475 - Flame Characteristics
-
Value Units Test Method / Conditions Smoke Developed² 5 - ASTM E84 Surface Flame Spread² 5 - ASTM E84 Volatile Organic Compound Content 356 g/L -
Regulatory & Compliance
- Certifications & Compliance
- Chemical Inventories
- Quality Standards
- Certifications
-
Certified
- Meets NFPA Standard 90A and 90B 25/50 requirements.
- This product has been tested according to ASTM E84 (Surface Burning Characteristics of Building Materials).
- Meets requirements for LEED IEQ 4.1 Low-Emitting Materials, Adhesives and Sealants when used as a butt joint sealant in insulated systems.
Storage & Handling
- Shelf Life
-
12 months