CRL M64BL Black Smooth Polyurethane Sealant - Cartridge

CRL M64BL Black Smooth Polyurethane Sealant - Cartridge

C.R. Laurence M64BL Black Smooth Polyurethane Construction Sealant - Cartridge is a robust, one-part, moisture-curing sealant designed for exceptional performance in a variety of construction applications. With its primerless adhesion on most common surfaces, including KYNAR® coated metals, the M64BL ensures a watertight seal in moving joints of concrete, masonry, and metal. This AAMA-approved sealant stands out for its low VOC content, compliant with only 9 g/L, making it an eco-friendly choice suitable for LEED credit. The flexible formula remains durable under extreme temperature fluctuations, operational between -75°F and 300°F (-59°C to 149°C), and offers UV resistance to prevent yellowing over time. With a fast cure time, it skins over in just 30 minutes and can be painted with water-based paints within two hours. Ideal for both interior and exterior use, the M64BL is perfect for storefronts, curtain walls, and even manufacturing applications like mobile homes and air conditioning ductwork. Notably, this sealant is USDA approved for use in meat and poultry areas, ensuring versatility in various environments. Trust C.R. Laurence M64BL for your construction sealing needs and experience the perfect blend of performance, flexibility, and eco-friendliness.

Black Smooth Polyurethane Construction Sealant - Cartridge

• One-Part Smooth Finish Formula with Primerless Adhesion on Most Common Construction Surfaces Including KYNAR® Coated Metals
• AAMA Approved
• VOC Compliant - Only 9 g/L
• UV Resistant/Non-Yellowing

CRL M64 is a one-part, moisture curing, gun grade modified polyurethane sealant. It does not require a primer on most common construction surfaces. CRL M64 is durable, flexible, and offers excellent performance in moving joints.


Basic Uses
CRL M64 Modified Polyurethane Construction Sealant is specially formulated to outperform traditional VOC solvent polyurethanes for sealing moving joints in concrete, masonry, metal, and other basic perimeter joint applications. It is ideal for all joints between framing (door and window) and the building structure in both storefront and curtain wall applications to secure a watertight installation. This advanced polymer formula offers excellent adhesion to fluoropolymer paint coatings for metal surfaces including KYNAR®, Duranar®, and Duranar® Sunstorm™ Coatings, as well as standard metal, aluminum, steel, galvanized steel, plastics, vinyl, glass, wood, concrete, brass, and other common building substrates.

CRL M64 is compatible with insulating glass sealants when glazing units and applied as a toe or heel bead. CRL M64 is designed for exterior and interior use. Withstands temperatures after full cure from -75°F to 300°F (-59 to 149°C). Paintable after only two hours with water-based paints.

It is also suitable for varied manufacturing uses, such as the production of travel trailers and mobile homes, and in the assembly of galvanized air conditioning ductwork.

FEATURES
Exceptional adhesion to KYNAR® coated metals.
VOC Compliant – only 9 g/L (Chemically curing < 3%).
Eco-Friendly Product – Solvent-Free, Isocyanate-Free, VOC Compliant, Qualifies for LEED Credit for Section EQ (Indoor Environmental Air Quality).

Low temperature gunning and application above 0°F (18°C).
Service temperature of -75°F to 300°F (-59°C to 149°C).
Permanently Flexible – Will not get hard with age like traditional polyurethanes. Remains flexible in low temperatures.

Fast Cure - Skins over in 30 minutes and continues to cure at a rate of 1/8" (3 mm) depth per day.

Tooling time – approximately 20-40 minutes, depending on temperature and humidity.

Paintable – Can be painted in only two hours with water-based paints.

UV Resistant – Will not turn yellow from exposure to the sun.

Technical Data
CRL M64 conforms to and passes:
Federal Specification TT-S-00230C, Type II, Class A.
ASTM C920-98, Type S, Grade NS, Class 25, Use NT, M, T, A, G, and O.

ASTM C510, ASTM C639, ASTM C661, ASTM C679, ASTM C717, ASTM C719, ASTM C793, ASTM C794, ASTM C1183, ASTM C1193, ASTM C1246, ASTM D412, ASTM D624, and ASTM G155.
CAN/CGSB-19, 13-M87, Type MCG-2-25-A-N, QPL # 81026.
AAMA 808.3-92 Exterior Perimeter, AAMA 802.3-92 Type II Ductile Back Bedding Compound.

USDA approved for use in meat and poultry areas.
Meets California Air Resources Board 2003 requirements for Volatile Organic Compound (VOC) content. Qualifies for LEED® (Leadership in Energy and Environmental Design) Green Building Rating System™ credit.

Limitations
Do not apply over damp or contaminated surfaces. Use with adequate ventilation. Not recommended for surfaces with special protective or cosmetic coatings without prior consultation of the manufacturer. Should not be applied to mirrors or unpredictable absorptive surfaces such as marble, limestone or granite unless a standard of appearance has been agreed on as a result of testing for stain and/or discoloration. Check cartridge label, MSDS, and Specification Data Sheet for additional limitations.

Comparable Sealants
CRL: M66 Modified Polyurethane Sealant, M65W PermaWhite. Tremco®: Vulkem® 116, Vulkem 921, DyMonic®, Dymonic® FC, TremGlaze U1400, TremPro 626. Sika®: 1A, 15LM. Sonneborn®: NP1. Pecora®: Dynatrol 1. OSI®: PR-255. Schnee Moorehead: 7100 Sealant. Bostik: Chem-Caulk 900.


Product Warning:

Do not apply over damp or contaminated surfaces. Use with adequate ventilation. Not recommended for surfaces with special protective or cosmetic coatings without prior consultation of the manufacturer. Should not be applied to mirrors or unpredictably absorptive surfaces such as marble, limestone or granite unless a standard of appearance has been agreed on as a result of testing for stain and/or discoloration. Check cartridge label and Specification Data Sheet for additional limitations.

Resources

• Available Colors avd2922-color-card.pdf
• CRL Sealant Basic Uses and Limitations
• LEED Statement
• Polyurethane Construction Sealant Safety Data Sheet
• Sealant Requirement Estimator Chart