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SEALANTS

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SPEC

D ATA

SHEET

SEALANTS

M66 MODIFIED POLYURETHANE CONSTRUCTION SEALANT

PRODUCT NAME

CRL M66 Modified Polyurethane One Component Elastomeric Construction Sealant with a Grainy Texture Appearance.

PRODUCT DESCRIPTION

CRL M66 is a one-part, medium modulus, moisture curing sealant. CRL M66 offers excellent primerless adhesion on most common construction surfaces, including Kynar™ and coated metals.

CRL M66 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.

USES

CRL M66 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 M66 has been used in manufacturing uses such as production of travel trailers, motor homes, mobile homes, and modular prefab houses. Heating and air conditioning companies use CRL M66 on galvanized duct components.

This Eco-Friendly sealant contains no solvents or isocyanates, and is VOC compliant.

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 from -75°F to 300°F (-59°C to 149°C).

  • Permanently Flexible – Will not get hard with age like tradi- tional polyurethanes. Remains flexible in low temperatures.

  • Fast Cure - Skins over in 30 minutes and continues to cure at a rate of 1/8 inch (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.

LIMITATIONS

CRL M66 is not recommended for:

  • Horizontal decks, patios, driveway or terrace joints where abrasion or physical abuse is encountered.

  • Interior or exterior sealing below the waterline in marine applications.

  • Surfaces with special protective or cosmetic coatings without prior consultation of the manufacturer. Such surfaces include, but are not limited to mirrors, reflective glass, surfaces coated, polyethylene or polypropylene.

  • CRL M66 should not be applied with wet tooling techniques or by using solvents.Water or detergent/soap solutions are not recommended.

  • CRL M66 should not be applied to 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.

TECHNICAL DATA

The physical properties of CRL M66 Polyurethane are shown in Table 1.

TABLE 1 - PHYSICAL PROPERTIES

Property/Test Methods

Value

Shore A Hardness - Durometer .............................................. 35 + 5 Tensile Strength,ASTM D-412-68 ......................................... 380 psi Elongation (Ultimate),ASTM D-412-68 ................................... 675% Shrinkage .................................................................................... Nil

Weatherometer Atlas Xenon Arc ................................... No Change (4500 hrs)

Adhesion-in-Peel ..............................................Aluminum-25 + 3 pli Concrete-25 + 3 pli Brick-20 + 3 pli

Low Temperature Flexibility,ASTM D-746 .............................. -40°F Extrusion Rate............................35g/min. + 5, midified 1/8" orifice Service Temperature Range ................... -75° - 300°F (-59° - 149°C) Movement Capability ............................................................ + 25%

C.R. LAURENCE CO., INC. • CORPORATE HEADQUARTERS: POST OFFICE BOX 58923, LOS ANGELES, CA 90058-0923

TOLL FREE TELEPHONE (800) 421-6144 • TOLL FREE FAX (800) 262-3299 crlaurence.com

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SEALANTS

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