Kommerling GD 677NA2-Part Polyurethane Insulating Glass SealantDescriptionKommerling GD 677NA is a 2-component polyurethane sealant. Kommerling GD 677NA demonstrates high strength and elasticity. It has excellent adhesion to clean surfaces such as glass, aluminum, galvanized and stainless steel. Primers are not required.

Basic UseKommerling GD 677NA is designed to be used as a secondary edge sealant for dual-seal insulating glass units and is widely used in the manufacture of high-end wood windows. Kommerling GD 677NA demonstrates excellent adhesion to glass surfaces and most IG spacer systems including aluminum, anodized aluminum, stainless steel, and tin plated steel. It has been formulated to work in hand-gunning as well as fully automated robotic application.

Typical application rates are a minimum 4.0mm depth for gas-filled IG units. (However, when determining sealant volume to apply, unit size, weight, and glazing system design need to be evaluated for proper IG assembly design).

SafetyPrior to working with this or any product consult product label and Material Safety Data Sheet (MSDS) for necessary health and safety precautions.

Limitations• High- viscosity Kommerling GD 677NA may require a Graco Hydra-Mate equipped with a King air motor. Graco Bulldog® motors may not pump a sufficient volume of Kommerling GD 677NA for high-volume production. Kommerling GD 677NA pumps very well on all European IG application equipment.

Product Information

Features BenefitsHigh strength, thermosetting sealant

Excellent structural integrity of sealed unit

Medium-low moisture vapor transmission rate (MVTR)

Greater protection against voids in primary sealant when compared to silicone secondary-sealed IG

Mercury-free catalyst Improved safety

P.O. Box 457, 4401 Page Avenue Michigan Center, MI 49254 Phone: (800) 248-4010 Fax: (517) 764-6697 www.adcocorp.com

CAUTION: All statements and technical information in this document are based on tests or data that ADCO believes is reliable. However, ADCO does not warrant or guarantee the accuracy or completeness of this information. The user has sole knowledge and control of factors that can affect the performance of ADCO’s products in the user’s intended application. It is the user’s responsibility to conduct tests to determine the compatibility of ADCO’s product with the design, structure, and materials of the user’s end product and the suitability of ADCO’s product for the user’s method of application and intended use. The user assumes all risk and liability arising out of such use.

PackagingKommerling GD 677NA is available in the following standard packages:

Part #

IG-677NAA-DRIG-677NAB-PA

Package

DrumPail

Storage and Shelf LifeStore material in original unopened packaging at temperatures between 40°F-90°F. Shelf life is 9 months when stored as recommended.

Fill Volume

50 gallon5 gallon

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Weight

702 lb46 lb

Technical DataPerformance Properties

Typical Values Test MethodDensityPart APart B

1.65 - 1.71 g/ml1.07 - 1.13 g/ml

23oC (73oF)

Pot Life 10 - 20 mins 23oC (73oF)

Shore A Hardness 33 - 43 DIN 53505; Cure time of 24 hours at 23oC, 50% RH

Peel Strength > 4.0 N/mm> 23 lb/in

Cure time of 24 hours at 23oC, 50% RH, 90o peel angle at a rate of 100mm/ minute

Tear Strength > 0.8 N/mm2

>115 lb/in2

Cure time of 7 days at 23oC, 50% RH, DIN 52455 Part 1

Physical PropertiesComposition:Part A Part B

PolyurethaneIsocyanate

Color BlackMixing Ratio - VolumePart A : Part B

10 : 1

Mixing Ratio - WeightPart A : Part B

10 : 0.65

WARRANTY: ADCO warrants its products to conform to ADCO’s specifications at the time of sale when tested according to ADCO standards. If a product is proven to be defective when tested according to ADCO standards, ADCO will, at its option, refund the purchase price or replace or repair the defective product. THIS LIMITED WARRANTY IS THE BUYERS SOLE AND EXCLUSIVE REMEDY AGAINST ADCO AND IS IN LIEU OF ANY AND ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. In no event shall ADCO be liable for any special, incidental, conse-quential, or punitive damages arising out of any claims whether based on negligence, contract, warranty, strict liability or otherwise.

XXXXX • 09/2009

P.O. Box 457, 4401 Page Avenue Michigan Center, MI 49254 Phone: (800) 248-4010 Fax: (517) 764-6697 www.adcocorp.com

NOTE:The foregoing information is published as general information only. The listed properties and performance characteristics are typical values and are not to be interpreted as manufacturing specifications.

ApplicationSubstrate Preparation: The surfaces to be bonded must be dry, clean and free from dust and grease. Glass surfaces should be thoroughly cleaned by hand or machine with non-film forming, low residue detergent and rinsed thoroughly with clean hot water.

Application: When using automatic mixers observe the cor-rect setting of the dosing cylinder. The mixing ratio is 10: 1 by volume and 10: 0.65 by weight. The two- component mixture must be applied within approximately 15 minutes (pot life at 23oC / 73oF). At a higher temperature, the pot life is shorter.Prepare only the amount that can be applied within this period of time.

As temperature increases, pot life decreases. General pot life data for Kommerling 677NA is as follows:15 minute pot life at 20oC (68oF) material temperature8 minute pot life at 30oC (86oF) material temperature4 minute pot life at 40oC (104oF) material temperature

Note: The mixing ratio of Part A to Part B can go to 10: 1.1 by volume without a detrimental affect on mechanical properties. Undercatalyzing must be avoided.

Curing: Kommerling GD 677NA should not be applied below 10oC (50oF). The curing speed of Kommerling GD 677NA depends on the ambient temperature of the units after fabrication:• At 10oC (50oF) the curing time doubles or triples.• At 30oC (860F) curing times are shortened by 50%.• A tack free surface is reached after approximately 5 hours at 23oC (73oF). IG units should not be moved or subjected to excessive stresses until sealant has nearly reached full cure.

Cleaning: Citrus based solvents can be used to clean tools and equipment immediately after use to remove fresh uncured material.

Equipment: The following equipment is suitable for applying Kommerling GD 677NA: GRACO Hydra-Mate Shovel Pumps equipped with King air motors, GRACO Hydramate Shovel Pumps equipped with Bulldog® air motors and 1-1/4” supply line, Reinhardt Technik Pumps, Schwartz, Lisec and Bystronic automated lines.

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