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Scotch-WeldTM
Urethane A dhesi ve
DP605 NS Of f-White • DP640 Brown
Product Description 3M™ Scotch-Weld™ Urethane Adhesives DP605 NS Off-White and DP640 Bro wn
are two-part, non-sag urethane adhesives. They feature tough, flexible bonds with
good adhesion to a wide v ariety of substrates, especially w ood and man y properly
abraded and cleaned plastics. Good adhesion can also be obtained on etched
aluminum as well as primed aluminum, steel and glass. For maximum bond durability
under moisture conditions, priming of glass and metal substrates is required.
Av ailable in bulk containers as 3M™ Scotch-Weld™ Urethane Adhesive 605 NS
Of f-White B/A or 3M™ Scotch-Weld™ Urethane Adhesive 3549 B/A.
Features • Tough, flexible bonds • 5 or 40 minute worklife
• Non-Sag/Thixotropic • Bonds wood and many plastics
• 1:1 Mix Ratio • Low halogen content (3M™ Scotch-Weld™
Urethane Adhesive DP605 NS)
Technical Data May, 2010
Typical Uncured
Physical Pr operties Note: The follo wing technical information and data should be considered representativ e
or typical only and should not be used for specification purposes.
Scotch-Weld Scotch-Weld
Urethane Adhesive Urethane Adhesive
Product DP605 NS Off-White DP640 Brown
Color Off-White Brown
Base Resin Polyol/Isocyanate Polyol/Isocyanate
Mix Ratio (B:A) Volume 1:1 1:1
Weight 1:1.08 1:1.09
Net Weight Base 8.8-9.2 10.1-10.5
Lbs./Gal. Accelerator 9.7-10.2 11.1-11.5
Viscosity1a Base 11-20 –
(Approx.) time to deliver Accelerator 11-20 –
20 gms @ 20 psi thru a .104"
orifice @ 75°F (24°C) seconds.
Viscosity1b
Brookfield RVF @ 10 rpm Base
(#6 Spindle) – 10,000-40,000
cps @ 75°F (24°C) Accelerator
(#5 Spindle) – 15,000-55,000
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1a. Viscosity determined using 3M test method C-1019. Procedure involves pressure flowmeter, .104 orifice sample cup,
pressure of 20 psi and temperature of 75°F ± 2°F (24°C ± -16°C).
1b. Viscosity determined using C-1D. Procedure involves using a RVF Brookfield viscometer with either a #6 or #5 spindle at
10 rpm.
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Product 3M™ Scotch-Weld™ 3M™ Scotch-Weld™
Urethane Adhesive Urethane Adhesive
DP605 NS Off-White DP640 Brown
Physical:
Color Off-White Brown
Shore A Hardness 75-85 70-80
(ASTM D 2240)
Time to Handling Strength215-20 min. @ 23°C (73°F) 6-8 hrs. @ 23°C (73°F)
Cure Time348 hours @ 23°C (73°F) 7 days @ 23°C (73°F)
Elongation4100% 100%
Scotch-Weld Scotch-Weld
Urethane Adhesive Urethane Adhesive
Electrical: DP605 NS Off-White DP640 Brown
Dielectric Constant 3.1 @ 1 KHz @ 23°C 5.9 @ 1 KHz @ 23°C
(ASTM D 150)
Dissipation Factor .021 @ 1 KHz @ 23°C .12 @ 1 KHz @ 23°C
(ASTM D 150)
Dielectric Strength 640 volts/mil 470 volts/mil
(ASTM D 149)
Volume Resistivity 1.0 x 1014 ohm-cm 2.6 x 1012 ohm-cm
(ASTM D 257)
Scotch-Weld Scotch-Weld
Urethane Adhesive Urethane Adhesive
Thermal: DP605 NS Off-White DP640 Brown
Wt. loss by Thermal55% @ 300°C –
Gravimetric Analysis
Coefficient of Thermal6121 x 10-6 below 41°C –
Expansion (in./in./°C) 219 x 10-6 above 41°C –
Thermal Conductivity70.101 @ 45°C –
(btu-ft./sq. ft.-hr. °F)
Glass Transition Temp841°C –
Typical Cured
Thermal Properties Note: The follo wing technical information and data should be considered representativ e
or typical only and should not be used for specification purposes.
2. Handling strength determined per 3M test method C-3179. Time to handling strength taken to be that time required to achieve
50 psi OLS strength using aluminum substrates.
3. The cure time is defined as that time required for the adhesive to achiev e a minimum of 80% of the ultimate strength as
measured by aluminum - alumin um OLS .
4. Elongation is determined using 3M test method C-3094/ASTM D 882.
5. Weight loss b y TGA reported as that temperature at which 5% weight loss occurs by TGA in air at 5°C rise per minute per
ASTM 1131-86.
6. TCE determined with TMA Analyzer using a heating rate of 50°F (10°C) per minute. Second heat v alues given.
7. Thermal conductivity determined using ASTM C177 and C-matic Instrument with 2" diameter samples.
8. Glass transition temperature (Tg) determined using DSC Analyzer with a heating rate of 68°F (20°C) per minute . Second heat
values giv en.
3M™Scotch-Weld™
U rethane Adhesive
DP605 NS Off-White • DP640 Brown
3M™Scotch-Weld™
U rethane Adhesive
DP605 NS Off-White • DP640 Brown
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Typical Cured
Thermal Properties
(continued) Solvent Resistance:9Results for 3M™ Scotch-Weld™ Urethane Adhesive
DP605 NS Off-White only.
(Visual check after immersion in specified solvent at 23°C [73°F])
1 Hour 1 Month
Acetone A B
Isopropyl Alcohol A A
Freon®TF A A
Freon®TMC B C
1,1,1-Trichloroethane A B
RMA Flux A A
Key: A-Unaffected; B-Sight Attack; C-Moderate/Severe Attack
9. Solvent resistance w as determined using cured (24 hrs RT + 2 hrs 160°F [71°C]) samples (1/2" x 4" x 1/8" thickness) immersed
in the test solvent for 1 hour and 1 month. After the allotted period of time the sample was removed and visually examined for
surface attac k as compared to the control.
K e y: A - Unaffected - no change to color or surface texture.
B - Slight attack - noticeab le swelling of surface .
C - Moderate/se vere attack - extreme swelling of surface .
Note: The follo wing technical information and data should be considered representativ e
or typical only and should not be used for specification purposes.
3M™ Scotch-Weld™ Urethane Adhesive DP605 NS can be considered “low
halogen”. Low halogen is defined by the Electrotechnical Commission (IEC)
61249-2-21 standard as having less than 900 ppm chlorine, 900 ppm bromine,
and less than 1500 ppm total chlorine and bromine.
3M™ Scotch-Weld™ Urethane Adhesive DP605 NS Test Results
Halogens (determined by ion chromatography)
Total Chlorine (ppm) Total Bromine (ppm) Total Halogens (ppm)
670 < 10 < 800
3M™Scotch-Weld™
U rethane Adhesive
DP605 NS Off-White • DP640 Brown
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Typical Adhesive
Performance
Characteristics
Note: The follo wing technical information and data should be considered representativ e
or typical only and should not be used for specification purposes.
The follo wing product performance data were obtained in the 3M laboratory under
the conditions specified. The following data sho ws typical results obtained with
3M™ Scotch-Weld™ Urethane Adhesives DP605 NS Off-White and DP640 Bro wn
when applied to properly prepared substrates, cured for 7 days at 73°F (23°C) under
2 psi cure pressure, and tested according to the test methods indicated.
Overlap Shear
Overlap shear bonds were tested on 1" wide test specimens with a 1/2" o verlap of the
adhesi v e bonded area. Substrates were bonded after surf aces were prepared according
to the surface preparation section. The y were cured for 1 week at 73°F (23°C) prior
to testing. Tests were run according to Test Method ASTM D1002-72.
OLS (psi)
3M™ 3M™
Scotch-Weld™ Scotch-Weld™
Urethane Urethane
Adhesive Adhesive
Substrate Bondline T est DP605 NS DP640
Substrate Thickness (in.) Thickness (in.) Temperature (°F) Off-White Bro wn
CRS/CRS .035 .005 73 (23°C) 1350 2000
CRS/CRS .035 .005 180 (82°C) 140 300
AI/AI .063 .005 73 (23°C) 1460 2000
EPDM/Wood .250/.125 .005 73 (23°C) 100
SBR/Wood .250/.125 .005 73 (23°C) 100 + SF*
PC/PC .125 .005 73 (23°C) 640 1850*
PVC/PVC .125 .005 73 (23°C) 550 950*
FRP/FRP .125 .005 73 (23°C) 1180 1150*
CRS - cold rolled steel
Al - aluminum
EPDM - ethylene propylene diene monomer
SBR - styrene butadiene rubber
PC - polycarbonate
PVC - polyvinyl chloride
FRP - fiberglass reinforced plastic
*Substrate Failure
Bondline Thickness Stud y (Tested according to ASTM D 1002-72) OLS (psi)
3M™ Scotch-Weld™
Substrate Bondline Test Urethane Adhesive
Substrate Thickness (in.) Thickness (in.) Temperature (°F) DP605 NS Off-White
CRS/CRS .035 .005 73 (23°C) 1350
CRS/CRS .035 .010 73 (23°C) 1150
CRS/CRS .035 .015 73 (23°C) 1050
CRS/CRS .035 .020 73 (23°C) 850
3M™Scotch-Weld™
U rethane Adhesive
DP605 NS Off-White • DP640 Brown
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3M™EPX™
Pneumatic A pplicator
Delivery Rates 1/4 in. Nozzle
Adhesive* gms/minute
3M™ Scotch-Weld™ Urethane Adhesive DP605 NS Off-White 68.5
3M™ Scotch-Weld™ Urethane Adhesive DP640 Brown 44.7
50 ml A pplicator – Maximum Pr essure 50 psi
*Tests were run at a temperature of 70°F ± 2°F (21°C ± 1°C) and at maximum applicator pressure.
Handling/Curing
Information Directions f or Use
1. For optimum strength structural bonds, paint, oxide films, oils, dust, mold release
agents and all other surface contaminants must be completely remo v ed. Howe v er,
the amount of surface preparation directly depends on the required bond strength
and the environmental aging resistance desired by the user. For suggested surface
preparations on common substrates, see the section on surface preparation.
2. These products consist of two parts.
Mixing:
F or Duo-P ak Cartridges - 50 ml
Remov e the Scotch-Weld urethane adhesi v e DP605 NS Off-White or DP640
Bro wn duo-pak cartridge from its foil package and place it into the 3M™ EPX
Applicator. Remove the cap and dispense a small amount of adhesive to equalize
piston displacement and to assure that no material is blocking either the base or
accelerator ports. Attach the mixing nozzle to the duo-pak cartridge and apply the
adhesi v e to clean surf aces. To store a partially used duo-pak cartridge leave
mixing nozzle in place and replace after storage. Note: Scotch-Weld urethane
adhesi v e DP605 NS Off-White is sensiti v e to moisture. For best results, use the
entire contents of the cartridge within a fe w weeks after remo ving the cartridge
from the sealed foil pack. If extended storage is necessary, the duo-pak cartridge
should be stored in a sealed plastic bag. For hand mixing, e xpel the desired
amount of adhesi v es and mix thoroughly (10-15 seconds after uniform color is
obtained).
Typical Adhesive
Performance
Characteristics
(continued)
Note: The follo wing technical information and data should be considered representativ e
or typical only and should not be used for specification purposes.
Peel Strength
Peel strength tests were run on 1" wide specimens that were aged for 1 week at 73°F
(21°C). The 180° peel testing was run according to Test Method ASTM D1876-61T.
Substrates were prepared according to the surface preparation section.
Peel Strength (piw)
3M™ Scotch-Weld™
Substrate Bondline Test Urethane Adhesive
Substrate Thickness (in.) Thickness (in.) Temperature (°F) DP605 NS Off-White
CRS/CRS .022 .005 73 (23°C) 13
.022 .015 73 (23°C) 18
CRS/CRS .035 .005 73 (23°C) 36
.035 .015 73 (23°C) 47
AI/AI .022 .005 73 (23°C) 17
3M™Scotch-Weld™
U rethane Adhesive
DP605 NS Off-White • DP640 Brown
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Handling/Curing
Inf ormation (continued) For Duo-Pak Cartridges - 200/400 ml
Directions for Use: While holding cartridge in an upright position, remove insert
from duo-pak cartridge by unscre wing plastic nut. Detach metal removal disc
from insert to free plastic nut nozzle attachment. Clear orifices if necessary.
Attach mixing nozzle and secure with plastic nut. Place cartridge into 3M™
EPX Applicator. Discard a small quantity of dispensed adhesive to assure both
components are dispensing equally. Apply adhesive to clean surfaces, join parts,
secure until set up (15 minutes @ 75°F (24°C) for 3M™ Scotch-Weld™
Urethane Adhesi ve DP605 NS Off-White, 6-8 hours for 3M™ Scotch-Weld™
Urethane Adhesi ve DP640 Brown @ 75°F (24°C). Leave nozzle attached to
store. Replace nozzle after storage.
F or Bulk Containers
Mix thoroughly by weight or volume in the ratios specified in the typical
uncured properties section. Resulting color should be uniform. After opening,
containers of adhesi v e should be used completely. If storage of partially used
containers is necessary, flush each container with dry nitrogen just before
sealing the containers.
4. Application to the substrates should be made within 5 minutes for
Scotch-Weld
urethane adhesi v e DP605 NS Off-White or 40 minutes for
Scotch-Weld
urethane adhesi v e DP640 Brown. Larger quantities and/or higher temperatures
will reduce this working time.
5. Join the adhesi ve coated surfaces and allo w to cure at 60°F (16°C) or above
until firm. Heat up to 200°F (93°C) will speed curing.
6.
Scotch-Weld
urethane adhesiv e DP605 NS Of f-White will fully cure in 48
hours @ 75°F (24°C).
Scotch-Weld
urethane adhesi v e DP640 Brown will fully
cure in 7 days 75°F (24°C).
7. K eep parts from moving during cure. Contact pressure is necessary. Maximum
shear strength is obtained with a 3-5 mil bond line.
8. Excess uncured adhesi ve can be cleaned up with ketone type solvents.*
*Note: When using solvents, e xtinguish all ignition sources, including pilot lights,
and follo w the manuf acturer’s precautions and directions for use.
Adhesive co v erage (typical): A 0.005 in. thick bondline will yield a coverage of
320 sq. ft./gallon.
A pplication Equipment
Suggestions For small or intermittent applications, the 3M EPX applicator is a convenient method
of application.
For larger applications, these products may be applied by use of flow equipment.
Two-part mixing/proportioning/dispensing equipment is available for intermittent or
production line use. These systems may be desirable because of their v ariable shot
size and flo w rate characteristics and are adaptable to man y applications.
3M™Scotch-Weld™
U rethane Adhesive
DP605 NS Off-White • DP640 Brown
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Surface Preparation F or optimum strength structural bonds, paint, oxide films, oils, dust, mold release
agents and all other surface contaminants must be completely remo v ed. Howe v er, the
amount of surface preparation directly depends on the required bond strength and the
environmental aging resistance desired by the user.
The follo wing cleaning methods are suggested for common surf aces:
Steel:
1. Wipe free of dust with oil-free solvent such as acetone or isoprop yl alcohol.*
2. Sandblast or abrade using clean fine grit abrasives (150 grit or finer).
3. Wipe again with solvent to remo ve loose particles.
4. If a primer is used, it should be applied within 4 hours after surface preparation.
Aluminum:
1. Alkaline Degrease: Oakite 164 solution (9-10 oz./gallon w ater) at 190°F ± 10°F
(88°C ± -23°C) for 10-20 minutes. Rinse immediately in large quantities of cold
running water.
2. Acid Etch: Place panels in the follo wing solution for 10 minutes at 150°F ± 5°F
(66°C ± -20°C).
Sodium Dichromate 4.1 - 4.9 oz./gallon
Sulfuric Acid, 66°Be 38.5 - 41.5 oz./gallon
2024-T3 aluminum (dissolved) 0.2 oz./gallon minimum
Tap Water as needed to balance
3. Rinse: Rinse panels in clear running tap water.
4. Dry: Air dry 15 minutes; force dry 10 minutes at 150 ± 10°F (66°C ± -20°C).
5. If primer is to be used, it should be applied within 4 hours after surface
preparation.
Plastics/Rubber:
1. Wipe with isopropyl alcohol.*
2. Abrade using fine grit abrasives (150 grit or finer).*
3. Wipe with isopropyl alcohol.*
Glass:
1. Solvent wipe surf ace using acetone or MEK.*
2. Apply a thin coating (0.0001 in. or less) of 3M™ Scotch-Weld™ Metal Primer
EC3901 to the glass surfaces to be bonded and allow the primer to dry 60 minutes
at room temperature before bonding.
*Note: When using solvents, e xtinguish all ignition sources, including pilot lights,
and follo w the manuf acturer’s precautions and directions for use.
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3M and Scotch-Weld are trademarks
of 3M Company.
Freon is a registered trademark of E.I.
DuPont de Nemours Co.
Printed in U.S.A.
©3M 2010 78-6900-7083-0 (5/10)
Storage Store products at 60-80°F (16-27°C) for maximum storage life. Rotate stock on a
“first-in first-out” basis.
Shelf Life When stored in the original, unopened container at the storage conditions suggested,
these products have a shelf life of 12 months from date of shipment.
3M™Scotch-Weld™
U rethane Adhesive
DP605 NS Off-White • DP640 Brown
Refer to Product Label and Material Safety Data Sheet for health and safety information before using this
product. For additional health and safety inf ormation, call 1-800-364-3577 or (651) 737-6501.
Precautionary
Information
Recycled Paper
40% pr e-consumer
10% post-consumer
The technical information, recommendations and other statements contained in this document are
based upon tests or experience that 3M believes are reliable, but the accuracy or completeness of such
information is not guaranteed.
Technical Information
Unless an additional warranty is specifically stated on the applicable 3M product packaging or product
literature, 3M warrants that each 3M product meets the applicable 3M product specification at the time
3M ships the product. 3M MAKES NO OTHER WARRANTIES OR CONDITIONS, EXPRESS OR
IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OR CONDITION OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR ANY IMPLIED WARRANTY
OR CONDITION ARISING OUT OF A COURSE OF DEALING, CUSTOM OR USAGE OF TRADE.
If the 3M product does not conform to this warranty, then the sole and exclusive remedy is, at 3M’s
option, replacement of the 3M product or refund of the purchase price.
Warranty,
Limited Remedy,
and Disclaimer
Except where prohibited by law, 3M will not be liable for any loss or damage arising from the 3M product,
whether direct, indirect, special, incidental or consequential, regardless of the legal theory asserted,
including warranty, contract, negligence or strict liability.
Limitation of Liability
This Industrial Adhesives and Tapes Division product was manufactured under a 3M quality system registered to ISO 9001:2000 standards.
ISO 9001:2000
Many factors beyond 3M’s control and uniquely within user’s knowledge and control can affect the use
and performance of a 3M product in a particular application. Given the variety of factors that can affect
the use and performance of a 3M product, user is solely responsible for evaluating the 3M product and
determining whether it is fit for a particular purpose and suitable for user’s method of application.
Product Use
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Industrial Adhesives and Tapes Division
3M Center, Building 225-3S-06
St. Paul, MN 55144-1000
800-362-3550 • 877-369-2923 (Fax)
www.3M.com/industrial
