Scotch-WeldTM
Epoxy Adhesive
DP405 Black
Technical Data February, 2015
Product Description
3M™ Scotch-Weld™ Epoxy Adhesive DP405 Black is a two-part, 2:1 mix ratio, toughened epoxy structural
adhesive which has a 5 minute work life and accelerated cure. It exhibits excellent shear and peel strengths
along with good impact resistance and durability. It bonds extremely well to many metal and composite
surfaces. It also has lower odor when compared to traditional fast cure epoxies and acrylic adhesives.
Features
• Excellent shear and peel strengths
• Easy mixing
• 5-minute work life
• Low odor
Note: The following technical information and data should be considered representative or
typical only and should not be used for specification purposes.
Product
3M™ Scotch-Weld™
Epoxy Adhesive
DP405 Black
Color
Base (B)
Accelerator (A)
Black
Clear
Net Weight (lbs./gallon)
Base (B)
Accelerator (A)
Approx. 10
Approx. 9.2
Viscosity
1
@ 73°F (23°C)
Base (B)
Accelerator (A)
11,000 cps
6,500 cps
Base Resin
Epoxy
Mix Ratio (B:A)
By volume
By weight
2 : 1
2.1 : 1
Work Life
2
@ 73°F (23°C)
Nozzle mixed
4 minutes
Applied Open Time
3
3 minutes
Time to Handling Strength
4
8 - 10 minutes
1Brookfield RVF Viscometer, #7 spindle at 20 rpm.
2Approximate time during which material can remain in a mixer nozzle and still be expelled without undue force on the applicator.
3Approximate time after application of adhesive that bonds can be made without adversely affecting wetting out of adhesive and ultimate
performance levels.
4Time to achieve approximate 50 psi Overlap Shear Strength (OLS) when cured at (73°F) 23°C.
Typical Uncured
Physical Properties
™ Scotch-Weld™
Epoxy Adhesive
DP405 Black
Note: The following technical information and data should be considered representative or
typical only and should not be used for specification purposes.
Product
3M™ Scotch-Weld™ Epoxy
Adhesive DP405
Physical
Color
Black
Shore D Hardness
75-80
Electrical
Dielectric Strength (ASTM D 149)
764 volts/mil
Volume Resistivity (ASTM D 257)
4.4 x 10
15
ohm-cm
Dielectric Constant (ASTM D 150)
4.1@ 1 KHz @ 23°C (73°F)
Dissipation Factor (ASTM D 150)
0.016 @ 1 KHz @ 23°C (73°F)
Aluminum, Overlap Shear, at Temperature (PSI) (ASTM D1002)
Temperature
3M™ Scotch-Weld™
Epoxy Adhesive DP405
-67°F (-55°C)
4500
73°F (23°C)
4500
180°F (82°C) (15 min.)
1
630
180°F (82°C) (30 min.)
1
750
180°F (82°C) (1 hr.)
1
940
180°F (82°C) (4 hrs.)
1
900
250°F (121°C) (15 min.)
1
400
1Represents time in test chamber oven before test.
Typical Adhesive
Performance
Characteristics
™ Scotch-Weld™
Epoxy Adhesive
DP405 Black
Metals, Overlap Shear, Tested @ 73°F (23°C) (PSI) (ASTM D1002)
Product
3M™ Scotch-Weld™ Epoxy
Adhesive DP405
Aluminum
MEK/abrade/MEK
1
2580
Cold Rolled Steel
MEK/abrade/MEK
1
2260
Galvanized Steel
MEK/abrade/MEK
1
2050
Stainless Steel
MEK/abrade/MEK
1
2860
Copper
MEK/abrade/MEK
1
2300
Brass
MEK/abrade/MEK
1
2830
1MEK wipe/Abrade/MEK wipe: See Surface Preparation Section E for additional information.
Aluminum, Floating Roller Peel, at Temperature (PIW) (ASTM D3167)
Temperature
3M™ Scotch-Weld™
Epoxy Adhesive DP405
-67°F (-55°C)
18
73°F (23°C)
40
180°F (82°C)
8
Typical Adhesive
Performance
Characteristics
(Continued)
™ Scotch-Weld™
Epoxy Adhesive
DP405 Black
Note: The following technical information and data should be considered representative or
typical only and should not be used for specification purposes.
Other Substrates, Overlap Shear Tested @ 73°F (23°C) (ASTM D1002)
Substrate
3M™ Scotch-Weld™
Epoxy Adhesive DP405
ABS
300
PVC
370
Polycarbonate
360
Epoxy FRP
2070
Phenolic
1200
Environmental Resistance, Aluminum (Etched),
Measured by Overlap Shear Tested @ 73°F (23°C) (PSI) (ASTM D1002)
Environment
Condition
3M™ Scotch-Weld™
Epoxy Adhesive DP405
Room Temperature
73°F (23°C)/50% RH, 30 days
4790
Water Vapor
150°F% 80% RH, 30 days
4420
Water Soak
73°F, 30 days
3820
80°C (176°F)
30 days
5400
Salt Spray
38°C/5% NaCl, 14 days
3900
IPA
73°F (23°C), 30 days immersion
4830
Methyl Ethyl Ketone
73°F (23°C), 30 days immersion
4610
Gasoline
73°F (23°C), 30 days immersion
4540
Diesel Fuel
73°F (23°C), 30 days immersion
5030
50% Antifreeze
73°F (23°C), 30 days immersion
4840
Motor Oil
73°F (23°C), 30 days immersion
4990
Thermal cycle
(-30°C/23°C/100%RH/70°C), 30
days
5340
Typical Adhesive
Performance
Characteristics
(continued)
™ Scotch-Weld™
Epoxy Adhesive
DP405 Black
Note: The following technical information and data should be considered representative or
typical only and should not be used for specification purposes.
Rate of Strength Build-Up
Aluminum, Overlap Shear (5 mil bondline) (ASTM D1002)
Bonds Tested at 73°F 23°C)
Time in Oven
Cure Temperature
73°F (23°C)
120°F
1
(49°C)
140°F
1
(60°C)
15 minutes
43
970
4380
30 minutes
110
3090
5900
1 hour
240
–
–
2 hours
630
–
–
3 hours
1630
–
–
5 hours
2220
–
–
6 hours
4410
–
–
24 hours
4790
–
–
1This Represents the oven temperature to which the bonds were subjected for the prescribed time. The average bondline
temperature during he cure time will be somewhat lower than the oven temperature.
A. Overlap Shear (ASTM D1002)
Overlap Shear (ASTM D-1002-64, 3M Test Method C-236) strength was
measured on 1" wide x 1/2" overlap specimen. These bonds were made
individually using 1" x 4" pieces of substrates except for Aluminum. Two panels
0.063 in. thick, 4 in. x 7y in of 2024T-3 clad aluminum were bonded and cut into
1 in. wide samples after 24 hours. The thickness of the adhesive bond line was
approximately 0.005". All strengths were measured at 73°F (23°C) except when
noted.
The separation rate of the testing jaws was 0.1 in. per minute for metals, 2 in. per
minute for plastics and 20 in. per minute for rubbers. The thickness of the substrates
were: steel, 0.060 in.; other metals, 0.05-0.064 in.; rubbers, 0.125in.; plastics, 0.125
in. and samples were allowed to cure at 75°F (24°C) and approximately 50% RH for 1
week before tested. The separation rate of the testing jaws was 0.1 inch per minute for
metals and 2 inches per minute for plastics.
B. Floating Roller Peel (Bell Peel) (ASTM D3167)
Bell peel strengths were measured on 1/2 in. wide bonds at the temperatures noted.
The testing jaw separation rate was 6 in. per minute. The bonds were made with
0.064 in. bonded to 0.025 in. thick adherends.
C. Cure Cycle
With the exception of Rate of Strength Build-Up Tests, all bonds were cured 7 days at
73°F (23°C) at 50% RH before testing or subjected to further conditioning or
environmental aging.
Typical Curing
Characteristics
Substrates and
Testing
™ Scotch-Weld™
Epoxy Adhesive
DP405 Black
3M™ Scotch-Weld™ Epoxy Adhesive DP405 Black is supplied in dual syringe plastic
duo- pak cartridges as part of the 3M™ EPX™ Applicator System. The duo-pak
cartridges are supplied in 37 ml, 200 ml and 400 ml configurations. To use the EPX
cartridge system simply insert the duo-pak cartridge into the EPX applicator. Next,
remove the duo-pak cartridge cap and expel a small amount of adhesive to be sure both
sides of the duo-pak cartridge are flowing evenly and freely. If simultaneous mixing of
Part A and Part B is desired, attach the EPX mixing nozzle to the duo-pak cartridge
and begin dispensing the adhesive.
When mixing Part A and Part B manually the components must be mixed in the
ratio indicated in the typical uncured properties section of this data sheet. Complete
mixing of the two components is required to obtain optimum properties.
Two-part mixing/proportioning/dispensing equipment is available for intermittent or
production line use. These systems are ideal for line uses because of their variable
shot size and flow rate characteristics and are adaptable to most applications.
Apply adhesive to clean, dry surfaces, joint parts and secure until adhesive sets (see
rate of strength build up).
Surface Preparation The following surface preparations were used for substrates described in this Technical
Data Sheet.
A. Aluminum Etch
Optimized FPL Etch - 3M (test method C-2803)
1. Alkaline degrease – Oakite 164 solution (9-11 oz./gallon water) at 190°F ± 10°F
(88°C ± 5°C) for 10-20 minutes. Rinse immediately in large quantities of cold
running water (3M test method C-2802).
2. Optimized FPL Etch Solution (1 liter):
Material Amount
Distilled Water 700 ml plus balance of liter (see below)
Sodium Dichromate 28 to 67.3 grams
Sulfuric Acid 287.9 to 310.0 grams
Aluminum Chips 1.5 grams/liter of mixed solution
To prepare 1 liter of this solution, dissolve sodium dichromate in 700 ml of distilled
water. Add sulfuric acid and mix well. Add additional distilled water to fill to 1
liter. Heat mixed solution to 66 to 71°C (150 to 160°F). Dissolve
1.5 grams of 2024 bare aluminum chips per liter of mixed solution. Gentle
agitation will help aluminum dissolve in about 24 hours.
To FPL etch panels, place them in the above solution at 150 to 160°F (66 to 71°C)
for 12 to 15 minutes.
Note: Review and follow precautionary information provided by chemical suppliers
prior to preparation of this etch solution.
3. Rinse immediately in large quantities of clear running tap water.
Handling and
Application
Information
Directions for Use
™ Scotch-Weld™
Epoxy Adhesive
DP405 Black
4. Dry – air dry approximately 15 minutes followed by force dry at 140°F
(60°C) maximum for 10 minutes (minimum).
5. Both surface structure and chemistry play a significant role in determining the
strength and permanence of bonded structures. It is therefore advisable to bond or
prime freshly primed clean surfaces as soon as possible after surface preparation in
order to avoid contamination and/or mechanical damage. Please contact your 3M
sales representative for primer recommendations.
B. Oakite Degrease
Oakite 164 solutions (9-11 oz./gallon of water) at 190°F ± 10°F (88°C ± 5°C) for 2
minutes. Rinse immediately in large quantities of cold running water.
C. MEK/Abrade/MEK
Wipe surface with a methyl ethyl ketone (MEK) soaked swab, abrade and wipe
with a MEK soaked swab.* Allow solvent to evaporate before applying adhesive.
*Note: When using solvents, extinguish all ignition sources, including pilot lights, and
follow the manufacturer’s precautions and directions for use.
D. Isopropyl Alcohol Wipe Only Surface Preparation
Wipe surface with an isopropyl alcohol soaked swab.* Allow solvent to evaporate
before applying adhesive.
*Note: When using solvents, extinguish all ignition sources, including pilot lights, and
follow the manufacturer’s precautions and directions for use.
E. Isopropyl Alcohol/Abrade/Isopropyl Alcohol Surface Preparation
Wipe surface with an isopropyl alcohol soaked swab, abrade using clean fine grit
abrasives, and wipe with an isopropyl alcohol soaked swab.* Then allow solvent to
evaporate before applying adhesive.
*Note: When using solvents, extinguish all ignition sources, including pilot lights, and
follow the manufacturer’s precautions and directions for use.
Surface
Preparation
(Continued)
™ Scotch-Weld™
Epoxy Adhesive
DP405 Black
Storage Store products at 60-80°F (15-27°C) or refrigerate for maximum shelf life.
Shelf Life These products have a shelf life of 12 months in original duo-pak containers at room
temperature.
Technical Information 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.
Product Use 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.
Warranty,
Limited Remedy,
and Disclaimer
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.
Limitation of Liability 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.
ISO 9001: 2008
This Industrial Adhesives and Tapes Division product was manufactured under a 3M quality system registered to ISO 9001: 2008 standards.
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/structuraladhesives
3M, Scotch-Weld and EPX are
trademarks of 3M Company.
©3M 2015