Product
3M™ Scotch-Weld™ Epoxy
Adhesive DP105 Clear
Base Resins
Epoxy/Mercaptan
Color
Base (B)
Accelerator (A)
Clear
Clear
Net Weight
(Lbs./Gallon)
Base (B)
Accelerator (A)
9.1 - 9.5
9.4 - 9.8
Viscosity1, Approximate
@ 80°F (27°C)
Base (B)
Accelerator (A)
1,000 - 5,000 cps
8,000 - 16,000 cps
Mix Ratio (B:A)
By Volume
By Weight
1:1
1:0.97
Worklife2
@ 73°F (23°C)
2 gram
20 gram
5 minutes
4 minutes
3
Scotch-Weld™ Epoxy Adhesives
DP105 Clear
Technical Data October 2017
Product Description 3M™ Scotch-Weld™ Epoxy Adhesive DP105 Clear is available in larger
containers like 3M™ Scotch-Weld™ Epoxy Adhesive 105 B/A Clear.
3M™ Scotch-Weld™ Epoxy Adhesive DP105 Clear is a fast setting, very
flexible 1:1 mix ratio epoxy adhesive/sealant. Its flexibility when cured
makes it ideal for applications involving dissimilar surfaces where thermal
coefficient of expansion may be a problem. It is also unique in that it
retains its clear, colorless properties longer than most 5 minute epoxies.
Features
• 4 minute worklife
• Flexible
• Clear
Typical Uncured
Physical
Properties
Note: The following technical information and data should be considered
representative or typical only and should not be used for specification
purposes.
Footnotes:
1. Viscosity determined using 3M
test method C-1d. Procedure
involves Brookfield RVF, #7
spindle, 20 rpm and 80°F (27°C).
Measurement taken after 1 minute
rotation.
2. Worklife determined using 3M test
method C-3180. Procedure
involves periodically measuring a 2
gram mixed mass for self-leveling
and wetting properties. This time
will also approximate the usable
worklife in an EPX™ mixing nozzle.
3M™ Scotch-Weld™ Epoxy Adhesives
DP105 Clear
- 2 -
3M™ Scotch-Weld™ Epoxy
Adhesive DP105 Clear
Physical
Transparency and Color
Clear and colorless in thin
bondlines
Hardness Shore D (ASTM D 2240)
25-30
Worklife2
3-4 minutes
Tackfree Time3
10 minutes
Time to Handling Strength4
20 min. @ 23°C (73°F)
Cure Time5
48 hrs. @ 23°C (73°F)
Elongation6
120%
Tensile Strength6
600 psi
Thermal
Weight Loss by Thermal Gravimetric
1% @ 117°C (243°F)
Analysis (TGA)7
5% @ 289°C (552°F)
Thermal Coefficient of Expansion (TCE) by TMA8
(x 10-6 units/unit/°C)
Below Tg
Above Tg
—
181 (40-140°C range)
Glass Transition Temperature (Tg) by DSC9
Onset
Mid-Point
8°C (46°F)
15°C (59°F)
Thermal Conductivity10
.085
(@ 110°F on .250" samples)
BTU-ft./ft.2 - hr.-°F
Cal./sec -cm-°C
.35 x 10-3
Watt/m-°C
.147
Thermal Shock Resistance11
Pass 5 cycles
Potted Washer Olyphant Test
(3M/AdhD Test Method C-3174
without cracking
+100°C [air] to -50°C [liquid])
Electrical
Dielectric Constant @ 1 KHz
@ 23°C (73°F) [ASTM D 150]
9.2
Dissipation Factor @ 1 KHz
@ 23°C (73°F) [ASTM D 150]
0.22
Dielectric Strength (ASTM D 149)
Sample Thickness Approx. 30 mil
465 volts/mil
Volume Resistivity (ASTM D 257)
1.5 x 1010 ohm-cm
Typical
Cured
Properties
Footnotes:
1. Worklife determined using 3M test
method C-3180. Procedure
involves periodically measuring a 2
gram mixed mass for self-leveling
and wetting properties. This time
will also approximate the usable
worklife in an EPX™ mixing nozzle.
2. Tack-free determined per 3M test
method C-3173. Involves
dispensing 0.5 gram amount of
adhesive onto substrate and
testing periodically for no
adhesive transfer to metal
spatula.
3. Handling strength determined per
3M test method C-3179. Time to
handling strength taken to be that
required to achieve a 50 psi OLS
strength using aluminum
substrates.
4. The cure time is defined as that
time required for the adhesive to
achieve a minimum of 80% of
the ultimate strength as
measured by aluminum-
aluminum OLS.
5. Tensile and Elongation. Used
procedure in 3M test method C-
3094/ASTM D 882. Samples
were 2" dumbbells with .0125"
neck and .030" sample thickness.
Separation rate was 2 inches per
minute. Samples cured 2 hrs RT
plus 2 hrs/160°F (71°C).
6. Weight loss by TGA reported as
that temperature at which 5%
weight loss occurs by TGA in air
at 5°C (41°F) rise per minute per
ASTM 1131-86.
7. TCE determined using Dupont
TMA Analyzer using a heating rate
of 50°F (10°C) per minute. Second
heat values given.
8. Glass Transition Temperature (Tg)
determined using Perkin Elmer DSC
Analyzer with a heating rate of
68°F (20°C) per minute. Second
heat values given.
9. Thermal conductivity
determined using ASTM C177
and C-matic Instrument using 2
inch diameter samples.
10. Thermal shock resistance run per
3M test method C-3174. Involves
potting a metal washer into a 2" x
0.5" thick section and cycling this
test specimen to colder and
colder temperatures.
Note: The following technical information and data should be considered representative
or typical only and should not be used for specification purposes.
3M™ Scotch-Weld™ Epoxy Adhesives
DP105 Clear
- 3 -
3M™ Scotch-Weld™ Epoxy
Adhesive DP105 Clear
Overlap Shear (OLS) to12
(Bonds aged 24 hrs @ RT + 2 hrs @ 160°F (71°C)
Etched Aluminum
2000 psi
Sanded Aluminum (60 grit)
1500 psi
Cold Rolled Steel
1300 psi
Wood, Fir
300 psi
Glass, Borosilicate
200 psi
Glass, +3M 3901 Primer
250 psi
Polycarbonate
400 psi
Acrylic
250 psi
Fiberglass
1400 psi
ABS
300 psi
PVC
520 psi
Polypropylene
80 psi
Typical
Adhesive
Performance
Characteristics
The following product performance data was obtained in the 3M laboratory under the
conditions specified. The following data show typical results obtained with the 3M™
Scotch-Weld™ Adhesives when applied to properly prepared substrates, cured, and tested
according to the specifications indicated. This data was generated using the 3M™ Scotch-
Weld™ EPX™ Applicator System equipped with an EPX™ static mixer, according to
manufacturer’s directions. Thorough hand mixing should afford comparable results.
Note: The following technical information and data should be considered representative
or typical only and should not be used for specification purposes.
Footnotes:
11. Overlap shear (OLS) strengths
were measured on 1" wide 1/2"
overlap specimens. These bonds
were made individually using
1" x 4" pieces of substrate. The
thickness of the bond line was
0.005-0.008". All strengths
were measured at 70°F (21°C)
except where noted. (Test per
ASTM D 1002-72.)
The separation rate of the
testing jaws was 0.1" per minute
for metals, 2" per minute for
plastics and 20" per minute for
rubbers. The thickness of the
substrates were: steel, 0.060";
other metals, 0.05-0.064";
rubber, 0.125"; plastics, 0.125".
Rate of Strength Buildup
(OLS on Etched Aluminum)12
Bonds tested after:
1 hr @ RT
250 psi
6 hrs @ RT
500 psi
24 hrs @ RT
1000 psi
7 days @ RT
2000 psi
1 mo @ RT
2000 psi
Environmental Aging
(OLS on Etched Aluminum)12
Bonds tested after:
24 hrs RT + 2 hrs @ 160°F (71°C)
2000 psi
24 hrs RT + 2 hrs @ 240°F (116°C)
2200 psi
1 wk RT + 1 wk @ 90°F/90% RH
1800 psi
1 wk RT + 1 wk 248°F (120°C)
3000 psi
1 wk RT + 1 wk H2O Immersion
2000 psi
3M™ Scotch-Weld™ Epoxy Adhesives
DP105 Clear
- 4 -
3M™ Scotch-Weld™ Epoxy
Adhesive DP105 Clear
Overlap Shear Strength vs Temperature12
(Bonds cured 24 hr @ RT + 2 hrs @ 160°F [71°C]) Bonds
tested at:
-67°F (-53°C)
3500
psi
70°F (21°C)
2000
psi
120°F (49°C)
400
psi
150°F (66°C)
250 psi
180°F (82°C)
150 psi
180° Peel Strength vs Temperature13
(Bonds cured 24 hr @ RT + 2 hrs @ 160°F [71°C]) Bonds
tested at:
-67°F (-53°C)
3.0 piw
70°F (21°C)
35.0 piw
120°F (49°C)
5.0 piw
150°F (66°C)
2 .0 piw
180°F (82°C)
1.0 piw
Solvent Resistance14
One Hour/One Month
Acetone
A/A
Isopropyl Alcohol
A/A
Freon TF
A/A
Freon TMC
A/B
1,1,1 Trichloroethane
A/A
RMA Flux
A/A
Key: A - Unaffected, B - Slight Attack, C - Moderate/Severe Attack
swelling of surface.
Typical
Adhesive
Performance
Characteristics
(continued)
Note: The following technical information and data should be considered
representative or typical only and should not be used for specification
purposes.
Footnotes:
12. Overlap shear (OLS) strengths
were measured on 1" wide 1/2"
overlap specimens. These bonds
were made individually using
1" x 4" pieces of substrate. The
thickness of the bond line was
0.005-0.008". All strengths
were measured at 70°F (21°C)
except where noted. (Tests per
ASTM D 1002-72).
The separation rate of the
testing jaws was 0.1" per minute
for metals, 2" per minute for
plastics and 20" per minute for
rubbers. The thickness of the
substrates were: steel, 0.060";
other metals, 0.05-0.064";
rubber, 0.125"; plastics, 0.125".
13. T-peel strengths were measured
on 1" wide bonds at 73°F (23°C).
The testing jaw separation rate
was 20 inches per minute. The
substrates were 0.020" thick.
(Tests per ASTM D 1876-61T).
14. Solvent resistance was determined
using cured (24 hrs RT + 2hrs
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
attack as compared to the control.
Key: A - Unaffected - no change
to color or surface
texture.
B - Slight attack - noticeable
C - Moderate/severe attack
- extreme swelling of
surface.
15. Exotherm determined using the
stated mass mixed for 1 minute and
then by electronic thermocouple
measuring the peak temperature
and time to that temperature.
Exotherm15
Max. Temp/Time to Reach
2 gram mass
98°F (37°C)/5 min.
20 gram mass
230°F (110°C)/3 min.
3M™ Scotch-Weld™ Epoxy Adhesives
DP105 Clear
- 5 -
Handling/Curing
Information Directions for Use
1. For high strength structural bonds, paint, oxide films, oils, dust, mold
release agents and all other surface contaminants must be completely
removed. However, the amount of surface preparation directly depends
on the required bond strength and the environmental aging resistance
desired by user. For specific surface preparations on common substrates,
see the following section on Surface Preparation.
2. Uses gloves to minimize skin contact. Do not use solvents for cleaning
hands.
3. Mixing
For Duo-Pak Cartridges
3M™ Scotch-Weld™ Epoxy Adhesive DP105 Clear is supplied in a dual
syringe plastic Duo-Pak cartridge as part of the 3M™ Scotch-Weld™
EPX™ Applicator system. To use, simply insert the Duo-Pak cartridge into
the EPX™ applicator and start the plunger into the cylinders using light
pressure on the trigger. 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 automatic mixing of Part A and
Part B is desired, attach the EPX™ mixing nozzle to the Duo- Pak
cartridge and begin dispensing the adhesives. For hand mixing, expel the
desired amount of adhesive and mix thoroughly. Mix approximately 15
seconds after uniform color is obtained.
For Bulk Containers
Mix thoroughly by weight or volume in the proportions specified in the
Typical Uncured Properties section. Mix approximately 15 seconds after
uniform color is obtained.
4. For maximum bond strength apply adhesive evenly to both surfaces to be
joined.
5. Application to the substrates should be made within 3 minutes. Larger
quantities and/or higher temperatures will reduce this working time.
6. Join the adhesive coated surfaces and allow to cure at 60°F (16°C) or
above until completely firm. Heat up to 200°F (93°C), will speed curing.
These products will cure in 48 hours @ 75°F (24°C).
7. Keep parts from moving during cure. Contact pressure is necessary.
Maximum shear strength is obtained with a 3-5 mil bond line.
8. Excess uncured adhesive can be cleaned up with ketone type solvents.*
Adhesive Coverage: A 0.005 in. thick bondline will yield a coverage of
320 sq. ft./ gallon.
*Note: When using solvents, extinguish all ignition sources and
follow the manufacturer’s precautions and directions for
use.
3M™ Scotch-Weld™ Epoxy Adhesives
DP105 Clear
- 6 -
Surface Preparation For high strength structural bonds, paint, oxide films, oils, dust, mold
release agents and all other surface contaminants must be completely
removed. However, the amount of surface preparation directly depends on
the required bond strength and the environmental aging resistance desired
by the user.
The following cleaning methods are suggested for common surfaces:
Steel:
1. Wipe free of dust with oil-free solvent such as acetone, isopropyl
or alcohol solvents.*
2. Sandblast or abrade using clean fine grit abrasives.
3. Wipe again with solvent to remove loose particles.
4. If a primer is used, it should be applied within 4 hours after surface
preparation.
Aluminum:
1. Vapor Degrease: 3M™ Novec™ condensing vapors for 5-10 minutes.
2. 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.
3. Acid Etch: Place panels in the following solution for 10 minutes at
150°F ± 5°F (66°C ± 2°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
4. Rinse: Rinse panels in clean running tap water.
5. Dry: Air dry 15 minutes; force dry 10 minutes at 150°F ± 10°F (66°C ± 5°C).
6. 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.
3. Wipe with isopropyl alcohol.*
Glass:
1. Solvent wipe surface using acetone or MEK.*
*Note: When using solvents, extinguish all ignition sources and
follow the manufacturer’s precautions and directions for
use.
3M™ Scotch-Weld™ Epoxy Adhesives
DP105 Clear
- 7 -
Surface
Preparation
(continued)
• For small or intermittent applications the 3M™ Scotch-Weld™ EPX™
Applicator is a convenient method of application.
• For larger applications, these products may be applied by use of flow
equipment.
• Two-part meter/mixing/dispensing equipment is available for
intermittent or production line use. These systems may be desirable
because of their variable shot size and flow rate characteristics and are
adaptable to many applications.
3M™ Scotch-Weld™ Epoxy Adhesives
DP105 Clear
- 8 -
Storage and Shelf Life Store 3M™ Scotch-Weld™ Epoxy Adhesive DP-105 Clear at 60-80°F (15-27°C) for
maximum shelf life. These epoxy adhesive products have a shelf life of 2 years in their
unopened bulk containers and 15 months in Duo-Pak containers. Shelf life is determined
from the date of shipment from 3M.
Precautionary
Information
Refer to Product Label and Material Safety Data Sheet for health and safety information before using
this product. For additional health and safety information, call 1-800-364-3577 or (651) 737-6501.
Technical
Information
The technical information, guidance, and other statements contained in this document or otherwise
provided by 3M are based upon records, tests, or experience that 3M believes to be reliable, but the
accuracy, completeness, and representative nature of such information is not guaranteed. Such
information is intended for people with knowledge and technical skills sufficient to assess and apply
their own informed judgment to the information. No license under any 3M or third party intellectual
property rights is granted or implied with this information.
Product Selection
and 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. As a result, customer is solely
responsible for evaluating the product and determining whether it is appropriate and suitable for
customer’s application, including conducting a workplace hazard assessment and reviewing all
applicable regulations and standards (e.g., OSHA, ANSI, etc.). Failure to properly evaluate, select,
and use a 3M product and appropriate safety products, or to meet all applicable safety regulations,
may result in injury, sickness, death, and/or harm to property.
Warranty,
Limited
Remedy, and
Disclaimer
Unless a different warranty is specifically stated on the applicable 3M product packaging or product
literature (in which case such warranty governs), 3M warrants that each 3M product meets the
applicable 3M product specification at the time 3M ships the product. 3M MAKES NO OTHER
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ISO 9001
This Industrial Adhesives and Tapes Division product was manufactured under a 3M quality system registered to ISO 9001 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, Novec and EPX
are trademarks of 3M Company.
©3M 2017 E 78-6900-9675-1