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-WeldTM
Epoxy Adhesives
DP105 Clear
Technical Data January 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
even when cured in larger masses where many clear epoxy systems will often turn
amber from the reaction exotherm.
Features
• 4 minute worklife
• High peel strength
• Flexible
• 1:1 mix ratio
• 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.
- 2 -
3M™ Scotch-Weld™ Epoxy
Adhesive DP105 Clear
Physical
Color
Clear
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:
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.
3. 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.
4. 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.
5. 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.
6. 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).
7. 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.
8. TCE determined using Dupont TMA
Analyzer using a heating rate of
50°F (10°C) per minute. Second
heat values given.
9. 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.
10. Thermal conductivity determined
using ASTM C177 and C-matic
Instrument using 2 inch diameter
samples.
11. 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:
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. (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
- 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
1002-72.)
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. (Test per ASTM D
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.
- 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.
- 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, 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: 2000
This Industrial Adhesives and Tapes Division product was manufactured under a 3M quality system registered to ISO 9001: 2000 standards.
3
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 2015 ( E ) 78-6900-9675-1
Mouser Electronics
Authorized Distributor
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DP105-Clear-200ml DP-105 CLEAR