3
Scotch-Weld
™
Rubber Toughened Instant Adhesiv es
RT300B•RT3500B
Product Description
3M™ Scotch-Weld™ Rubber Toughened Instant Adhesives are formulated with
a unique elastomer that maximizes impact, vibration, peel, and thermal cycling
resistance while providing tough flexible bonds. These adhesives are ideally suited
for bonding flexible substrates and dissimilar materials.
Technical Data May, 2011
Specific Featur es
• 3M™ Scotch-Weld™ Rubber Toughened Instant Adhesive RT300B (formerly
PR80) is a medium viscosity black, rubber toughened cyanoacrylate.
• 3M™ Scotch-Weld™ Rubber Toughened Instant Adhesive RT3500B (formerly
PR10) is a high viscosity, black, rubber toughened cyanoacrylate. It is formulated
to provide a more flexible bond than standard cyanoacrylates and has good gapfilling capabilities.
3M™Scotch-Weld
™
Rubber Toughened Instant Adhesives
RT300B • RT3500B
- 2 -
Typical Uncured
Physical Properties
Note: The following technical information and data should be considered representativ e or
typical only and should not be used for specification purposes.
3M™ Scotch-Weld™ Rubber Toughened Instant Adhesives
RT300B RT3500B
Color Black Black
Base Ethyl Hybrid Ethyl Hybrid
Appearance Liquid Liquid
Specific Gravity (g/ml) 1.1 1.1
Viscosity (cps) 300 - 1,000
3
1,000 - 3,000
1
5,000 - 10,000
2
Time to Handling Strength (sec) 20 - 50 20 - 90
Full Cure Time (hr) 24 24
1
Brookfield RVT, #3 spindle @ 20 rpm.
2
Brookfield RVT, #3 spindle @ 2.5 rpm.
3
Brookfield LFT, #2 spindle.
Typical Cured
Properties
Note: The following technical information and data should be considered representativ e or
typical only and should not be used for specification purposes.
3M™ Scotch-Weld™ Rubber Toughened Instant Adhesives
RT300B RT3500B
Continuous Temperature Range (°F) -65 to 200 -65 to 200
Intermittent Temperature Range (°F) -65 to 250 -65 to 250
Gap Fill (in) 0.004 0.008
Overlap Shear Strength (psi)
4
1,500 1,300
4
ASTM D1002 (grit-blasted steel).
3M™Scotch-Weld
™
Rubber Toughened Instant Adhesives
RT300B • RT3500B
- 3 -
Surface Preparation
For optimum 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 depends on the required bond strength and the
environmental aging resistance desired by the user. Typical quick surface
preparation would include wiping with a clean solvent (such as isopropyl alcohol*),
abrading the surface with a clean fine abrasive, and then wiping again with a clean
solvent to remove loose particles.
Directions for Use
1. Ensure that parts are clean, dry, and free from oil and grease.
2. A instant adhesive activator may be required if there are bonding gaps or
porous substrate surfaces, if substrates are low surface energy plastics
(e.g., polyethylene, polypropylene) or if substrates have acidic surfaces
(e.g., paper, leather).
3. Bond speed is typically very fast so ensure that parts are properly aligned before
dispensing.
4. Product is normally hand applied from the bottle. Apply sparingly to one surface
and press parts firmly together until handling strength is achieved. As a general
rule, as little cyanoacrylate as possible should be used. Over application will
result in slower cure speed and lower bond strength.
Cured Bond Characteristics
1. Full bond strength will typically be achieved within a 24 hour cure time.
2. Low humidity or low temperature conditions will slow down the cure rate.
3. After curing, 3M™ Scotch-Weld™ Rubber Toughened Instant Adhesive
bonds are suitable for use at temperatures up to 200F (93°C) continuously,
intermittently up to 250°F (121°C). At 220°F (105°C) the bond will be
approximately 40% of the strength at room temperature.
4. Cyanoacrylate bond resistance to most oils and solvents is excellent. Long term
humidity, moisture, or water immersion may affect the strength of a cured
cyanoacrylate bond depending on the substrates and the bond gap. Testing is
recommended to evaluate the effect.
*Note: When using solvents, extinguish all ignition sources, including pilot lights,
and follow the manufacturer’s precautions and directions for use.
Handling Information
Storage
For short term storage (<30 days), keep adhesiv e in a cool (60°F to 80°F [16°C to
27°C]), dry place out of direct sunlight. Keep containers tightly covered and free of
moisture. Refrigeration (40°F [4°C]) gives optimum long term storage stability.
Shelf Life
3M™ Scotch-Weld™ Rubber Toughened Instant Adhesives can be expected to have
a shelf life of six months from the date of shipment from 3M when stored under
refrigerated conditions.
3M™Scotch-Weld
™
Rubber Toughened Instant Adhesives
RT300B • RT3500B
- 4 -
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.
Precautionary
Information
Recycled Paper
40% pre-consumer
10% post-consumer
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/industrial
3M and Scotch-Weld are trademarks
of 3M Company.
Printed in U.S.A.
©3M 2011 78923671594 (5/11)
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
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literature, 3M warrants that each 3M product meets the applicable 3M product specification at the time
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and Disclaimer
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including warranty, contract, negligence or strict liability.
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This product was manufactured under a quality system registered to ISO 9001:2008 standards.
ISO 9001:2008
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and performance of a 3M product in a particular application. Given the variety of factors that can affect
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Product Use
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