WELD-ON 3
ACRYLIC PLASTIC CEMENT
SUBSTRATE RECOMMENDATIONS
WELD-ON 3 is formulated for cementing acrylic plastic to itself. It will also form strong bonds with other plastics
such as styrene, butyrate and polycarbonate to themselves. It will not bond to certain cross-linked acrylics.
BONDING RECOMMENDATIONS
WELD-ON 3 is being used by sign companies for cementing letters to acrylic panels. Strong butt joints are made
with flat sheets by using the soak method. Butyrate capping is cemented to cutout acrylic letters. It is being used
in industries for display items, plastic containers, housewares, bottles, etc.
GENERAL DESCRIPTION
Weld-On 3 is a very fast, clear, water thin, non-flammable, high strength, solvent-type acrylic cement. The bond is
affected by softening the surfaces to be joined and fusing them together. An initial bond will be formed within a
few minutes and its strength will increase rapidly. Substantial strength will be obtained within a few hours. Under
certain conditions, especially with high humidity, this cement may leave a white mark on the plastic (commonly
called blushing). For a more blush resistant, but somewhat slower acrylic cement, we suggest you try Weld-On 4
or 5.
BOND STRENGTH DATA
Lap joint bond strength is based on using 1 4鈥? thick substrate with 1 square inch bonding area.
SUBSTRATE MATERIAL 2 Hours 24 Hours 1 Week
Acrylic (Cast & Extruded) 800 PSI 2000 PSI 2500 PSI
Polycarbonate 800 1600 2400
Styrene 600 1300 2000
ADHESIVE PROPERTIES AND CHARACTERISTICS
COLOR: Clear
VISCOSITY: Water Thin
80% STRENGTH: 72 hours
SPECIFIC GRAVITY: 1.33 卤 .040
COVERAGE: Unknown, no way to determine
DIRECTIONS FOR USE
鈥? Parts to be joined should be clean and fit without forcing. Apply cement with syringe, eyedropper or brush.
Assemble while parts are still wet. If cement is applied to one surface, let the two surfaces be in gentle contact
for a few seconds to allow the cement to soften the dry surfaces, then press parts together in firm contact.
For capillary method, parts are placed lightly together and cement is applied to the edge of the joint with syringe
鈥?
or eyedropper. By capillary action, the cement will flow a considerable distance (approx. 1 4鈥?) between two such
surfaces. Allow a few seconds for the cement to soften the surfaces. Press parts firmly together.
For soak method, vertically dip surfaces until softened (approx. 2 to 5 minutes), then join pieces firmly together.
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Initial bonds form very quickly. Bond strength continues to develop very rapidly, reaching high strength in 24 to
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48 hours. Thereafter, strength will continue to increase gradually for some weeks.
In many cases, this cement dries too fast to apply by brush to the parts before they are joined.
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If crazing is a problem, we suggest you consider annealing before cementing.
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漏IPS Copyright 07/02 (I-a)
SHELF LIFE
Two years expectancy in tightly sealed containers. Stability of the product is limited by the permanence of the
container and the evaporation of the solvent when container is open. Evaporation of solvent will reduce the
effectiveness of the cement.
SHIPPING
Shipping Information for Individual Containers Larger than One Liter: DOT Shipping Name: Dichloro-
methane. DOT Hazard Class: 6.1. ID #: UN1593. Packaging Group: III. Label: (Domestic) Keep Away From Food
(International) Toxic.
Shipping Information for Less than One Liter: DOT Shipping Name: Consumer Commodity. DOT Shipping
Class: ORM-D.
SAFETY AND ENVIRONMENTAL PRECAUTIONS
This product is a non-flammable, very fast evaporating solvent cement. It is considered a hazardous material. In
conformance with the Federal Hazardous Substance Labeling Act, the following hazards and precautions are
given. Purchasers who may re-package this product must also conform to all local, state, and federal labeling,
safety and other regulations.
DANGER! 鈥? VAPOR HARMFUL 鈥? MAY BE HARMFUL IF SWALLOWED 鈥? MAY IRRITATE SKIN OR EYES
Keep out of the reach of children. Do not take internally. Keep away from heat, spark, open flame and other
sources of ignition. Contact with hot surfaces may produce toxic effects. Keep container closed when not in use.
Store in the shade below 80潞F. Use only in adequate ventilation. Avoid breathing of vapors. Atmospheric levels
should be maintained below established exposure limit values. See Sections II and VIII of MSDS. If airborne
concentrations exceed these limits, use a supplied air respirator. Do not use a chemical cartridge respirator. For
emergencies and other conditions where short-term exposure may be exceeded, use an approved positive
pressure self-contained breathing apparatus. In confined areas, use a positive pressure self-contained breathing
apparatus (SCBA). Do not smoke, eat or drink while working with this product. Avoid contact with skin, eyes, and
clothing. May cause eye injury. Protective equipment such as gloves, safety goggles, and impervious apron
should be used. Carefully read Material Safety Data Sheet and follow all precautions. Contains Methylene
Chloride (75-09-2), Trichloroethylene (79-01-6) and Methyl Methacrylate Monomer (80-62-6). Methylene Chloride
and Trichloroethylene are listed as cancer causing materials. OSHA has established special requirements for work
place monitoring and protection. Extent of health risk depends on level and duration of exposure, as well as
individual sensitivity. Do not use this product for other than intended use.
"Proposition 65 Warning": This product contains chemicals known to the State of California to cause cancer.
鈥淭itle III Section 313 Supplier Notification": This product contains toxic chemicals subject to the reporting
requirements of Section 313 of the Emergency Planning and Community Right-To-Know Act of 1986 and of
40CFR372. This information must be included in all MSDS鈥檚 that are copied and distributed for this material.
FIRST AID
Inhalation: If ill effects from inhalation, remove to fresh air. If not breathing, give artificial respiration. If breathing is
difficult, give oxygen. Call physician.
Eye or Skin Contact: Flush with plenty of water for 15 minutes. If irritation persists, get medical attention.
Ingestion: If swallowed, do not induce vomiting. Contact physician immediately.
QUALITY ASSURANCE
Every batch of this cement is checked to assure that consistent quality is maintained. An infrared absorption curve
is recorded for each batch to ensure that this cement is properly formulated. Samples are taken from all batches
and kept for a period of at least one year. A batch identification code is stamped on each can.
IMPORTANT NOTICE
This product is intended for use by skilled individuals at their own risk. These suggestions and data are based on
information we believe to be reliable. Users should verify by test that this product, as well as these methods, are
suited to their application. Our warranty is limited to the replacement of defective IPS products.
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