PRODUCT BULLETIN



                                                                                                                                                  4

                                                                                                                                                         TM





                        IPS CORPORATION                                                                                    ACRYLIC PLASTIC CEMENT





SUBSTRATE RECOMMENDATIONS:

WELD-ON?4TM is formulated as a blush-resistant cement for bonding acrylic (poly-methyl methacrylate) to itself. It will also form

strong bonds with other thermoplastics such as polystyrene, CAB (cellulose acetate butyrate), and polycarbonate to themselves. It

is not recommended for cross-linked acrylic.



BONDING RECOMMENDATIONS:

WELD-ON 4 is used extensively in sign fabrication for cementing acrylic letters to flat acrylic presentation panels and trim-capping

of cut out acrylic letters. Strong butt joints are made with flat sheets by using the soak method. WELD-ON 4 is also widely used in

many applications e.g. fabrication of display and presentation cases, medical equipment assembly, the bonding of plastic containers

and pre-forms, and in the manufacture of numerous solvent welded structures and subassemblies using the capillary method.



GENERAL DESCRIPTION:

WELD-ON 4 is a water-thin, somewhat flammable cement formulated to quickly develop very clear and high strength bonds for

many thermoplastic substrates. The bond is achieved by first softening the surfaces to be joined and then fusing them together

with the dissipation of the solvent. The initial bond forms within a matter of minutes and is followed by a significant and continual

increase in bond strength over the next several hours. WELD-ON 4 may be preferred by some plastic fabricators because it

is less likely to leave white marks (commonly called blushing). For similar applications but faster setting cement, WELD-ON?3TM*

is recommended.

*WELD-ON 3 is not available for use in areas regulated by California's South Coast Air Quality Management District (SCAQMD).



TYPICAL BOND STRENGTH :

                                                                      Aged Bond Strength, lbs/in2 (kg/cm2)

          SUBSTRATE MATERIAL

                                                             2 Hours                     24 Hours                     1 Week

          Acrylic (Cast & Extruded)                         800 (56.3)                 2000 (140.6)                2500 (175.8)

          Polycarbonate                                     750 (52.7)                 1600 (112.5)                2400 (168.7)

          Polystyrene                                       400 (28.1)                  1300 ( 91.4)               2000 (140.6)

                                                                  Substrate thickness: 0.25 inch (0.64 cm). Bond area: 1.0 in2 (6.45 cm2)

                                                               







ADHESIVE PROPERTIES AND CHARACTERISTICS:

COLOR:                                       Clear

VISCOSITY:                                   Water Thin

TIME TO REACH 80% OF

ULTIMATE BOND STRENGTH:                      72 hours

SPECIFIC GRAVITY:                            1.12 ?0.04

DIRECTIONS FOR USE:

   GENERAL ?Surfaces to be joined must be clean, dry, and fit intimately 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. Initial bonds form very

   quickly. 65 ?80% of the ultimate bond strength will be obtained within 24 ?72 hours. Strength will continue to increase for

   several weeks.

   CAPILLARY METHOD ?Parts are placed lightly together and cement is applied to the edge of the joint with syringe or

   eyedropper. By capillary action, the cement will flow a considerable distance (approximately 0.25 inch (0.64 cm) between two

   such surfaces. Allow a few seconds for the cement to soften the surfaces. Press parts firmly together.

   SOAK METHOD ?Vertically dip surfaces until softened (approximately 2 to 5 minutes), then join pieces firmly together.

   Although development of WELD-ON 4 bond strength is slightly slower than that of WELD-ON 3, ultimate bond strength will be

   the same. If crazing is a problem, we suggest you consider annealing before cementing.

AVAILABILITY:

This product is available in 4 oz. (118 ml), pint (473 ml), quart (946 ml) and gallon (3.785 l) metal cans. For detailed information

on containers and applicators, refer to the current Product Catalog and Price List.



SHELF LIFE:

2 years in tightly sealed containers. The date code of manufacture is stamped on the bottom of the container. Stability of the product

is limited by the evaporation of the solvent when the container is opened. Evaporation of solvent will cause the cement to thicken

and reduce its effectiveness. Adding of thinners to change viscosity is not recommended and may significantly change the properties

of the cement.









Copyright ?2008 by IPS Corporation                                                                                                          4-04-2008

QUALITY ASSURANCE:

WELD-ON 4 is carefully evaluated to assure that consistent high quality is maintained. Fourier transform infrared spectroscopy,

gas chromatography, and additional in depth testing ensures each batch is manufactured to exacting standards. A batch identification code is

stamped on each can and assures traceability of all materials and processes encountered in manufacturing this plastic cement for its intended

specific application.

SHIPPING:

For One Liter and Above                                                 For Less than One Liter

Proper Shipping Name: Flammable liquid, toxic n.o.s                     Proper Shipping Name: Consumer Commodity

                       (Methyl Acetate, Dichloromethane)

Hazard Class:          3 with subsidiary risk 6.1                       Hazard Class: ORM-D

Identification Number: UN 1992

Packing Group:         II

Label Required:        Flammable Liquid & Toxic

SAFETY AND ENVIRONMENTAL PRECAUTIONS:

This product is a flammable, moderately 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. VOC emissions do not exceed 250 grams per liter.

                                      DANGER! FLAMMABLE. VAPOR HARMFUL.

                             MAY BE HARMFUL IF SWALLOWED. 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 80ºF (27ºC). 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), Methyl Acetate (79-20-9) and Methyl Methacrylate Monomer (80-62-6). Methylene Chloride is

considered a cancer causing material. 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.

"Title 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's that are

copied and distributed for this material.

FIRST AID:

Inhalation:         If overcome with vapors, remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult,

                    give oxygen. Call physician.

Eye Contact:        Flush with plenty of water for 15 minutes and call a physician.

Skin Contact:       Wash skin with plenty of soap and water for at least 15 minutes. If irritation develops, get medical attention.

Ingestion:          If swallowed, give 1 or 2 glasses of water or milk. Do not induce vomiting. Contact physician or poison control

                    center immediately.

IMPORTANT NOTE:

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, is suited to their application.



WARRANTY:

IPS?Corporation ("IPS Corp.") warrants that all new IPS Corp. products shall be of good quality and free from defects in material and

workmanship for the shelf life as indicated on the product. If any IPS Corp. product becomes defective, or fails to conform to our written limited

warranty under normal use and storage conditions, then IPS Corp. will, without charge, replace the nonconforming product. However, this

limited warranty shall not extend to, nor shall IPS Corp. be responsible for, damages or loss resulting from accident, misuse, negligent use,

improper application, or incorporation of IPS Corp. products into other products. In addition, any repackaging of IPS Corp. products also shall

void the limited warranty. IPS Corp. shall not be responsible for, nor does this limited warranty extend to, consequential damage, or incidental

damage or expense, including without limitation, injury to persons or property or loss of use. Please refer to our standard IPS Corp. Limited

Warranty for additional provisions.





                                                           455 W. Victoria Street                500 Distribution Parkway

                                                           Compton, CA 90220 U.S.A.              Collierville, TN 38017 U.S.A.

                                                           Tel: 310.898.3300                     Tel: 901.853.5001

                                                           Fax: 310.898.3392                     Fax: 901.853.5008



                                                           Customer Service: 800.888.8312

                                                           www.ipscorp.com