WELD-ON 55 is formulated for bonding a wide variety of thermoplastics, including polycarbonate, butyrate,
PETG, buffed acrylic, ABS, PVC, polyurethane and foam board to themselves and one another.
WELD-ON 55 is recommended for a variety of applications in the sign assembly industry, especially butyrate trim
cap to polycarbonate in channel letter applications. It also has many uses in other plastic fabrication industries for
bonding ABS to PETG.
WELD-ON 55 is a slow curing, clear colorless, 2 component, 100% reactive polyurethane adhesive that contains
no volatile organic compounds (VOC). When mixed and applied, it polymerizes at room temperature to form high
bonds within a few hours. The adhesive has excellent resistance to discoloration by UV light and has excellent
lap shear and impact strength.
BOND STRENGTH DATA
The following bond strength data were obtained using the compressive shear strength method (ASTM D-2564).
The substrate specimens were 0.25 inches (6.35MM) thick with one square inch (645 square mm) bonded area.
The time indicated is the interval between bond assembly and the performance of the shear test.
PACKAGING AND DIRECTIONS FOR USE
´ WELD-ON 55 is packaged in a twin-syringe cartridge with 50 mil total capacity that dispenses product in a 1:1
mix ratio. The package is designed for use with the MIXPAC 50 dispensing gun. The syringe and gun employ
the supplied static mixing nozzle that mixes the product as it travels the length of the mixer from the syringe to
the tip of the nozzle. See the mixing instructions included in the adhesive package.
´ Be sure that both adhesive components are flowing freely from the cartridge before attaching the mixing
nozzle. When using the mixing nozzle for successive applications, renew the adhesive in the nozzle by
extruding and discarding a few inches of the material prior to application to the bonded assembly.
´ If the mixing nozzle is left on the cartridge for a sufficient length of time without additional use, the adhesive
may cure in the nozzle. If this happens, keep the mixing nozzle on the cartridge until you are ready to
dispense more adhesive at which time you will need to put a fresh mixing nozzle on the cartridge. Be sure to
discard the first few inches again.
The viscosity of this product will allow it to flow between the polycarbonate letter and the butyrate trim cap in
most channel letter applications. The application of a reinforcing bead is recommended.
STORAGE AND SHELF LIFE
Keep away from sources of heat, open flame, sparks, sunlight and moisture. Do not store in upper levels of non
air-conditioned warehouses. Shelf life is one year in unopened pouch under these conditions.
DOT Shipping Name: Not Regulated. DOT Hazard Class: Not Regulated. ID#: None. Packing Group: None.
May be shipped as: Consumer Commodity, ORM-D
This product is a reactive adhesive and is classified as a hazardous material. In conformance with the Federal
Hazardous Substrates Labeling Act, the following hazards and precautions need to be recognized and followed.
CAUTION! _ CONTAINS ISOCYANATE _ VAPOR HARMFUL _ MAY BE HARMFUL IF SWALLOWED _
MAY IRRITATE SKIN OR EYES AND CAUSE ALLERGIC SKIN SENSITIZATION.
Keep out of reach of children. Do not take internally. Keep away from heat, sparks, open flame and other sources
of ignition. Keep container closed when not in use. Store away from direct sunlight between 45_F and 75_F. Use
only with adequate ventilation. Avoid breathing vapors. Atmospheric vapor levels should be maintained below
established exposure limit values contained in Section II and VIII of the Material Safety Data Sheet. If airborne
concentrations exceed those limits, use a NIOSH-approved organic vapor cartridge respirator with full face-piece
for single short- term exposure. For emergency and other conditions where short-term exposure guidelines may
be exceeded, use an approved positive pressure self-contained breathing apparatus. 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 Sheets and follow all precautions. Contents are non-hazardous and not regulated. Do not use this product
for other than intended uses.
Inhalation: In case of inhalation, move 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, give 1 or 2 glasses of water or milk. Do not induce vomiting. Contact physician
This product is intended for use by skilled individuals at their own risk. Recommendations contained herein are
based on information we believe to be reliable. The properties and strength values presented above are typical
properties obtained under controlled conditions at the IPS laboratory. They are intended to be used only as a
guide for selection for end-use evaluation. The ultimate suitability for any intended application must be verified by
the end user under anticipated test conditions. Since specific use, materials and product handling are not
controlled by IPS, our warranty is limited to the replacement of defective IPS products.
If you need more information on this product please click on the following link to view the manufacturer's literature page.