SCIGRIP IPS Weld-On #4 (DCM & TCE Free Formula) – Blush-Resistant Solvent Cement for Acrylics
- Weight:
- 0.00 LBS
Description
Weld-On® 4 (DCM & TCE Free) is a water-thin, flammable solvent cement formulated to quickly develop very clear and high-strength bonds for many thermoplastic substrates. The bond is achieved by softening the surfaces to be joined and fusing them together as the solvent dissipates. Initial bonds form within minutes, followed by a significant increase in strength over the next several hours. Many fabricators prefer Weld-On 4 because it is less likely to leave white marks (commonly called blushing). For similar applications requiring a faster set time, Weld-On 3 (DCM & TCE Free) is recommended.
Substrate Recommendations
Weld-On 4 (DCM & TCE Free) is formulated as a blush-resistant cement for bonding acrylic (polymethylmethacrylate) to itself. It is not recommended for crosslinked acrylic.
Bonding Recommendations
Extensively used in sign fabrication for cementing acrylic letters to flat presentation panels and trim-capping cut acrylic letters. Strong butt joints are made with the soak method, while the capillary method is ideal for display cases, medical equipment, plastic containers, and other solvent-welded acrylic structures.
Additional Information
This product is not for general consumer use. It is intended for industrial and professional use only. Plastic-Craft Products reserves the right to substitute Weld-On 4SC for Weld-On 3 or Weld-On 4 when ordered by individual consumers.
Note: This product may not be shipped into Los Angeles, San Bernardino, Orange, or Riverside Counties. Orders placed for delivery to these counties may be substituted with Weld-On 4SC.
Technical
Typical Bond Strength†
| Substrate Material | Aged Bond Strength, lbs/in2 (kg/cm2) | ||
| 2 Hours | 24 Hours | 1 Week | |
| Acrylic (Cast & Extruded) | 1,001 (70.4) | 2,429 (170.8) | 2,604 (183.1) |
† Substrate thickness: 0.25 in (0.64 cm). Bond area: 1.0 in² (6.45 cm²). Strength defined after 24-hour room temperature cure.
Adhesive Properties and Characteristics @ 73°F (23°C)
| Color | Clear |
| Viscosity | Water Thin |
| Working Time | 1–2 Minutes |
| Fixture Time | 3 Minutes |
| Time to 65–80% Bond Strength | 24 Hours |
| Specific Gravity | 1.164 ± 0.01 |
Directions
General Use: Surfaces must be clean, dry, and fit without forcing. Apply cement with syringe, eyedropper, or brush. Assemble while surfaces are still wet. Initial bonds form very quickly, with 90–95% of ultimate strength reached 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. By capillary action, the cement flows ~0.25 in (0.64 cm). Allow surfaces to soften, then press firmly.
Soak Method: Vertically dip surfaces until softened (approx. 2–5 minutes), then join firmly.
- Ultimate bond strength develops slightly slower than Weld-On 3 but is comparable.
- If crazing is a concern, consider annealing before bonding.
Shelf Life: Two years in tightly sealed containers. Avoid thinning, as it alters cement properties.
Safety
Safety and Environmental Precautions
This product is a flammable, fast-evaporating solvent cement. Classified as hazardous: Highly flammable liquid and vapor. Harmful if inhaled. May cause an allergic skin reaction. Suspected of causing cancer.
Use with adequate ventilation. Avoid contact with skin, eyes, and clothing. Keep away from heat, sparks, and flame. Store below 80°F (27°C). Protective equipment such as gloves, goggles, and impervious apron should be worn.
First Aid:
Inhalation: Remove to fresh air, provide oxygen if needed, call physician.
Eye Contact: Flush with water for 15 minutes, call physician.
Skin Contact: Wash with soap and water for 15 minutes, seek medical help if irritation develops.
Ingestion: Do not induce vomiting. Drink 1–2 glasses of water or milk. Contact physician immediately.