Description: Weld-On 4SC 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 4SC may be preferred by some plastic fabricators because it is less likely to leave white marks (commonly called blushing).Substrate RecommendationsWeld-On 4SC 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 RecommendationsWeld-On 4SC 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 4SC 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).Directions for UseGeneral: 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.Shelf LifeTwo 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.
Price: 12.61 USD
Location: West Nyack, New York
End Time: 2024-09-04T14:54:24.000Z
Shipping Cost: N/A USD
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All returns accepted: ReturnsNotAccepted
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Brand: weld-on
MPN: 13418
Country/Region of Manufacture: United States
