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SciGrip 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. SciGrip 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). Download Weld-On 4 MSDS Sheet [PDF] How to use: GENERAL:
- Adjoining surfaces must be clean, dry, and properly fit
- Apply cement with syringe, eyedropper or brush
- Assemble while parts are still wet. If cement is applied to one surface, gently place the two materials together for a few seconds, and then press parts together firmly. Initial bonds form very quickly. 65
80% of the ultimate bond strength will be obtained within 24 hours. Strength will continue to increase for several weeks. CAPILLARY METHOD:
- Place parts together and apply cement 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 and press parts firmly together. SOAK METHOD:
- Vertically dip surfaces in the cement until softened (approximately 2 to 5 minutes)
- Join pieces firmly together Note: Although development of SciGrip Weld-On 4 bond strength is slightly slower than that of SciGrip 3, ultimate bond strength will be the same. In many cases, this cement dries too fast to apply by brush to the parts before they are joined. If crazing is a problem, we suggest you consider annealing before cementing.
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