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).
WELD-ON® 4™ 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.
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 sub-assemblies using the capillary method.
Since our shipper charges a hazardous materials handling fee of $27.50 for chemicals greater than 1 Liter in volume per shipment, that amount has been reflected in the price of the item.
Important Shipping Restrictions:
Shipping class: Non ORM-D Hazardous Materials
AVAILABLE SHIPPING SERVICE: FedEx Ground ONLY*
This item is a shipping hazard and can only ship via ground delivery within the United States (except Alaska and Hawaii).
INSTRUCTIONS FOR CHOOSING A SHIPPING OPTION AT CHECKOUT: *When selecting a shipping service at checkout, please select ground or home delivery shipping. At checkout please do not choose express saver, 2 day air, standard overnight, priority, or first overnight because we are unable to ship the Weld-On via Air due to federal regulations. We reserve the right to change shipping to ground or home delivery (if it is a residential address) if an "air" shipping method is chosen.