Rigidize components on printed circuit boards to add stability during assembly, shipping and end use

Uniquely Versatile
3M™ Hot Melt Adhesive 3748 VO to cure to a strong, flexible bond for shock and vibration resistance that ensures a reliable and lasting bond. The thermoplastic hot melt, 100% solids adhesive provides good peel adhesion and thermal shock properties, the unequal expansion of different components, along with the heat resistance necessary in electronic and other environments. It offers excellent electrical properties which make it ideal for use on printed wiring board and other electronic bonding applications. It bonds well to challenging surfaces such as polyolefins and other plastics. In addition, this versatile and unique formula is non-corrosive to copper and other metals.

Recommended Applications

• Heavy duty electrical cords and connectors
• Electronics in plastic cases
• Circuit boards
• Woodworking
• Furniture
• Automotive
• Transportation
• Aerospace
• General industrial
• Upholstery
• Point of Purchase (PoP) display

Versatile Formula
3M™ Hot Melt Adhesive 3748 VO is self-extinguishing and has a UL 94 VO rating. In addition to its exceptional electronic applications, this adhesive formula is also useful in many general industrial bonding and sealing applications where a self-extinguishing characteristic is required. Throughout various industries, 3M™ Hot Melt Adhesives are used for potting and encapsulating where their flow and conformability allow them to fill into, or dome over, complex shapes. The shock-resistant formula protects components and wiring connections against vibration, minor impact and thermal shock.

Using 3M™ Hot Melt Adhesives uniformly distributes stress along the entire bond line. Nuts, bolts and other fasteners concentrate stress at a point which can decrease physical properties of the substrates being assembled. Uniform distribution along the bond line provides good fatigue resistance and the flexible properties of 3M™ Hot Melt Adhesive 3748 VO minimize stress from vibration or other movement. While many 3M adhesives provide a strong bond, they also add an effective seal against dirt, dust, water and other environmental conditions. Using hot melt adhesives is quicker and easier than soldering, requiring no soldering flux or associated fumes.

Adhesive can be dispensed with 3M™ Scotch-Weld™ Hot Melt Applicator PG II, 3M™ Scotch-Weld™ Hot Melt Applicator TC, or the 3M™ Scotch-Weld™ Hot Melt Applicator TC Q and EC

Hot Melt Characteristics
Low-melt adhesives/hot-glue sticks have a relatively low melting point of approximately 250 - 270° F/127 - 132° C and are a