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About Structural Adhesives
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Hot-Melt Glue Sticks
When heated, these glue sticks melt and quickly begin to harden. Use them to seal packaging and form other low- to medium-strength bonds. 3M glue sticks work only with 3M glue guns. The 8" long glue sticks require a converter (sold separately) to use with a 3M TC or LT gun.
Adhesives that take longer to harden are suited for applications that require some repositioning, because the longer open times allow for more adjustment. For high-volume applications, adhesives with a lower viscosity flow faster than other hot-melt adhesives.
3750 is FDA compliant 21 CFR 175.105 for use in food packaging.
3762 is a high-tack adhesive; it bonds quickly with light pressure.
3789 joins hard-to-bond plastics and resists fuel and oil.
LM denotes low-temperature formulations. These work well on delicate or heat-sensitive materials.
| Mfr. Model No. | For 3M Gun Model No. | Dia. | Lg. | Begins to Harden | Reaches Full Strength | Application Temp. Range, °F | Consistency | Viscosity, cP | Color | For Joining | Approx. No. of Sticks per lb. | 1 lbs. | 11 lbs. | 22 lbs. | |
3M Scotch-Weld Glue | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3738 | TC | 5/8" | 2" | 50 sec. | 24 hrs. | 350° to 385° | Thick Liquid | 2,875 | Beige | Wood | 55 | 0000000 | |||
| 3738 | TC, EC | 5/8" | 8" | 50 sec. | 24 hrs. | 350° to 385° | Thick Liquid | 2,875 | Beige | Wood | 15 | 0000000 | |||
| 3738 | II | 1" | 3" | 50 sec. | 24 hrs. | 350° to 385° | Thick Liquid | 2,875 | Beige | Wood | 12 | 00000000 | |||
| 3747 | TC | 5/8" | 2" | 45 sec. | 24 hrs. | 350° to 385° | Thick Liquid | 4,100 | Beige | Fabric, Metal, Plastic, Rubber, Wood | 55 | 0000000 | |||
| 3750 | AE II | 1/2" | 10" | 30 sec. | 24 hrs. | 350° to 385° | Thick Liquid | 1,900 | Beige | Wood | 14 | 0000000 | |||
| 3750 | AE II | 1/2" | 10" | 40 sec. | 24 hrs. | 350° to 385° | Thick Liquid | 1,900 | Clear | Wood | 14 | 0000000 | |||
| 3750LM | AE II LT | 1/2" | 12" | 25 sec. | 24 hrs. | 250° to 270° | Thick Liquid | 4,000 | Beige | Wood | 14 | 0000000 | |||
| 3762 | TC | 5/8" | 2" | 35 sec. | 24 hrs. | 350° to 385° | Thick Liquid | 1,870 | Beige | Cardboard, Wood | 55 | 0000000 | |||
| 3762 | TC, EC | 5/8" | 8" | 35 sec. | 24 hrs. | 350° to 385° | Thick Liquid | 1,870 | Beige | Cardboard, Wood | 15 | 0000000 | |||
| 3762 | II | 1" | 3" | 35 sec. | 24 hrs. | 350° to 385° | Thick Liquid | 1,870 | Beige | Cardboard, Wood | 12 | 00000000 | |||
| 3762LM | LT | 5/8" | 2" | 25 sec. | 24 hrs. | 250° to 270° | Thick Liquid | 4,000 | Amber | Cardboard, Plastic, Rubber, Wood | 55 | 0000000 | |||
| 3762LM | LT, EC | 5/8" | 8" | 25 sec. | 24 hrs. | 250° to 270° | Thick Liquid | 4,000 | Amber | Cardboard, Plastic, Rubber, Wood | 15 | 0000000 | |||
| 3789 | TC, EC | 5/8" | 8" | 50 sec. | 24 hrs. | 350° to 385° | Thick Liquid | 5,200 | Brown | Plastic, Rubber | 15 | 0000000 | |||
| 3792 | TC | 5/8" | 2" | 50 sec. | 24 hrs. | 350° to 385° | Thick Liquid | 5,000 | Clear | Fabric, Wood | 55 | 0000000 | |||
| 3792 | TC, EC | 5/8" | 8" | 50 sec. | 24 hrs. | 350° to 385° | Thick Liquid | 5,000 | Clear | Fabric, Wood | 15 | 0000000 | |||
| 3792LM | LT | 5/8" | 2" | 40 sec. | 24 hrs. | 250° to 270° | Thick Liquid | 10,500 | Clear | Fabric, Plastic, Rubber, Wood | 55 | 0000000 | |||
| 3792LM | LT, EC | 5/8" | 8" | 40 sec. | 24 hrs. | 250° to 270° | Thick Liquid | 10,500 | Clear | Fabric, Plastic, Rubber, Wood | 15 | 0000000 | |||
| Converter for 3M TC or LT Guns | 0000000 | Each | 000000 |
Flexible Hot-Melt Glue Sticks
This glue remains flexible after curing to accommodate joint movement. The 8" long glue sticks require a converter (sold separately) to use with a 3M TC or LT gun.
3764 stays flexible at low temperatures and works on hard-to-bond plastics. 3M glue sticks work only with 3M glue guns.
| Mfr. Model No. | For 3M Gun Model No. | Dia. | Lg. | Begins to Harden | Reaches Full Strength | Application Temp. Range, °F | Consistency | Viscosity, cP | Elongation | Color | Specifications Met | For Joining | Approx. No. of Sticks per lb. | 1 lbs. | 11 lbs. | |
3M Scotch-Weld Glue | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3764 | TC | 5/8" | 2" | 40 sec. | 24 hrs. | 350° to 385° | Thick Liquid | 6,000 | 450% | Clear | UL 94V2 | Plastic, Rubber | 55 | 0000000 | ||
| 3764 | TC, EC | 5/8" | 8" | 40 sec. | 24 hrs. | 350° to 385° | Thick Liquid | 6,000 | 450% | Clear | UL 94V2 | Plastic, Rubber | 15 | 0000000 | ||
| Converter for 3M TC or LT Guns | 0000000 | Each | 000000 |
3M Hot-Melt Glue Guns
Dispense 3M hot-melt adhesives with these guns. Guns include one tip; additional tips are sold separately.
Additional tips are not compatible with model AE II.
For Glue Stick | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer Model No. | Dia. | Lg. | Lg. with LT/TC Converter | For 3M Glue Stick Model No. | Wattage, W | Voltage | Temp. Setting, °F | Adhesive Output, lbs./hr. | Duty Cycle | Warm-Up Time, min. | Cord Lg., ft. | Includes | Each | |
| AE II | 1/2" | 10" | __ | 3750 | 250 | 120V AC | 400° | 4 | Continuous | 3 | 8 | 3/32" Diameter Tip | 0000000 | 000000 |
| LT | 5/8" | 2" | 8" | 3762LM, 3792LM | 150 | 120V AC | 265° | 2.6 | Continuous | 10 | 8 | 3/32" Diameter Tip | 0000000 | 000000 |
| TC | 5/8" | 2" | 8" | 3738, 3762, 3764, 3789, 3792, 3796 | 150 | 120V AC | 385° | 3.5 | Continuous | 10 | 8 | 3/32" Diameter Tip | 0000000 | 000000 |
Use L-tips to close full-overlap cartons.
T-tips dispense two lines of glue to close slotted cartons.
Tips are not compatible with model AE II or AE II LT glue guns.
Palm triggers make long-term operation more comfortable.
| For 3M Gun Model No. | Manufacturer Model No. | Each | |
| LT, TC | 62-9761-9930-7 | 0000000 | 000000 |
Convert glue guns for use with 8" long glue sticks.
For Glue Stick | |||||
|---|---|---|---|---|---|
| For 3M Gun Model No. | Manufacturer Model No. | Dia. | Lg. | Each | |
| LT, TC | 62-9275-9935-7 | 5/8" | 8" | 0000000 | 000000 |
3M Hot-Melt Glue Gun Repair Parts
| Component | For 3M Gun Model No. | Manufacturer Model No. | Temp. Setting, °F | Each | |
| Valve | EC, LT, TC | 62-9234-9930-5 | __ | 00000000 | 000000 |
| Feeder | TC | 62-9238-9930-6 | __ | 00000000 | 00000 |
| Heater/Thermostat | TC | 62-9283-9930-2 | __ | 00000000 | 00000 |
| Temperature Module | EC | 62-9680-9853-3 | 356° to 379° | 00000000 | 00000 |
| Stroke Adjuster | EC | 62-9786-9930-4 | __ | 0000000 | 00000 |
| Transport Mechanism | EC | 62-9787-9930-2 | __ | 0000000 | 000000 |
Adjustable-Temperature 3M Hot-Melt Glue Guns
With five temperature range options, these guns can dispense 3M adhesives with different melting points. Install the temperature module that matches the application temperature of your 3M glue stick. Gun has a stroke adjuster that controls the amount of adhesive dispensed per trigger squeeze. One tip is included; additional tips are sold separately.
For Glue Stick | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer Model No. | Dia. | Lg. | For 3M Glue Stick Model No. | Wattage, W | Voltage | Temp. Setting, °F | Adhesive Output, lbs./hr. | Duty Cycle | Warm-Up Time, min. | Cord Lg., ft. | Includes | Each | |
| EC | 5/8" | 8" | 3738, 3762, 3762LM, 3764, 3789, 3792, 3792LM | 350 | 120V AC | 262° to 283° 288° to 312° 356° to 379° 390° to 416° 417° to 450° | 5.5 | Continuous | 10 | 8 | 3/32" Diameter Tip, Stroke Adjuster | 0000000 | 0000000 |
Use L-tips to close full-overlap cartons.
T-tips dispense two lines of glue to close slotted cartons.
Palm Triggers for 3M Hot-Melt Glue Guns
Palm triggers make long-term operation more comfortable.
| For 3M Gun Model No. | Manufacturer Model No. | Each | |
| LT, TC | 62-9761-9930-7 | 0000000 | 000000 |
Converters for 3M Hot-Melt Glue Guns
Convert glue guns for use with 8" long glue sticks.
For Glue Stick | |||||
|---|---|---|---|---|---|
| For 3M Gun Model No. | Manufacturer Model No. | Dia. | Lg. | Each | |
| LT, TC | 62-9275-9935-7 | 5/8" | 8" | 0000000 | 000000 |
Nozzles for 3M Hot-Melt Glue Guns
Use L-tips to close full-overlap cartons.
T-tips dispense two lines of glue to close slotted cartons.
Tips are not compatible with model AE II or AE II LT glue guns.
Electric/Air-Powered 3M Hot-Melt Glue Guns
For use in high-volume production applications, these guns use electric heat to melt the adhesive and compressed air to keep it flowing. Load up to three glue sticks at once. The gun includes one tip; additional tips are sold separately. Use only with 3M glue sticks.
For Glue Stick | Air Inlet | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer Model No. | Dia. | Lg. | For 3M Glue Stick Model No. | Wattage, W | Voltage | Temp. Setting, °F | Adhesive Output, lbs./hr. | Duty Cycle | Warm-Up Time, min. | Operating Air Pressure, psi | Pipe Size | Thread Type | Gender | Air Hose Lg., ft. | Cord Lg., ft. | Each | |
| II | 1" | 3" | 3738, 3762 | 500 | 120V AC | 385° | 7.5 | Continuous | 15 | 50-80 | 1/8 | NPT | Male | 8 | 8 | 00000000 | 000000000 |
Use L-tips to close full-overlap cartons.
T-tips dispense two lines of glue to close slotted cartons.
Hot-Melt Potting Compounds
Encase electronic assemblies in a layer of material for protection from dust, moisture, chemicals, mechanical shock, and vibration. Hot-melt potting compounds have excellent flexibility, good chemical and moisture resistance, and withstand a range of temperatures. They provide good electrical insulation. Use 3M glue guns (sold separately) to dispense.
8" long sticks require a converter (sold separately) for use with the TC gun.
Dry Time | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mfr. Model No. | For 3M Gun Model No. | Approx. No. of Sticks per Pound | Wt., lbs. | Dia. | Touch, sec. | O'all, hrs. | Dielectric Strength, V/mil | Thermal Conductivity, W/m-K | Max. Temp., °F | Melting Temp., °F | Specifications Met | For Use On | Color | Pkg. | |
3M Compounds—Thick Liquid | |||||||||||||||
2" Long Polyamide Sticks | |||||||||||||||
| 3779 | TC | 55 | 11 | 5/8" | 25 | 24 | 650 | 0.197 | 300° | 325° | __ | Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Plastic | Amber | 0000000 | 0000000 |
2" Long Polypropylene Sticks | |||||||||||||||
| 3748 | TC | 55 | 1 | 5/8" | 45 | 24 | 1,300 | 0.175 | 175° | 290° | UL Listed | Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Plastic | Off-White | 0000000 | 00000 |
| 3748 | TC | 55 | 11 | 5/8" | 45 | 24 | 1,300 | 0.175 | 175° | 290° | UL Listed | Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Plastic | Off-White | 0000000 | 000000 |
8" Long Polyamide Sticks | |||||||||||||||
| 3779 | EC, TC | 15 | 11 | 5/8" | 25 | 24 | 650 | 0.197 | 300° | 325° | __ | Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Plastic | Amber | 0000000 | 000000 |
8" Long Polypropylene Sticks | |||||||||||||||
| 3748 | EC, TC | 15 | 1 | 5/8" | 45 | 24 | 1,300 | 0.175 | 175° | 290° | UL Listed | Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Plastic | Off-White | 00000000 | 00000 |
| 3748 | EC, TC | 15 | 11 | 5/8" | 45 | 24 | 1,300 | 0.175 | 175° | 290° | UL Listed | Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Plastic | Off-White | 0000000 | 000000 |