Application Type Bond 1 Part or 2 Part 1 Part Material Form Stick Substrate Fabric, Foam, Porous, Plastic, CardBoard, PlyWood, Wood Industry Food Manufacturer Bostik Chemistry Hot melt Cure Method Hot melt Cure Time (min) 1,440 Viscosity (cPs) 1,900 Color Light Tan Chemical Resistance Acids & Alkalies, Chemical resistance, Fats & oils, Water High Temperature Resistance (°C) 71 Low Temperature Resistance (°C) -29 Key Specifications FDA (U.S. Food & Drug Administration) and/or CFIA (Canadian Food Inspection Agency): FDA 21 CFR 175.105
Technical Data for Bostik Thermogrip 2391
- Adhesive - Bond
1 Part or 2 Part
- 1 Part or 2 Part - 1 Part
- Hotmelt - Hot melt
- Brown - Light Tan
- FDA (U.S. Food & Drug Administration) and/or CFIA (Canadian Food Inspection Agency): 175.105 - FDA 21 CFR 175.105
Cure Time (min) 1,440 Viscosity (cPs) 1,900 Test Method Fixture or Handling Strength Time (min) 1,440 Softening Point (°C) 95 to 99 Work / Pot Time (min) Medium Open Time (min) 0.67
Peel Strength (piw) 4.0 (lbs./linear inch) Test Method Shear Strength (psi) 300 Test Method
Chemical Resistance Acids & Alkalies, Chemical resistance, Fats & oils, Water High Temperature Resistance (°C) 71 Low Temperature Resistance (°C) -29
Specific Gravity 0.958 (gm/cc) Test Method
Shelf Life Details 999 days @ 73.4°F (23°C). Shipping and storage: Between 40°F to 95°F (4°C to 35°C) Shelf Life Temperature (°F) 73 Shelf Life (mon) 33
Best Practices for Bostik Thermogrip 2391
All surfaces should be clean and free of contaminants. If necessary, clean surfaces with solvent.
Apply the adhesive to the more difficult-to-bond surface. In general, hard, smooth surfaces are more difficult to bond than rough, porous surfaces. “Open-time” varies depending on application temperature, amount of adhesive applied, type of substrate and ambient temperature conditions. Mate the surfaces to be bonded as quickly as possible after adhesive has been applied for optimum bond strength. Use firmest pressure practical for object being bonded. Do not move or adjust surfaces after contact has been made, as inferior bond strength will result. Typically, a properly formed hot melt adhesive bond will achieve 50% of its strength after 1 minute, 75% after 1 hour, and 100% after 1 day.
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Viscosity Test Methods
Shear Strength Test Methods
Peel Strength Test Methods
|4.0 (lbs./linear inch)||Canvas|
Specific Gravity Test Methods
|Specific Gravity||Test Method|
|0.958 (gm/cc)||After 24 Hour Cure|