3M VHB Tape 4945 Datasheet 3M VHB Tape 4945

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  • Description for 3M VHB Tape 4945

    • Double sided foam tape • White color • Interior bonding applications • Exterior bonding applications • Excellent solvent resistance • High tensile strength • High shear adhesion • Outstanding durability

    *See Terms of Use Below

    Brand VHB
    Chemical Resistance Kerosene resistance, Chemical Resistance: Excellent solvent resistance, Chemical Resistance: Fluid Resistance: Salt water resistance, Chemical Resistance: Resistance to plasticizer migration, Hydraulic fluid resistance, Chemical Resistance: MEK resistance, 10W30 motor oil resistance, Chemical Resistance: Isopropyl alcohol resistance, Glycol antifreeze resistance, Gasoline resistance, Jet fuel resistance
    Application Type Bond
    1 Part or 2 Part 1-Part
    Material Form Tape: Foam tape
    Substrate Acrylic paint, Aluminum, Polycarbonate, Polyester paint, Polyurethane paint, Unplasticized PVC, Enameled Steel, Stainless Steel, Polyamide, Phenolic, Many vinyl formulations, Galvanized Steel, ABS
    Industry Ideal for use in many interior bonding applications
    Manufacturer 3M
    Chemistry Acrylic adhesive
    Cure Method Pressure sensitive
    Application Temperature (°F) 59
    Color White
    Total Thickness (mm) 1.029 to 1.257
    Double Sided Double sided
    Adhesive Thickness (Liner Side) - Double Sided Tapes (mm) 0.076
    Static Shear (Time to Fail) (min) 1500, 500, 500
    Static Shear Substrate Stainless steel, Stainless steel, Stainless steel
    Static Shear Test Method Approximately, ASTM D3654, Tested at various temperatures and gram loadings. 0.5in2 (3.23 cm2). Will hold listed weight for 10,000 minutes.; The following technical information and data should be considered representative or typical only and should not be used for specification purposes., Approximately, ASTM D3654, Tested at various temperatures and gram loadings. 0.5in2 (3.23 cm2). Will hold listed weight for 10,000 minutes.; The following technical information and data should be considered representative or typical only and should not be used for specification purposes., Approximately, ASTM D3654, Tested at various temperatures and gram loadings. 0.5in2 (3.23 cm2). Will hold listed weight for 10,000 minutes.; The following technical information and data should be considered representative or typical only and should not be used for specification purposes.
    Static Shear Time (min) 10,080, 10,080, 10,080
    Static Shear Temperature (°C) 22, 66, 93
    Paper Liner Type: DK Paper
    High Temperature Resistance (°C) 149, 93
    Stress Relief Stress relaxing
    Durability Outstanding
    Conformable Conformability
    Density (g/cm³) 0.800
    Key Specifications UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association): UL746C recognition
    Tape Backing/Carrier Acrylic foam backing
  • Technical Data for 3M VHB Tape 4945

    Overview
    • Chemical Resistance
      • Chemical Resistance : Fluid Resistance : Water Resistance - Salt water resistance
      • Chemical Resistance - Kerosene resistance, Hydraulic fluid resistance, 10W30 motor oil resistance, Glycol antifreeze resistance, Gasoline resistance, Jet fuel resistance
      • Chemical Resistance : Relative Solvent Resistance - Excellent solvent resistance, Isopropyl alcohol resistance, MEK resistance
      • Chemical Resistance : Plasticizer Resistance - Resistance to plasticizer migration
    • Application Type
    • 1 Part or 2 Part
      • 1-Part
    • Material Form
      • Tape : Foam Tape
    • Substrate
    • Industry
      • Interior - Ideal for use in many interior bonding applications
      • Other - Ideal for use in many exterior bonding applications, Multi Purpose
    • Chemistry
    • Cure Method
      • Pressure Sensitive (min) - Pressure sensitive
    • Color
      • White
    • Key Specifications
      • UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association) : 746 - UL746C recognition
    • Brand
      • VHB
    • Tape Backing/Carrier
      • Acrylic Foam - Acrylic foam backing
    Specifications
    Cure Specs
    Application Temperature (°F) 59
    Bond Strength
    Peel Strength (piw) High, 25 (lb/in) Test Method
    Shear Strength (psi) High, 80 (lb/in2) Test Method
    Tensile Strength (psi) High, 140 (lb/in2) Test Method
    Tape Properties
    Total Thickness (mm) 1.029 to 1.257
    Double Sided Double sided
    Adhesive Thickness (Liner Side) - Double Sided Tapes (mm) 0.076
    Static Shear (Time to Fail) (min) 1500, 500, 500
    Static Shear Substrate Stainless steel, Stainless steel, Stainless steel
    Static Shear Test Method Approximately, ASTM D3654, Tested at various temperatures and gram loadings. 0.5in2 (3.23 cm2). Will hold listed weight for 10,000 minutes.; The following technical information and data should be considered representative or typical only and should not be used for specification purposes., Approximately, ASTM D3654, Tested at various temperatures and gram loadings. 0.5in2 (3.23 cm2). Will hold listed weight for 10,000 minutes.; The following technical information and data should be considered representative or typical only and should not be used for specification purposes., Approximately, ASTM D3654, Tested at various temperatures and gram loadings. 0.5in2 (3.23 cm2). Will hold listed weight for 10,000 minutes.; The following technical information and data should be considered representative or typical only and should not be used for specification purposes.
    Static Shear Time (min) 10,080, 10,080, 10,080
    Static Shear Temperature (°C) 22, 66, 93
    Material Resistance
    High Temperature Resistance (°C) 149, 93 Test Method
    Moisture/Humidity Resistance Excellent moisture resistance
    Hardness
    Stress Relief Stress relaxing
    Durability Outstanding
    Conformable Conformability
    Elasticity Viscoelastic
    Flexibility Firm backing
    Other Properties
    Outgassing 1.24 (%TML), 0.01 (%VCM), 0.19 (%WVR)
    Density (g/cm³) 0.800 Test Method
    Business Information
    Shelf Life Details All 3M™ VHB™ Tapes have a shelf life of 24 months from date of manufacture when stored at 40°F to 100°F (4°C to 38°C) and 0-95% relative humidity. The optimum storage conditions are 72°F (22°C) and 50% relative humidity. All 3M™ VHB™ Tapes have a shelf life of 24 months from date of manufacture when stored at 40°F to 100°F (4°C to 38°C) and 0-95% relative humidity. The optimum storage conditions are 72°F (22°C) and 50% relative humidity.
    Shelf Life Temperature (°F) 39 to 100
    Shelf Life Type From date of manufacture
    Shelf Life (mon) 24
  • Best Practices for 3M VHB Tape 4945

    *See Terms of Use Below

    1. Surface Preparation

      Clean: Most substrates are best prepared by cleaning with a 50:50 mixture of isopropyl alcohol (IPA*) and water prior to applying 3M™ VHB™ Tapes.

      Exceptions to the general procedure that may require additional surface preparation include: Heavy Oils: A degreaser or solvent-based cleaner may be required to remove heavy oil or grease from a surface and should be followed by cleaning with IPA/water.

      Abrasion: Abrading a surface, followed by cleaning with IPA/water, can remove heavy dirt or oxidation and can increase surface area to improve adhesion. Abrasion is not suggested with 3M™ VHB™ Tapes 4932 and 4952.

      Adhesion Promoters: Priming a surface can significantly improve initial and ultimate adhesion to many materials such as plastics and paints.

      Porous surfaces: Most porous and fibered materials such as wood, particleboard, concrete, etc. need to be sealed to provide a unified surface.

      Unique Materials: Special surface preparation may be needed for glass and glass-like materials, copper and copper containing metals, and plastics or rubber that contain components that migrate (e.g. plasticizers).

      Refer to 3M Technical Bulletin “Surface Preparation for 3M™ VHB™ Tape Applications” for additional details and suggestions.

      To obtain good performance with all 3M™ VHB™ Tapes, it is important to ensure that the surfaces are dry and free of condensed moisture.

    2. Application

      Time: After application, the bond strength will increase as the adhesive flows onto the surface (also referred to as “wet out”). At room temperature approximately 50% of ultimate bond strength will be achieved after 20 minutes, 90% after 24 hours and 100% after 72 hours. This flow is faster at higher temperatures and slower at lower temperatures. Ultimate bond strength can be achieved more quickly (and in some cases bond strength can be increased) by exposure of the bond to elevated temperatures (e.g. 150°F [66°C] for 1 hour). This can provide better adhesive wet out onto the substrates. Abrasion of the surfaces or the use of primers/adhesion promoters can also have the effect of increasing bond strength and achieving ultimate bond strength more quickly.

      Pressure: Bond strength is dependent upon the amount of adhesive -to surface contact developed. Firm application pressure develops better adhesive contact and helps improve bond strength. Typically, good surface contact can be attained by applying enough pressure to insure that the tape experiences approximately 15 psi (100 kPa) pressure. Either roller or platen pressure can be used. Note that rigid surfaces may require 2 or 3 times that much pressure to make the tape experience 15 psi.

      Note: Initial tape application to surfaces at temperatures below these suggested minimums is not recommended because the adhesive becomes too firm to adhere readily. However, once properly applied, low temperature holding is generally satisfactory.

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    *See Terms of Use Below

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Peel Strength Test Methods
Peel Strength Cure Time Cure Temperature Substrate Test Method
High
25 (lb/in) 4,320 min 20 to 25°C Room temperature Stainless steel 90° Peel Adhesion -Based on ASTM D3330, Jaw speed 12 in/min (304.8 mm/min). Average force to remove is measured., The following technical information and data should be considered representative or typical only and should not be used for specification purposes.
Tensile Strength Test Methods
Tensile Strength Type Cure Time Cure Temperature Substrate Test Method
High
140 (lb/in2) Normal Tensile (T-BlockTensile) 4,320 min 20 to 25°C Room temperature Aluminum ASTM D-897,1 in2 (6.45 cm2 ), jaw speed 2 in/min (50.8 mm/min) Peak force to separate is measured.; The following technical information and data should be considered representative or typical only and should not be used for specification purposes.
Shear Strength Test Methods
Shear Strength Type Cure Time Cure Temperature Substrate Test Method
High
80 (lb/in2) Dynamic overlap shear 4,320 min 20 to 25°C Room temperature Stainless steel ASTM D-1002, Jaw speed 0.5 in/min (12.7 mm/min)Peak force to separate is measured.; The following technical information and data should be considered representative or typical only and should not be used for specification purposes.
High Temperature Resistance Test Methods
High Temperature Resistance Test Method
149°C Short Term Temperature Tolerance - No change in room temperature dynamic shear properties following 4 hours conditioning at indicated temperature with 100 g/static load. (Represents minutes, hours in a process type temperature exposure).; The following technical information and data should be considered representative or typical only and should not be used for specification purposes.
93°C Long Term Temperature Tolerance - Maximum temperature where tape supports at least 250 g load per 0.5 in2 in static shear for 10,000 minutes. (Represents continuous exposure for days or weeks).; The following technical information and data should be considered representative or typical only and should not be used for specification purposes.
Density Test Methods
Density Test Method
0.800 g/cm³ The following technical information and data should be considered representative or typical only and should not be used for specification purposes.