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Description for 3M VHB Tape 4949
• Double sided foam tape • Black • Interior bonding applications • Exterior bonding applications • Excellent solvent resistance • High tensile adhesion • Outstanding durability • Excellent moisture resistance • Resistance to plasticizer migration.Brand VHB Chemical Resistance Chemical Resistance: Excellent solvent resistance, Chemical Resistance: Resistance to plasticizer migration, Hydraulic fluid resistance, Chemical Resistance: Fluid Resistance: Salt water resistance, 10W30 Motor oil resistance, Glycol antifreeze resistance, Kerosene resistance, Isopropyl alcohol resistance, Jet Fuel resistance, Gasoline resistance, MEK resistance Application Type Bond Material Form Tape: Foam tape Substrate Aluminum, Ceramic, Epoxy, PBT, Glass, Metal, ABS, High surface energy plastic substrates, Polycarbonate, Rigid PVC, Enameled Steel, Galvanized Steel, Stainless Steel, Acrylic, Steel Industry Use in many interior bonding applications, General Purpose Manufacturer 3M Chemistry Acrylic Cure Method Pressure sensitive Application Temperature (°F) >50 Color Black Total Thickness (mm) 1.029 to 1.257 Double Sided Double sided Adhesive Thickness (Liner Side) - Double Sided Tapes (mm) 0.051 Static Shear Temperature (°C) 22, 66, 93 Static Shear Substrate Stainless steel, Stainless steel, Stainless steel Static Shear Time (min) 10,080, 10,080, 10,080 Static Shear Strength (min) 1500, 500, 500 Polyester (PET) Liner Type: Polyester High Temperature Resistance (°C) 93, 149 Stress Relief Stress relaxing Durability Outstanding Density (g/cm³) 0.800 Key Specifications UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association): UL 746C recognition Tape Backing/Carrier Acrylic foam backing -
Technical Data for 3M VHB Tape 4949
Overview
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Chemical Resistance
- Chemical Resistance : Fluid Resistance : Water Resistance - Salt water resistance
- Chemical Resistance - MEK resistance, Hydraulic fluid resistance, 10W30 Motor oil resistance, Glycol antifreeze resistance, Kerosene resistance, Isopropyl alcohol resistance, Jet Fuel resistance, Gasoline resistance
- Chemical Resistance : Relative Solvent Resistance - Excellent solvent resistance
- Chemical Resistance : Plasticizer Resistance - Resistance to plasticizer migration
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Application Type
- Adhesive - Bond
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Material Form
- Tape : Foam Tape
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Substrate
- Ceramic
- Glass
- Metal
- Aluminum
- Steel - Enameled Steel
- Plastic - High surface energy plastic substrates
- Epoxy
- ABS
- Polycarbonate
- Polyvinyl chloride (PVC) - Rigid PVC
- Acrylic (PMMA) - Acrylic
- Polybutylene Terephthalate (PBT) - PBT
- Galvanized Steel
- Stainless Steel
- Other - Foam
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Industry
- Interior - Use in many interior bonding applications
- General Purpose
- Other - Use in many exterior bonding applications
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Chemistry
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Cure Method
- Pressure Sensitive (min) - Pressure sensitive
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Color
- Black
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Key Specifications
- UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association) : 746C - UL 746C recognition
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Brand
- VHB
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Tape Backing/Carrier
- Acrylic Foam - Acrylic foam backing
Specifications
Cure Specs
Application Temperature (°F) >50 Bond Strength
Peel Strength (piw) High, 25 (lb/in2) 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) 0.051 Static Shear Temperature (°C) 22, 66, 93 Static Shear Substrate Stainless steel, Stainless steel, Stainless steel Static Shear Time (min) 10,080, 10,080, 10,080 Static Shear Strength (min) 1500, 500, 500 Test Method Material Resistance
High Temperature Resistance (°C) 93, 149 Test Method Moisture/Humidity Resistance Excellent moisture resistance Hardness
Stress Relief Stress relaxing Durability Outstanding Elasticity Viscoelastic Flexibility Firm Other Properties
Density (g/cm³) 0.800 Test Method Business Information
Shelf Life Details All 3M™VHB™Tapeshave a shelf life of 24 months from date of manufacture when stored at 40°Fto 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.; Performance of tapes is not projected to change even after shelf life expires ;however, 3M does suggest that 3M™ VHB™ Tapes are used prior to the shelf life date whenever possible. Shelf Life Temperature (°F) 40 to 100 Shelf Life Type From date of manufacture Shelf Life (mon) 24 -
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Best Practices for 3M VHB Tape 4949
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Surface Preparation
Application Techniques: 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.
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.
These cleaner solutions contain greater than 250 g/l of volatile organic compounds (VOC).Please consult your local Air Quality Regulations to be sure the cleaner is compliant. When using solvents ,be sure to follow the manufacturer’s precautions and directions for use when handling such materials.
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Application
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 require2or3times 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.
Time: After application, the bond strength will increase as the adhesive flows on to 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 1hour).This can provide better adhesive wet out on to 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.
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Shear Strength Test Methods
Shear Strength | Type | Cure Time | Cure Temperature | Substrate | Test Method |
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High | |||||
80 (lb/in2) | Dynamic Overlap Shear | 4,320 min | -7 to -4°C Room temperature | Stainless steel | ASTM D-1002, 1 in2 (6.45 cm2), Jaw speed 0.5 in/min (12.7 mm/min)Peak force to separate is measured.; Note: The following technical information and data should be considered representative or typical only and should not be used for specification purposes. |
Peel Strength Test Methods
Peel Strength | Cure Time | Cure Temperature | Substrate | Test Method |
---|---|---|---|---|
High | ||||
25 (lb/in2) | 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, Note: 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 |
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High | |||||
140 (lb/in2) | T-Block | 4,320 min | 20 to 25°C Room temperature | Aluminum | Normal Tensile -ASTM D-897, Jaw speed 2 in/min (50.8 mm/min) Peak force to separate is measured, Note: The following technical information and data should be considered representative or typical only and should not be used for specification purposes. |
Static Shear Strength Test Methods
Static Shear Strength | Static Shear Test Method |
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1500 | Approximately, ASTM D3654, Tested at various temperatures and gram loadings. 0.5in2 (3.23 cm2).Will hold listed weight for 10,000 minutes. . Conversion: 1500 g/0.5 in2 equals 6.6 lb/in2; 500 g/0.5 in2= 2.2 lb/in2.; Note: The following technical information and data should be considered representative or typical only and should not be used for specification purposes. |
500 | Approximately, ASTM D3654, Tested at various temperatures and gram loadings. 0.5in2 (3.23 cm2).Will hold listed weight for 10,000 minutes. Conversion: 1500 g/0.5 in2 equals 6.6 lb/in2; 500 g/0.5 in2= 2.2 lb/in2.; Note: The following technical information and data should be considered representative or typical only and should not be used for specification purposes. |
500 | Approximately, ASTM D3654, Tested at various temperatures and gram loadings. 0.5in2 (3.23 cm2).Will hold listed weight for 10,000 minutes. . Conversion: 1500 g/0.5 in2 equals 6.6 lb/in2; 500 g/0.5 in2= 2.2 lb/in2.; Note: 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 |
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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). |
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). |
Density Test Methods
Density | Test Method |
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0.800 g/cm³ | Note: The following technical information and data should be considered representative or typical only and should not be used for specification purposes. |