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3M VHBT 45mil Firm White

General Information
3M 4950 is a (VHB™ ), firm acrylic foam tape that is used for bonding a variety of substrates. 4950 is one of two VHB™ go-to items. It is used over the 4941 family when firmness is preferred to conformability. The 4950 family has general purpose adhesive on both sides of a firm foam. It is typically used on glass, metal and high surface energy plastic substrates. In many instances it can replace rivets, spot welds, liquid adhesives and other permanent fasteners.
Backing Adhesive
Liner Type
Acrylic Foam Acrylic 45.00 mil Paper (3 mil, 54# densified kraft printed)
Adhesion to Steel
180° Peel
adhesion to steel 180° peel - liner side Tensile Strength Elongation Percent
400.00 oz/in 400.00 oz/in 140.00 lbs/in  
Min Application
Min Service
Max Short-Term
Max Long-Term
50 °F -40 °F 300 °F 200 °F
Adhesive Tape Features
  • Low outgassing
  • General purpose acrylic adhesive bonds to most higher surface energy substrates including metal, glass, and high surface energy plastics
  • Firm acrylic foam provides the highest level of foam strength in the 3M™ VHB™ family
  • Viscoelastic acrylic gives foam energy absorbing and stress relaxing properties
  • Acrylic chemistry provides outstanding durability and excellent solvent and moisture resistance with some moderate resistance to chemicals
  • UL Recognition 746C
Adhesive Tape Applications
  • Bonds aluminum skin to steel support in trucks, vans & ambulances
  • Mounts architectural signs to frames
  • Can replace rivets, spot welds, liquid adhesives,permanent fasteners
  • Bonding a variety of substrates, including most metals, glass and high surface energy plastics.
  • Attach stiffener in air conditioners, office furniture, and telecommunications equipment
Adhesive Tape Markets Served
  • Automotive
  • Truck and trailer body
  • Commercial printing
  • Industrial
  • Construction
  • Electronics/Electrical
Adhesive Tape Colors
  • White
Comparable products
Backing Adhesive Thickness Adhesion
 Acrylic Foam   Acrylic   45.00mil   400.00oz/in 

The physical properties listed are typical values and are not to be considered as specifications. Our suggestions for use are based on tests we believe to be reliable. However, the purchaser must carry out their own tests to determine the suitability of the product for their internal use. Information is given in good faith, but without warranty.

It is essential, as with all pressure-sensitive tapes, that the surface to which the tape is applied be clean, dry and free of grease and oil.

Shelf life from date of manufacture is based on the product being stored at 70°F(21°C) / 50% relative humidity out of direct sunlight.

Specification compliance is dynamic and should only be used as a general guide. Always confirm that the tape you are interested in currently complies with all specification requirements. Please verify that the product number that you select is available in the proper size and color to meet your specification.

Choose the surface energy of the exact surface that the adhesive will contact (e.g. if the part was painted metal, paint would be the surface energy).