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3M VHB 45mil Gray Conformable - Paper Liner

General Information
3M 4941 is a 45 mil, VHB™, double-coated adhesive foam. It is one of two 3M VHB™ core go-to items. 4941 is the main product when conformability is necessary. 3M's other go-to item when internal strength is more important than conformability is 4950. The 4941 family utilizes multi-purpose acrylic adhesive on both sides of a conformable foam. It has excellent adhesion to a broad range of high and medium surface energy substrates including metals, glass and a wide variety of plastics and plasticized vinyl. In many cases 4941 can replace rivets, spot welds, liquid adhesives or other permanent fasteners. This product is available with a Poly liner as 4941F.
Backing Adhesive
Liner Type
Acrylic Foam Acrylic 45.00 mil Paper ( 3 mil white printed)
Adhesion to Steel
180° Peel
adhesion to steel 180° peel - liner side Tensile Strength Elongation Percent
320.00 oz/in 320.00 oz/in 85.00 lbs/in  
Min Application
Min Service
Max Short-Term
Max Long-Term
60 °F -31 °F 200 °F 300 °F
Adhesive Tape Features
  • Multipurpose medium density foam offers an economical alternative to caulks and sealants
  • Acrylic adhesive bonds to a wide range of materials including metals, glass, and high and medium surface energy plastics and paints
  • Unique adhesive has the ability to resist migration of plasticizers in vinyl substrates
  • Viscoelastic acrylic gives foam energy absorbing and stress relaxing properties
  • Conformable foam provides high strength with the capability of conforming to the irregularities of rigid substrates even when there is a slight mismatch
  • Resistant to moisture, plasticizers, solvents, UV light, and mild exposure to chemicals
  • UL Recognition 746C
  • Low outgassing properties
Adhesive Tape Applications
  • Bond muntin bars to windows
  • Bond & seal polycarbonate lens over LCD
  • Bond pre-painted metals in truck assembly
  • Mount vinyl wiring ducts and conduit channels
  • Bond & seal plastic windows to pre-painted control panels/switch gear
  • Replace rivets
  • Bonding a variety of substrates, including most metal, sealed wood and glass, as well as many plastics, composites and painted surfaces
Adhesive Tape Markets Served
  • Construction
  • Glass Manufacturing
  • Industrial
  • Aerospace
Adhesive Tape Colors
  • Gray
Comparable products
Backing Adhesive Thickness Adhesion
 Acrylic Foam   Acrylic   45.00mil   320.00oz/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).