3M VHB 5952 Double-Sided Mounting Tape. 
Various Shapes:
Square
Circle
Rounded Corner Square

Various Sizes: 60mm 55mm 50mm  45mm  40mm  35mm  30mm  25mm  20mm

NEED LARGER SIZES SEE MY OTHER POST

These are approximately 1.0mm thick. 
Great for a variety of uses.  
VHB is exceptionally strong and versatile.


 3M VHB Double Sided Tape Heavy Duty
Color and material: Black acrylic carrier. Diameter: 1in. Thickness: 1mm (39mil). Long term temperature resistance: 93°C(200°F), short term temperature resistance: 149°C(300°F). 90 peel adhesion: 17 lb/in²(30 N/cm), with strong adhesive, efficient waterproof, strong durability.
    
Multipurpose Round double sided mounting tape
Heavy-duty double-sided tape with comfortable foam on both sides is suitable for many occasions and can bond various painted surfaces. Such as LED boards, signs, nameplates, wall hooks, scrap booking, card making, carpet fixing, Decorative material and trim, LED light bar lines, door edges, ABS and PVC threshold boards, license plates, Camera module assembly, car decoration strips, water resistance, moisture resistance, removability and no residue.
  
Strong Round Waterproof Foam Tape
 It is suitable for most surfaces, including installation in outdoor or damp places. It can be stretched according to your requirements, even if it is stretched several times. Will not break. The stickiness is still very strong. Once the curing process is completed, it has excellent waterproof and moisture-proof properties. The longer the time, the more sticky it will be, Ideal for Indoor and Outdoor.
   
High quality Double Sided Mounting Tape
This 3M VHB Double Sided Tape Heavy Duty is fast and easy-to-use permanent bonding method provides high strength and long-term durability. Virtually invisible fastening keeps surfaces smooth, Can be used to replace rivets, screws, spot welding and messy liquid adhesives. Double-sided foam eliminates drilling, grinding, repairing, tightening, welding and related cleaning.
    
Convenient double-sided tape
This foam tape is easy to install and easy to use, just tear off the tape and stick it on the surface of the object. And it is easy to reposition when it is not fully compressed, and the repositioning will not affect the bonding durability, and it can be quickly and firmly bonded when fully compressed.