What kind of adhesive bonds silicone to stainless steel?
We manufacture a piece of restaurant equipment that is made of 304 stainless steel, and is designed to mount over the side wall of an ice bin. It is also removable. We place FDA silicone pieces on the bottoms of our units to protect the ice bins from being scratched. The silicone pieces are flat, roughly 2″ x 2″, and bond to flat surfaces of 304 stainless steel. We currently use an adhesive-backed silicone sheet to make these protective pieces, but have found that the adhesive and silicone tend to separate over time. Any recommendations would be very much appreciated.
3M™ Double Coated Tape 9731 has a silicone adhesive on one side and an acrylic adhesive on the other side. The silicone side should be on the silicone pad and the acrylic side on the stainless steel. 9731 comes in two varieties: 9731 has the silicone adhesive on the liner-side (you’d need to put it on the SS first) and 9731RW is reverse-wound so that the silicone is on the non-liner side (you can put it on the silicone pad first). Either way, make sure you clean both surfaces with isopropyl alcohol first.
Here are the datasheets for each version:
There are other options if you’d like to try other things (such as cyanoacrylate instant adhesive with a primer), but I think 9731 is worth trying first. Please leave a comment if you have questions or want additional information.