14

I have an old PC case. I spray painted it because it was a little bit rusty. Now I'm trying to attach a set of rubber feet to it, but I have no idea what kind of glue to use.

I tried hot glue, but it didn't hold at all. Superglue dissolves rubber, and I think most two-component glues would too. What would you use?

8
  • 3
    Sounds like perhaps the problem is the paint itself not sticking well. Can you sand or file off the paint where you want to put the feet? Or alternately add a coat of polyurethane gloss?
    – DrSheldon
    Jun 17 at 20:52
  • 3
    The rubber feet didn't have sticky tape on them? Jun 17 at 20:54
  • 1
    It probably had around 1995. Jun 17 at 22:12
  • 2
    Two-component (resin-type) glues should not damage rubber. You should just make sure to pick one that sets into an elastic bond, not a hard one. Most manufacturers I know state that on the package.
    – WooShell
    Jun 18 at 12:06
  • 1
    If the rubber feet you're using are 25 years old, perhaps you should purchase some new ones? They're pretty cheap and the glue they come with is likely to work better than most other things. Rubber that old is likely to be at the point where it's starting to degrade anyhow. Jun 18 at 20:50
13

A thin plastic tape with strong adhesive on both sides is what I usually use for these types of applications. The tape I use is Scotch 665 double-coated tape; it's a bit hard to find but an electronics supplier (e.g. Digikey, quantity of 1 in various sizes) or industrial supply house (e.g. Grainger , in quantities of 36) should stock it. You could also try a double-sided tape sold for home/office use such as Scotch 667-ESF; it's widely available at retail but might not hold as well.

3
  • 3
    Double-sided carpet-fitting tape is good: stronger than office type but quite easy to get
    – Chris H
    Jun 18 at 10:14
  • 2
    Home Depot carries several varieties of 3M / Scotch 2-sided mounting tapes, some of which are extremely strong. Usually on display in the paint department.
    – MTA
    Jun 18 at 15:06
  • 2
    These tapes benefit from having a smooth, clean mounting surface and — critically — pressure being applied at time of joining. I wish I'd known that years ago, or I wouldn't have had so many rubber feet fall off.
    – scruss
    Jun 21 at 17:11
7

I find this website helpful for similar questions: https://thistothat.com/ "We are here to help you choose the right glue for your bonding requirements"

Rubber to Metal For the strongest bond, we recommend:

Household Goop

Not as strong but good for a large area is:

3M 80 
1
  • 6
    It's actually "Rubber to Paint" in OP's case, but the site doesn't have an option for that, unfortunately.
    – DarkDust
    Jun 18 at 6:56
6

I have actually used superglue (cyanoacrylate) for this without ill effects. It's not solvent-based and doesn't dissolve rubber (even natural rubber, which this probably isn't). The downside is it's brittle, but for feet that's OK unless you make a habit of dragging the case around. Some "rubber" materials don't bond well, but adhesive companies recommend trying cyanoacrylate first. That link is worth a reda as it mentions degreasing the surface first, and a few other tips. Superglue should also stick to the paint fairly well, though a bit of roughening may be in order.

2-part epoxies again aren't solvent-based and won't attack the rubber, but they don't bond to it as well as superglue, and the rubber easily peels off.

3
  • 1
    Cyanacrylate is a bad idea for sticking rubber to solids. It sets into a hard crystalline layer, and soft/elastic materials like rubber peel off of that rather easily.
    – WooShell
    Jun 18 at 12:02
  • 1
    @WooShell I defer to the expert I linked to (you may wish to use a rubber-toughened variety though, as those are more flexible). Peel forces aren't likely to be significant when the joint is in compression, as with a case foot, but that's why I mentioned the risk of dragging it around. I've done this on a few things, including heavy lab equipment that has to be dragged out from under benches
    – Chris H
    Jun 18 at 12:06
  • @WooShell Unless you use rubberized/flexible cyanoacrylate (Loctite 4902 for example)
    – slebetman
    Jun 19 at 14:53
3

3M VHB (very high bond) double-sided tape is your friend. Not only will it not fall off, you will have trouble pulling it off once it cures.

1
  • Welcome, Bob! VHB is great if both surfaces are absolutely clean and you provide the right amount of pressure on application. Without these details it can be challenging to use.
    – scruss
    Aug 24 at 14:50
1

I use Fix-All Adhesive (by Superglue Corp) for most everything. I have rubber feet held onto a computer with it for years. Not magical, but it works. Can be found in 5/8 fl oz tubes in $1 stores, or double that price if you order online. It stays a bit flexible and can be peeled off for easy cleanup. Doesn't handle UV (sunlight) particularly well.

1

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.