Acid resistance

posted 19 Jun 2012 by jtsterr
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Where did the name ‘sugru’ come from?

Jane is Irish, and sugru is inspired by the Irish word for play :)

Is sugru removable?

From non-porous surfaces – yes!
To remove sugru, simply cut off the bulk of it off using a knife or scalpel. You can then remove the residue with your nails and some tissue.

Here’s a video we made showing how. 

If you stick sugru to a porous unglazed ceramic surface, or unvarnished wood, it will be removable but will leave a stain.
From fabrics and leathers – once you’ve worked sugru into fabric, it will be very difficult to remove, and will always leave traces.

How can I achieve a good surface finish?

You can use soapy water (a splash of washing up liquid in a glass of water) to get a smooth surface finish. Simply dip your fingers into the soapy water and gently rub the surface of sugru.

How can I achieve a good surface finish?

Can I recycle the foil packet?

Foil Pouch (old packaging) Unfortunately the foil can’t be recycled due to the triple-layer material technology necessary to preserve sugru.

Card + clear plastic bag (new packaging) Partly – yes, the outer card and clear bag can be recycled. The silver minipacks can’t though, due to the aforementioned material technology necessary to preserve sugru.

So, how do I win Fix of the Month?!

Tricky one! We’re open to all submissions – a winning application might be big or small, simple or complex, practical or wacky…it’s not an exact science, mainly because we love all hacks :)
However, there are a couple of things to try to make sure that your project is primed to hit the *five multipack* jackpot…


1. Great hacks deserve great photography!

- A bright, clear and in focus image that really shows off your handiwork will always catch our attention. It might be a close-up of the hack on a plain background, or something that shows it off in its natural habitat.

- Daylight shots are a good start, whichever setting you choose.

- A series of images is great, especially if it shows a step-by-step or before and after process.

2. Share your story

- Once you’ve taken the picture, tell us a bit about the project. What problem did you fix? What made sugru well-suited to it? How did you apply it? Did it save you money, or time, or earn you a bit of love at work/at home? Hearing your stories is our favourite part of our jobs, so don’t spare us the details!

3. Pick your platform

- Different fixes suit different mediums! For instance, if you’ve made a step-by-step, share it on the guide section; if it’s a stand alone shot, upload it to our gallery.  We also love it when you share it with your friends on Facebook and Twitter!

One last thing – make sure you're getting to our awesome monthly newsletter, as that’s where we announce the winners. Just sign up on the bottom of this page and you're good to go!

Is there something I can do to increase the shelf-life?

Yes! The best way to extend sugru’s life is to store it in the fridge. The cold helps sugru last up to four times as long.
Our priority R&D project is to extend the shelf life of sugru – we’re making good progress, but for now the fridge tip is the best way to keep your sugru fresh.

What materials does sugru not bond to?

sugru and most other adhesives struggle to bond with Polypropylene, Polyethylene, plastics with certain oily finishes, and some powder-coated metals.
If you want to use sugru as an impression/moulding material, the best release agent we’ve found is soapy water. It doesn’t leave any residue on the sugru afterwards, and is very clean and easy to use.

Can you sand sugru?

Yes, this works well if you want to shape cured sugru. Do be aware that sanding will result in a more porous surface than the naturally sealed surface you’ll get if you just let sugru cure without sanding.


You can also carve or cut cured sugru with a sharp knife.

Is sugru skin friendly once it has cured? I want to make a set of custom-moulded earbuds.

Yes, the warning on sugru regarding sensitive skin refers to its uncured state. When it’s cured, it’s safe for everyone and general skin contact. However, it’s not medical or food grade, so we can’t recommend it for internal contact – e.g. a mouthpiece.
In-ear applications are fine, but if you have sensitive skin, let the sugru cure for a few days before using them to make sure they’re completely cured.

And is it biodegradable?

You can cut cured sugru into little bits and add them to your compost, where they will break down into their constituent parts over time, but no, it’s not fully biodegradable.