About Sugru

Mouldable Glue

Mouldable glue that sets strong, by turning into a durable, flexible silicone rubber.


It can withstand temperatures between -50°C (-58°F) and 180°C (356°F), making it freezer-proof, heatproof and dishwasher-proof. It’s also weatherproof, waterproof, UV-resistant and electrically insulating (up to 24v and under 1 amp). It’s easy to clean with soap and water and equally happy in your washing machine and dishwasher. Sugru can also endure the ocean’s salt water.


Mouldable – Feels soft and malleable like play-dough. Roll the material in your fingers. Press it where you need it, and mould it by hand into any shape. From an ultra-thin patch to a shock-absorbing bumper, you have 30 minutes to shape it, smooth it, and reposition it as required.

Flexible – Leave for 24 hours. Sugru reacts at room temperature, simply on exposure to air. It crosslinks into strong, flexible and tactile silicone rubbers overnight. Sugru will flex with the materials they’re applied to, so you can fix things that need to bend like leathers, fabrics or flexible plastics.

Waterproof & Durable – Once cured, Sugru is waterproof and long-lasting, just like other silicone rubbers. So you can use them in challenging environments like wet bathrooms, shower and sink areas – even outdoors with long-term exposure to the sun, sea and other weather conditions.

Technical Properties:

MULTI-MATERIAL – Sticks permanently to lots of materials like glass, ceramic, wood, metal and plastics. Sugru does not bond to oily plastics like polypropylene, polyethylene or Teflon™.

SETS STRONG – Once cured, it stays in its shape permanently and will remain bonded, often for years to come.

HOLDS UP TO 2KG/4.4LB – Ensure surfaces are clean and dry. A 5g/.17oz single-use pack can hold up to 400x its own weight.

HEAT & COLD RESISTANT– Comfortable at high and low temperatures up to 180°C (356°F) and down to -50°C (-58°F).

DURABLE – Flexibility combined with strong adhesion ensures that your fixes don’t become brittle or crack.

WATERPROOF – Ensure surfaces are dry before use. It can even be used for sealing applications indoors and out.

FLEXIBLE – The thickness of your fix will determine its ultimate flexibility, a thin layer will deliver maximum flex.

SHOCK RESISTANT – Excellent dampening properties can deliver vibration resistance and shock protection.

ELECTRICALLY INSULATING – Like other silicones, it has good thermal and electrical insulation properties. Be careful with electricity. Stick to small consumer electronics rated to below 24 volts.

WEATHERPROOF – Excellent ozone and UV resistance. Only slight fading after years in direct sunlight.


What is it made from?

Formerol, our patented formable silicone technology is unique in its combination of hand formability, adhesive properties and flexibility when cured.

The formulation of Sugru contains 25-50% silicone (polysiloxane), 25–50% talc.

The remaining additives including methyltris (methylethylketoxime) silane [MEKO, as it is called in the paint industry; an anti-skinning agent for paints. Once the paint is applied to a surface, MEKO evaporates, thereby allowing the drying process to proceed. (2)]

and (3-aminopropyl)triethoxysilane. [This allows the process of silanization: to form bonds across the interface between mineral components and organic components present in paints, adhesives, etc. MSDS health hazard score of 3 (3)].

The company claims its formulation can be varied to offer different levels of consistency, plasticity, softness, resiliency, surface adhesion, modulus and abrasion resistance, setting time, density, and ability to float. (1)

Sugru is classified as “not hazardous”  (US & Europe)  but may cause irritation or skin sensitization. (1)

Is Sugru eco-friendly?

A small amount of Sugru can fix and help to prolong the life of many large, complex and disposable items, thereby contributing to the reduction in waste and supporting sustainability. In itself, as a material, Sugru isn’t particularly innovative from an environmental perspective.

  • Sugru is a silicone, and the same environmental guides that apply to general household silicones apply to Sugru.
  • Sugru is not petrochemical based, but it’s not biodegradable.
  • Sugru is manufactured using a low-energy, low-heat, mixing process. This may not be the case for its raw ingredients.
  • We encourage using the minimum amount of Sugru possible for each job. You can also line up jobs so you can use any remaining product – a little Sugru goes a long way.

Sugru, England


We’re FORMFORMFORM, a small but perfectly formed team of inventors, material scientists, designers, video makers, business and production people based in Hackney in East London. Sugru is our first product, and we’re growing quickly!

We’re on a mission to help the world get fixing and customising again. It’s not about ‘making do’ though – it’s much more than that. It’s about taking control and repairing, modifying and evolving the products we own so that they work longer, harder and better for us. Sure, it’s economical and sustainable, but most of all, it just makes sense.

(In 2018, FormFormForm was acquired by German adhesive company Tesa SE, a subsidiary of Beiersdorf.)

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