Sugru (/ˈsuːɡruː/[1]), also known as Formerol, is a patented[2] multi-purpose, non-slumping brand of adhesive silicone rubber that resembles modelling clay.

Sugru is malleable when removed from its airtight, moisture-proof packaging, retains its plasticity for thirty minutes,[4] and is self-curing at room temperature in approximately 24 hours.

[2] When cured, Sugru has a 'soft touch' or slightly flexible, grippable texture similar to features commonly found in soft overmolds.

[10] Ní Dhulchaointigh studied product design as a post-graduate research student at the Royal College of Art, where she conceived the idea for the substance in 2003 while using mixtures of standard silicone sealants and sawdust in her work.

[20] 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.