View source for Putty

{{About|the type of material|the remote shell client|PuTTY|other uses}}
{{Fix bunching|beg}}
[[Image:Fsp firestop.jpg|thumb|[[Intumescent]] [[firestop]] '''putty''' being used over top of ceramic fibre packing to restore the two-hour [[fire-resistance rating]] of a [[concrete]] floor slab, with [[cable]] [[penetrant]]s in a [[building]] in [[Vancouver]], [[British Columbia]], [[Canada]].]]
{{Fix bunching|mid}}
[[Image:Putty reentry.jpg|thumb|right|Intumescent firestop putty used in a successful [[fire test]], which led to a [[Underwriters Laboratories|UL]] [[certification listing]].]]
{{Fix bunching|end}}
'''Putty''' is a generic term for a [[Plasticity (physics)|plastic]] material similar in texture to [[clay]] or [[dough]] typically used in domestic construction and repair as a sealant or filler. '''Painter's Putty''' is typically a [[linseed oil]] based product used for filling holes, minor cracks and defacements in wood only. Putties can also be made [[intumescent]], in which case they are used for [[firestop]]ping as well as for padding of [[Junction box|electrical outlet boxes]] in [[Fire-resistance rating|fire-resistance rated]] [[drywall]] assemblies. In the latter case, [[hydrates]] in the putty produce an [[endothermic]] reaction to mitigate [[heat]] transfer to the unexposed side.

==Overview==
Specifically putty has been used extensively in [[insulated glazing|glazing]] for fixing and sealing panes of glass into wooden frames (or sashes), although its use is decreasing with the prevalence of [[polyvinyl chloride|PVC]] and metal window frames which use synthetic sealants such as [[silicone]]. 

Certain types of putty also have use in the field of [[terminal ballistics]], where the putty can accurately represent the average density of the human body. As such it can be used, for instance, to test the penetrative power of [[projectile]]s, or the stopping power of [[Bulletproof vest|body armour]].

Glazing putty is traditionally made by mixing a base of whiting (finely ground [[chalk]]) with [[linseed oil]] in various proportions. There are a number of synthetic alternatives such as [[polybutene]] based putties, where the polybutene is a low [[molecular weight]] [[oligomer]] replacing the [[linseed oil]]. [[Butyl rubber]] is also added to the mixture to provide some strength and flexibility.

In [[woodworking]], water-based putties are more commonly used, as these emit very little odour, are more easily cleaned up and are compatible with water-based and latex sealers.

==See also==
{|
|
* [[Wood filler]]
* [[Bondo (putty)|Bondo]]
* [[Passive fire protection]]
* [[Firestop]]
* [[Intumescent]]
|
* [[Endothermic]]
* [[Hydrate]]
* [[Mortite Putty]]
* [[Caulking]]
* [[Plumber's Putty]]
|}

==External links==
* [http://wiki.diyfaq.org.uk/index.php?title=Putty_%26_Mastic Putty & Mastic] at wiki.DIY FAQ.org.uk

[[Category:Materials]]
[[Category:Passive fire protection]]
[[Category:Firestops]]


{{chemistry-stub}}

[[de:Kitt]]
[[es:Masilla]]
[[eo:Mastiko]]
[[fr:Mastic (matériau)]]
[[io:Mastico]]
[[is:Kítti]]
[[it:Mastice]]
[[he:דבק שפכטל]]
[[lt:Glaistas]]
[[nl:Kit]]
[[ja:パテ (材料)]]
[[pl:Kit]]
[[sv:Kitt]]
[[Category:2Fix]]