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Explosive materials are produced in numerous physical forms for their use in mining, engineering, or military applications. The different physical forms and fabrication methods are grouped together in several use forms of explosives.

Explosives are sometimes used in their pure forms, but most common applications transform or modify them.

These use forms are commonly categorized as:

Castings, or castable explosives, are explosive materials or mixtures in which at least one component can be safely melted at a temperature which is safe to handle the other components, and which are normally produced by casting or pouring the molten mixture or material into a form or use container.

In modern usage, Trinitrotoluene or TNT is the basic meltable explosive used in essentially all castable explosives.

Other ingredients found in modern castable explosives include:

Common castable explosives include:

Polymer-bonded explosives, also known as Plastic-bonded explosives or simply PBX, are a relatively solid and inflexible explosive form containing a powdered explosive material and a polymer (plastic) binder. These are usually carefully mixed, often with a very thin coating of the polymer onto the powder grains of the explosive material, and then hot pressed to form dense solid blocks of PBX material.

There are numerous PBX explosives, mostly based on RDX, HMX, or TATB explosive materials. An extensive but by no means complete list of PBX materials is in the main Polymer-bonded explosive article. The major naming systems for PBX use:

LX numbers range from 1 to 17. PBX system numbers start around 9000 and use numerous scattered numbers between there and 9700.

Some commonly known PBXes are:

PBXes are notable for their use in modern Nuclear weapons. Modern US and British nuclear warheads nearly all use insensitive PBX types using only TATB explosive, to increase safety in case of accidents.

Technically known as putties, but more commonly Plastic explosives, these mixtures are a thick, flexible, moldable solid material that can be shaped and will retain that shape after forming, much like clay. Putties normally contain mostly RDX explosive, but may include some PETN (Semtex, for example).

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