What is seizing?
When nuts and bolts are left in an assembled position for a long duration of time, they may get corroded due to exposure in surrounding or the threads may get damaged due to excessive pressure applied during tightening. It then becomes a tedious task dismantling the assembly. This condition of the damaged bolt is referred to as a seizure.

What are Anti-Seize Compounds?
As the word itself describes anti means restricts, Seize means getting fixed at a place. Using Anti-Seize Compound assures that when applied to bolts and gaskets during assembly, they can be tightened without thread damage and also dismantled easily.
Also when applied to bolts during assembly it prevents galling. Galling generally refers to cold welding of bolts in nuts due to excess pressure and friction caused during assembly. Anti – Seize compounds serves the purpose of preventing dissimilar metals from getting corrodes in immensely corrosive surroundings and also enhances the performance of machinery.

Problems occurred due to seizing?
Thread Stripping
Variation in the dimensions of thread such as major, pitch & minor diameters is stripping off a thread.
•Cross threading
When threads eventually cross the path that is supposed to follow, If forced it can typically ruin the threading of one or other, hence cross-threading.
If cross-threading occurred then it becomes very difficult to dismantle it.
•Galling
When pressure is applied during installation, the friction causes bolt threads to seize to the threads of a nut or tapped hole. It is also known as “cold welding” or Galling
Once a fastener has seized up from galling it is typically impossible to remove without cutting the bolt or splitting. Later on by using cleaner –  degreaser during maintenance one cannot dismantle the corroded bolted structure.
What is Anti-Seize made up of?

It’s Composition
• Solid lubricants are dispersed in grease or a binder to form an anti-seizing compound. Anti-seize compound when applied creates a thick film which serves as a purpose of preventing contact between two mating surfaces. This reduces difficulty during dismantling and forms low friction coating.
•Graphite powders, copper, nickel, aluminium, molybdenum disulphide etc are common solid lubricants.