The Science Behind Why Fevicol and Fevikwik Don't Stick to Their Containers

Understanding Adhesives: Why Don’t They Stick to Their Own Containers?

Fevicol and Fevikwik are staples in many households, used for everything from repairing broken items to crafting projects. While these adhesives are known for their strong bonding capabilities, have you ever wondered why they don’t adhere to the containers they come in?

Let’s delve into the science behind this phenomenon.

What is Glue and How Does It Function?

Glue is fundamentally composed of polymers, which are long chains of molecules that can exhibit stickiness, elasticity, or both. Manufacturers select specific polymers that provide a balance between flexibility and adhesive power.

For white glues like Fevicol, water is incorporated into the polymer to serve as a solvent. This water maintains the glue in a semi-liquid state while it’s in the container. When applied to a surface, the water evaporates, leaving behind the sticky polymer that bonds the surfaces together.

It’s crucial to understand that glue doesn’t actually ‘dry’ in the conventional sense; it cures or hardens as the water evaporates.

Why Doesn’t Glue Stick Inside the Container?

The key is that white glues like Fevicol only start to harden when they come into contact with air. As long as the container is sealed, the water remains, keeping the glue soft and ready to use. However, if the cap is removed, the glue will begin to harden around the opening due to water escaping.

What About Fast-Drying Glues Like Fevikwik?

In contrast to Fevicol, Fevikwik uses cyanoacrylate, a fast-acting adhesive that bonds in the presence of moisture, including the minimal moisture found in the air.

This means that Fevikwik must be stored in completely dry, airtight conditions. The packaging is specifically designed to block any moisture from entering. If the cap is left off, the glue reacts with the air’s moisture, hardens rapidly, and seals itself within the tube.

In conclusion, whether it’s a white glue like Fevicol or an instant adhesive like Fevikwik, the reason they don’t stick to their containers is rooted in chemistry and meticulous packaging. It’s not magic; it’s science that ensures these adhesives bond only when and where we intend.