Model cement, also known as plastic cement or plastic model glue, is a vital tool for any hobbyist or enthusiast who enjoys building plastic models. Whether you are working on scale models of airplanes, cars, ships, or figurines, model cement is essential for creating a strong and durable bond between plastic parts. In this comprehensive guide, we will explore everything you need to know about model cement, from its ingredients and properties to tips and tricks for using it effectively.
**What is model cement?**
Model cement is a type of adhesive specifically designed for bonding plastic parts together. It is commonly used in the assembly of plastic model kits, such as model airplanes, cars, tanks, and ships. Model cement typically comes in a small, cylindrical bottle with a thin applicator nozzle for easy application. The adhesive itself is a liquid that dries quickly to form a strong and permanent bond between plastic surfaces.
**Ingredients and Properties**
The main active ingredient in model cement is a solvent called ethyl acetate. This solvent softens the plastic surfaces of the parts being bonded, allowing them to meld together and form a strong bond when the solvent evaporates. In addition to ethyl acetate, model cement may also contain other additives such as butanone, acetone, or toluene to improve its bonding properties.
Model cement is specifically formulated to work with polystyrene plastic, which is the most common type of plastic used in model kits. It is not suitable for use with other types of plastic, such as vinyl or resin, as it may not bond effectively or could damage the plastic surfaces.
**How to Use model cement**
Using model cement is a straightforward process, but it does require some care and attention to ensure a strong and clean bond between parts. Here are some tips for using model cement effectively:
1. **Prepare the surfaces:** Before applying the cement, make sure the surfaces of the parts to be bonded are clean and free of any dust, grease, or debris. Sanding or roughening the surfaces slightly can also help improve the bond.
2. **Apply a small amount of cement:** Using the thin applicator nozzle, apply a small amount of cement to one of the surfaces to be bonded. Avoid applying too much cement, as it can cause the plastic to melt or become discolored.
3. **Press the parts together:** Quickly press the two parts together, making sure they are properly aligned. Hold the parts in place for a few moments to allow the cement to start bonding the surfaces.
4. **Allow time to dry:** Model cement dries quickly, usually within a few minutes, but it is best to leave the parts undisturbed for at least 24 hours to ensure a strong and durable bond.
5. **Clean up any excess:** If any excess cement squeezes out from between the parts, wipe it away immediately with a damp cloth or cotton swab. Once the cement has dried, it can be difficult to remove without damaging the plastic.
**Tips and Tricks**
– **Ventilation:** Model cement contains volatile solvents that can be harmful if inhaled, so it is important to work in a well-ventilated area or wear a mask to protect yourself from fumes.
– **Precision applicator:** Using a precision applicator nozzle can help you apply the cement more accurately and prevent excess cement from seeping out.
– **Thin cement:** Some modelers prefer to thin their model cement with a small amount of ethyl acetate or acetone to create a thinner consistency for better control and less mess.
– **Cleanup:** To clean dried model cement from your tools or workspace, you can use acetone or nail polish remover. Be careful not to use these solvents on painted surfaces, as they can damage the finish.
Model cement is an indispensable tool for any model builder, providing a strong and reliable bond between plastic parts. With the right techniques and a little practice, you can master the art of using model cement to create stunning plastic models with precision and accuracy. So next time you pick up a plastic model kit, make sure to have a bottle of model cement on hand to bring your vision to life.