Spray Adhesive Vs Contact Cement

Spray adhesive, stored in aerosol cans, is characterized by its low viscosity, making it highly popular due to its ease of application. Available in various formulations tailored for specific applications, certain types boast considerable strength with the inclusion of additives.

 

When it comes to bonding different surfaces, both spray adhesive and contact cement are commonly employed. However, neither is inherently superior to the other. Your selection should be guided by the specific requirements of your project.

 

In this post, we aim to delineate the distinctions between spray adhesive and contact cement. By the end, we hope to provide you with insights that will aid in making a well-informed decision. Keep reading for more!

 

What Is Spray Adhesive?

 

Spray adhesive, stored in aerosol cans, is characterized by its low viscosity, making it highly popular due to its ease of application. Available in various formulations tailored for specific applications, certain types boast considerable strength with the inclusion of additives.

 

While commonly used for bonding fabrics, spray adhesives serve a multitude of purposes. They are specifically formulated for applications such as headliner installation, stenciling, foam mounting, vinyl application, screen printing, embroidery, crafting, upholstery, and more.

 

The hallmark of spray adhesives lies in their flexibility and repositionability, making them ideal for use on surfaces comprising multiple materials.

 

The strength of the bond depends on the specific formulation of the adhesive. Permanent varieties typically require up to 24 hours for full curing.

 

Pros and cons of spray adhesive

 

Spray adhesive is popular for its convenience, but this versatile glue still has some drawbacks. Here are the pros and cons of spray adhesive at a glance:

 

Pros:

1. Quick Drying: It dries rapidly, making it ideal for projects with tight deadlines.

2. Clear Drying: The adhesive dries clear, leaving no unsightly residue behind.

3. Easy Control: Applied in a fine mist, it allows for mess-free application and precise control.

4. Flexibility: Its flexibility enables gentle readjustment of bonded surfaces even after adhesion.

5. Convenient Packaging: Packaged in canisters, it is easy to use.

6. Heat and Water Resistance: Resistant to heat and water, it is suitable for outdoor applications.

7. Wide Availability: Spray adhesives are readily available at most craft stores.

 

Cons:

1. Cost: Spray adhesives tend to be slightly pricier compared to contact cement and other adhesive options.

2. Toxic Fumes: Due to the emission of toxic fumes, it is imperative to use spray glue in well-ventilated areas. However, brands labeled as non-toxic are significantly less harmful.

3. Potential for Staining or Warping: Incorrect application of spray adhesive may result in staining or warping of surfaces.

4. Unsuitability for Heavy-Duty Industrial Use: Spray adhesive is not recommended for industrial applications involving heavy pressure or loads.

 

 

What Is Contact Cement?

 

Contact cement is renowned for its strong initial adhesion, providing an instant, high-strength bond between surfaces. Its application differs from other adhesives as it requires coating both surfaces rather than just one. Once applied, the cement must dry to achieve effectiveness. Nowadays, there are sprayable variants of contact cement available.

 

In certain instances, pressing the surfaces together after the cement has partially dried can further enhance the bond's durability. This versatile adhesive is compatible with various materials, including veneers, laminate, cork, leather, rubber, and specially formulated versions for metal bonding. The bond formed is resistant to water and heat.

 

However, precision is crucial when working with contact cement, whether in its traditional form or as a spray. Once surfaces touch, adjustments are not possible. Additionally, adequate ventilation in the workspace is essential.

 

Pros and cons of contact cement

 

In general, contact cement is highly suitable for projects that require strong, reliable bonds. However, in order to decide whether to choose this glue for your project, learn about the pros and cons of this permanent glue.

 

Pros:

1. Superior Bond Strength: Contact cement provides an exceptionally strong, permanent bond, surpassing that of spray adhesive.

2. Heat and Moisture Resistance: It offers resistance to both heat and moisture, ensuring durability in various environments.

3. Suitable for Large Surface Areas: Contact cement is ideal for bonding materials with large surface areas effectively.

 

Cons:

1. Flammability: Contact cement is highly flammable, necessitating careful handling and usage.

2. Long Drying Time: It requires a prolonged drying period, with the bond strength reaching its peak after approximately 7 days.

3. Challenging Application: Applying contact cement can be challenging for some projects as it requires coating both surfaces involved in the bond.

 

Differences Between Spray Adhesive And Contact Cement

 

Composition:

 

Spray adhesive and contact cement contain similar chemicals but have different compositions. Spray adhesive typically includes rubber, tackifying resin, dispersant, chlorinated solvent, varsol, and propellant.

 

Contact cement is primarily rubber-based, using natural rubber or synthetic polychloroprene. This component renders it a permanent adhesive, offering bonding that cannot be readjusted.

 

Usage Time:

 

Spray adhesives dry quickly, with surfaces bonding in 5 minutes or less. However, there are both permanent and temporary variants available. New-generation permanent adhesives are popular among woodworkers.

 

On the other hand, contact cement dries slowly, with peak holding strength achieved in about 7 days under sufficient pressure. Finishing or trimming operations can be performed immediately after bonding, although the full curing time is longer. Spray-on contact cement dries faster in comparison.

 

Applicability:

 

Spray adhesive has a broader range of applications than contact cement. While it is well-suited for fabrics, it can also bond various other materials.

 

Contact cement, conversely, is more commonly used in woodworking. It is particularly convenient for attaching laminate to surfaces made of laminate or other materials. Spray-on contact cement is also utilized for joining laminate surfaces together.

 

Durability:

 

Temporary spray adhesives typically remain tacky for around 45 minutes, while permanent adhesives can last for years under normal conditions. However, exposure to harsh chemicals or extreme temperatures can weaken the bond over time. It's important to note that even permanent bonds gradually lose strength and may not last indefinitely.

 

Contact cement, in certain applications, can provide a lifetime bond. However, the duration of the bond depends on factors such as exposure to chemicals and temperature extremes.

 

Temperature Resistance:

 

Water-based spray adhesives can withstand temperatures up to 71°C, with some formulations offering resistance up to 120°C.

 

In contrast, contact cement has relatively low temperature resistance. It is not suitable for bonding materials such as brass, copper, and copper alloys, as it begins to break down when temperatures exceed 60°C.

 

Conclusion

 

Spray adhesive and contact cement serve overlapping purposes and are suitable for various projects, including those involving wood. However, for non-porous surfaces like laminates, plastic, or metal, contact cement typically offers superior adhesion compared to spray adhesive.

 

Ultimately, the selection between these two types of glue hinges on the specific surfaces you intend to bond. Armed with this knowledge, you are now better equipped to make a well-informed decision.