Top tips for effective metal sealing
Sealing metal is important to protect it from rust, corrosion, and everyday wear. Following the right steps when working with metal can help the seal last longer and perform better. Here we share some key tips for effective metal sealing:
1. Prepare the Surface for Ideal Adhesion
Before applying any metal bonding adhesive, like those available at https://www.ct1.com/product-applications/metal-to-metal-adhesive/, the metal surface must be clean and dry. Dirt, grease, and oil can prevent the sealant from sticking properly, leading to weak spots and an early failure. Use a degreaser, alcohol-based cleaner, or soapy water to remove any potential contaminants. If using water, make sure the metal is completely dry before continuing.
2. Improve Adhesion by Abrading the Surface
For certain metals, like aluminium and copper, roughening the surface can improve the adhesion. This process, called abrading, creates tiny scratches that help the sealant grip the surface better. You can use sandpaper or a wire brush to do this. Be sure to wipe away any dust afterward, as leftover particles can interfere with the seal.
3. Choose the Right Sealant for the Job
Not all sealants work well with all metals. Choosing the right one will improve the sealants performance. Here are some common types:
- Silicone-based sealants – Great for general metal sealing, flexible, and waterproof
- Polyurethane sealants – Stronger than silicone, better for heavy-duty projects
- Epoxy-based sealants – Extremely tough and long-lasting, ideal for industrial use
Always check the product label to ensure the sealant is compatible with the type of metal you’re sealing.
4. Apply the Sealant Evenly
For the best results, apply the sealant in a smooth, even layer. You can use a brush, roller, or caulking gun, depending on the type of sealant. Avoid applying too much, as this can create drips or weak spots.
5. Allow Proper Drying and Curing Time
Once applied, the sealant needs time to dry and cure. Drying times vary depending on the type of sealant and environmental conditions like humidity and temperature. Most sealants require at least 24 hours to fully cure, but some may take longer.
