What Causes Bondek to Rust Quickly? Here's How to Avoid It!

Bondek is a lightweight steel floor slab material that is widely used in modern construction, especially as permanent formwork for concrete roofs. However, many contractors and building owners complain that bondek rusts quickly. What is the cause, and how to prevent it?

Causes of Bondek Rusting Quickly

• Poor Galvanized Coating Quality
  Bondek that is not galvanized to the right standards is very susceptible to oxidation, especially when exposed to water or humid air for a long time.
• Storage in Damp or Open Places
  Storing bondek in an open area without cover, especially during the rainy season, makes it quickly exposed to water and accelerates the corrosion process.
• Exposed to Cement Water for Too Long
  During casting, bondek will be exposed to cement water. If it is not immediately protected by concrete or left for too long without further work, the galvanized surface can be damaged and trigger rust.
• Use of Non-Standard Products
  Using bondek from untrusted manufacturers can produce material with thin or uneven galvanized protection, so that its resistance to rust is very low.

How to Avoid Rusty Bondek

• Choose SNI Quality Galvanized Bondek
  Make sure you use bondek from a trusted manufacturer or distributor that provides galvanized bondek with a minimum coating standard of 180 grams/m² for optimal durability.
• Store in a Dry and Protected Place
  Store bondek in a closed warehouse or on a pallet with a tarpaulin cover to avoid direct contact with water and soil.
• Install and Cast Immediately
  Do not let the bondek be installed for too long without casting. The faster it is covered by concrete, the lower the risk of oxidation on the metal surface.
• Use Additional Protective Layers If Necessary
  For projects in extremely humid areas, you can use additional anti-rust protective layers before casting.

Need Quality Galvanized Bondek that is Durable?
PT Intisumber Bajasakti provides SNI bondek with industrial standard galvanized coating, suitable for all types of construction projects. Safe, durable, and efficient in installation.

📞 Contact us at +6221 66675999
🌐 Visit www.intisumberbajasakti.com

Build strong and rust-free structures with PT Intisumber Bajasakti — your reliable partner for high-quality building materials.