Cavity sealing for reliable corrosion protection in the automotive industry

Cavities in vehicle bodies are particularly susceptible to corrosion—often invisible, but with serious consequences. PFINDER offers high-quality cavity sealing solutions that provide long-term protection for vehicle bodies against moisture, condensation, and aggressive substances. Whether in series production, for commercial vehicles, or in post-production preservation—our cavity sealing products (also known as cavity waxes or cavity preservation ) ensure lasting protection and reliable application.

Thanks to their optimal flow properties and flexible protective layer, PFINDER cavity sealing solutions are the first choice for demanding applications in the automotive sector.

Cavity Preservation
Cavity Preservation

Cavity sealing for reliable corrosion protection in the automotive industry

Cavity Preservation
Cavity Preservation

Cavities in vehicle bodies are particularly susceptible to corrosion—often invisible, but with serious consequences. PFINDER offers high-quality cavity sealing solutions that provide long-term protection for vehicle bodies against moisture, condensation, and aggressive substances. Whether in series production, for commercial vehicles, or in post-production preservation—our cavity sealing products (also known as cavity waxes or cavity preservation ) ensure lasting protection and reliable application.

Thanks to their optimal flow properties and flexible protective layer, PFINDER cavity sealing solutions are the first choice for demanding applications in the automotive sector.

What is cavity sealing?

Cavity sealing refers to the targeted application of special corrosion inhibitors in inaccessible cavities of vehicle bodies—for example, in doors, sills, frames, or beams. Cavity waxes are often used for this purpose; after application, they form a thin, flexible protective film that adapts perfectly to the component’s geometry.

After drying, a highly adhesive, self-healing film remains that effectively protects against corrosion—even in the presence of microcracks or scratches. Cavity preservation is thus a key component of the overall corrosion protection concept for modern vehicle bodies. PFINDER products for cavity sealing are designed for durability and can be applied automatically or manually, depending on the application.

What is cavity sealing?

Cavity sealing refers to the targeted application of special corrosion inhibitors in inaccessible cavities of vehicle bodies—for example, in doors, sills, frames, or beams. Cavity waxes are frequently used for this purpose; after application, they form a thin, flexible protective film that adapts perfectly to the component’s geometry.

After drying, a highly adhesive, self-healing film remains that effectively protects against corrosion—even in the presence of microcracks or scratches. Cavity preservation is thus a key component of the overall corrosion protection concept for modern vehicle bodies. PFINDER products for cavity sealing are designed for durability and can be applied automatically or manually, depending on the application.

Features & Benefits of PFINDER Cavity Sealant

Our cavity sealing products and cavity waxes are characterized by:

  • Excellent flow properties—even into narrow gaps and overlaps
  • Self-healing protective layer – automatically seals minor damage
  • Long-lasting protection against moisture and corrosion
  • OEM approvals and in series production worldwide
  • Application possible manually, via spray lance, via spray probe, or automated
  • Variants for different temperature ranges and drying times
  • Also available in a transparent version
  • Variants with UV indicator available

This ensures efficient and reproducible cavity preservation throughout the entire process chain.

Cavity wax made visible through endoscopy
Cavity wax made visible through endoscopy

Typical applications for cavity sealants

PFINDER cavity sealing products are used in a wide variety of industries:

Depending on requirements, solvent-based to solvent-free variants of cavity sealants are available—always with a focus on maximum protection.

Sustainability & Environmental Considerations

PFINDER develops responsible cavity sealing solutions: Many of our cavity waxes are available in low-solvent or even water-based formulations. This helps ensure a more energy-efficient production process—without compromising on protective performance. In addition, we offer products with a flash point > 61°C, thereby enhancing workplace safety.

In this way, PFINDER combines high-performance cavity preservation with a sustainable approach to corrosion protection.

PFINDER develops responsible cavity sealing solutions: Many of our cavity waxes are available in low-solvent or even water-based formulations. This helps ensure a more energy-efficient production process—without compromising on protective performance. We also offer VOC-optimized variants that meet international environmental standards.

In this way, PFINDER combines high-performance cavity preservation with a sustainable approach to corrosion protection.

Product Examples & Applications

Whether it’s classic cavity wax, thin-film cavity sealants for the narrowest gaps, or transparent systems for visual inspection: The PFINDER portfolio offers the right solution for virtually any cavity preservation application. Variants with different flow properties, viscosities, and drying speeds allow for optimal adaptation to your manufacturing processes—from OEM series production to post-preservation in the after-sales sector.

For complex body structures, high-crawling cavity sealants are available that penetrate even overlapping seams and hard-to-reach areas. In addition, we offer cavity waxes with increased temperature resistance or additional noise-damping effects, e.g., for commercial vehicles, buses, or export vehicles with particularly high corrosion exposure. Together with you, we define the right combination of product, application technology, and process window.

In conjunction with our technical support, you can ensure cost-effective, efficient, and reliable results in the field of cavity sealing.

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