All Metal Fillers

The strongest metal fillers are those that achieve molecular-level bonding rather than surface adhesion. Tech-Bond's silica sand compound, when used with the SI Bonding Agent, creates a cross-linked, permanent repair mass that is stronger than the original substrate — validated through ASTM testing standards and IIT (ISM) Dhanbad research.

For optimal application, Tech-Bond Filler should be at room temperature. Kits stored in a refrigerator for extended shelf life must be brought to room temperature before use. Cured filler offers resistance to heat and harsh environments, making it suitable for industrial and field applications with temperature variation.

Yes. Once Tech-Bond's silica sand filler fully cures with the Bonding Agent, it forms a rock-hard mass that can be drilled, tapped, sanded, and painted. This makes it a practical solution for restoring stripped screw holes, rebuilding worn surfaces, and preparing repaired areas for functional reassembly.

Tech-Bond Filler is compatible with metal, wood, composites, and pot metal. It is not recommended for use on polymers or plastics, where it does not perform gap-filling effectively. For polymer-to-metal repairs, Tech-Bond's full bonding kits with Poly Prep and Bonding Agent should be used instead.

Yes. Tech-Bond's silica sand filler is available in 35-gram, 70-gram, and 8-ounce volumes. It can be purchased as a single bottle or in 5-pack and 10-pack multi-pack quantities, with pricing ranging from $7.95 to $187.95 — suitable for single repairs or high-volume maintenance programs.

A complete repair kit — such as the Deluxe or Professional Kit — is recommended when the repair involves difficult substrates like PTFE, HDPE, or Delrin, or when surface preparation and activation are required. Kits include Bonding Agent, Poly Prep, Accelerator, and Filler for a complete, controlled repair workflow.