Crack Filler Products for Concrete, Asphalt & Masonry

Tech-Bond's silica sand Filler compound, when combined with a SI Bonding Agent, creates repairs that are stronger than the original substrate. The molecular cross-linking process bonds at the surface level rather than relying on adhesion, producing permanent, load-bearing fills suitable for metals, composites, and wood — including structurally demanding applications in industrial and field environments.

Choose SI Green (ultra-thin) for hairline cracks requiring deep penetration. SI Blue (thin-medium) suits standard general-purpose bonding and repairs. SI Black (thick) is ideal for overhead work or detailed precision applications where high control over adhesive flow is needed. Each viscosity is available across multiple kit tiers to match your project scale.

Yes. Tech-Bond's silica sand Filler compound is compatible with metal, wood, composites, and pot metal. It is not recommended for polymers or plastics. Once cured, the filled area can be drilled, tapped, sanded, and painted, making it suitable for structural repairs, stripped screw hole restoration, and gap filling across mechanical, construction, and maintenance applications.

Yes. Tech-Bond offers kits at multiple tiers — Basic, Starter, Deluxe, and Professional — designed for mechanics, handymen, maintenance technicians, and engineers. Professional Kits include a Debonder for full lifecycle control. All kits are field-deployable without special equipment and refrigerator-storable for extended shelf life, making them practical for both shop and on-site repair environments.

Yes. Tech-Bond's patented Polymer Bonding Process is specifically engineered to bond materials historically considered unbondable, including PTFE (Teflon), HDPE, Delrin (POM), polypropylene, and silicone rubber. The Deluxe and Professional Kits include Poly Prep surface preparation and Activator/Accelerator to ensure proper molecular adhesion on these challenging substrates.

Tech-Bond bonding agents and filler kits have extended shelf life when stored in a refrigerator. Before use, products should be brought back to room temperature. This refrigerator-storage compatibility makes the kits practical for maintenance teams and tradespeople who need reliable, long-lasting supplies on hand for infrequent or emergency repair situations.