Disclaimer

Not Professional Engineering Advice

The Adhesive Coverage Calculator, Epoxy Mix Ratio Calculator, Bond Strength Calculator, Cure Time Calculator, Coverage per Cartridge Calculator, and Lap Joint Designer produce estimates for planning a bond, not a validated engineering design. They are not a substitute for the adhesive manufacturer’s technical data sheet or for a qualified engineer, and they don’t certify that a joint is safe for any particular load or environment. For a structural, load-bearing, or safety-critical bond, have the design reviewed by a competent professional and tested before you rely on it.

How the Numbers Are Estimated

Each calculator applies a standard bonding formula or rule of thumb to the figures you enter — geometric volume for coverage, the mix ratio split for a two-part epoxy, area times shear strength for lap-shear load, the Q10 ≈ 2 doubling rule for cure time versus temperature, and load over shear strength for overlap length. These are idealizations. They assume uniform bond lines, even stress distribution, correct surface preparation, and the exact strength and cure behaviour quoted for the adhesive — conditions real joints only approximate.

Where a Result Might Not Fit Your Job

A calculator result is more likely to miss the mark if your surfaces aren’t properly cleaned and prepared, the adhesive is off-ratio, under-mixed, or past its shelf life, the joint sees peel or cleavage rather than pure shear, the service temperature or environment differs from the test conditions, or the substrate itself fails before the adhesive does. In any of these cases, treat the output as a starting point to verify by testing, not a final answer.

Follow the Technical Data Sheet

Every adhesive has a manufacturer’s technical data sheet (TDS) and safety data sheet (SDS) that give the authoritative mix ratio, pot life, cure schedule, strength figures, and handling and safety precautions for that specific product. Where our general estimate and the data sheet disagree, the data sheet wins. Handle resins, hardeners, and solvents with the protective equipment and ventilation the SDS specifies.

Museum & Learn Content

Entries in the museum and learn sections are sourced from Wikipedia and Wikimedia Commons and presented largely as published there. PerBond doesn’t independently fact-check every claim in that source material, and Wikipedia entries can be incomplete, outdated, or edited after we pull them. Treat these sections as a starting point for further reading, not a verified reference.

Blog & Guides

Articles on the blog reflect general knowledge about adhesives and bonding at the time they were written. Products, formulations, standards, and prices change; always check current specifications and data sheets before buying or bonding based on something you read here.

Third-Party Links & Ads

The site links to outside sites and displays third-party advertisements (including Google AdSense) and, on some pages, Amazon affiliate links (see the Affiliate Disclosure). We don’t vet, control, or endorse the content of external sites or the products advertised on them.

No Warranty, No Liability

Everything on PerBond is provided “as is,” without warranty of accuracy or fitness for a particular purpose. To the extent permitted by law, PerBond isn’t liable for any decision made, or outcome experienced, as a result of using a calculator, reading an article, or relying on museum or learn content.

Changes to This Disclaimer

This page may be revised as tools or content change; the date above reflects the latest revision.

Contact

Questions about this disclaimer, or a tool result that looks wrong: email support@perbond.com or use the contact page.