Terms of Service
Last updated: July 19, 2026
These terms cover using perbond.com: the six calculators, the blog, the learn section, and the museum. Using the site means you agree to them.
What PerBond Is
PerBond is an independent, ad-supported reference site about industrial adhesives and bonding — epoxies, structural adhesives, surface preparation, curing, and joint design. It is not an adhesive manufacturer or retailer, not affiliated with any adhesive brand, and not a professional engineering service. The Adhesive Coverage Calculator, Epoxy Mix Ratio Calculator, Bond Strength Calculator, Cure Time Calculator, Coverage per Cartridge Calculator, and Lap Joint Designer are free, browser-based tools built on standard bonding formulas and the numbers you enter.
Using the Tools
No account, sign-up, or payment is required to use any calculator. Inputs you type into a tool are processed in your browser to produce an estimate; see the Privacy Policyfor what does and doesn’t leave your device. Results are general guidance based on standard formulas and rules of thumb, not a validated design for your specific materials, adhesive, or loading.
Not Professional Engineering Advice
Nothing on PerBond is professional engineering advice. Adhesive performance depends on the exact product, substrates, surface preparation, cure conditions, and service environment. For a load-bearing or safety-critical joint, confirm your design with a qualified engineer and the adhesive’s technical data sheet before relying on a calculator result. The full reasoning behind this is in the Disclaimer.
Acceptable Use
When using the site, you agree not to:
- Automate requests against the tools at a volume that degrades the site for other visitors
- Scrape, republish, or resell the site’s content or tool logic wholesale
- Attempt to bypass, disrupt, or probe the site’s security
- Submit deliberately false information through the contact or subscribe forms
- Use the site for any unlawful purpose
Content & Ownership
PerBond’s own text, calculator design, and site design belong to PerBond. The museum and learn sections draw their entries, images, and facts from Wikipedia and Wikimedia Commons, used under their respective public-domain and Creative Commons licenses — that content belongs to its original contributors, not to PerBond.
Ads & Affiliate Links
The site carries Google AdSense advertising and, on some tool and article pages, Amazon affiliate links. Both are disclosed in full in the Affiliate Disclosure. Ads and product links are served by third parties and are not endorsements by PerBond.
No Warranty
The site, its tools, and its content are provided “as is,” without warranties of any kind, express or implied, including accuracy, fitness for a particular purpose, or uninterrupted availability. We try to keep the calculators correct and the guides current, but we don’t guarantee either.
Limitation of Liability
To the extent permitted by law, PerBond isn’t liable for damages arising from your use of, or inability to use, the site or its tools, including decisions made based on a calculator result or an article.
Changes to These Terms
These Terms may be updated from time to time; the date above reflects the most recent revision. Continuing to use the site after a change means you accept the updated Terms.
Governing Law
These Terms are governed by the laws of the United States, without regard to conflict-of-laws principles.
Contact
Questions about these Terms: email support@perbond.com or use the contact page.