Butyl rubber belt California 65 testing and processing
Date：2025-07-11 10:03:48 Classification
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The complete process and key points of the California 65 test for butyl rubber tape, integrated from the search results:
1. Necessity of testing
Butyl rubber tape, as a building material (including adhesive/sealant properties), must comply with the "Safe Drinking Water and Toxic Substances Enforcement Act" (CA Prop 65) when exported to California, USA.
The act requires that if a product contains nearly a thousand harmful chemicals on the list (such as lead, cadmium, phthalates, etc.), a warning label must be affixed, otherwise there will be legal risks.
2. Core test items and limits
Based on the material properties of butyl rubber belts, focus on the following substances:
1. Heavy metals
- Total lead (Pb): ≤100ppm (accessible parts)
- Total cadmium (Cd): ≤300ppm (if required by customers)
2. Phthalates
- DEHP/DBP/BBP, etc.: ≤0.1% (1000ppm) for each
3. Flame retardants (if containing foam/fabric components)
- TCEP, TDCPP, etc.: ≤5ppm
4. Bisphenol A (BPA) (if food contact involved): ≤0.1ppm
> Note: Specific items need to be determined according to the rubber formula, and it is recommended to provide a bill of materials (BOM) for preliminary evaluation.
3. Processing process and cycle
1. Application submission
- Provide the certification body (such as DTI Testing, etc.):
- Product manual, bill of materials (BOM)
- Test application form
2. Send samples
- Usually 1-2 complete samples are required, cut into testable parts
3. Laboratory testing
- Cycle: 5-7 working days (routine projects)
- Complex formulas or urgent needs can be shortened to 3 days
4. Report issuance
- CA Prop 65 test report is issued after passing the test
- The report has no fixed validity period, but it needs to be updated with the regulations (the list is revised every year)
4. Subsequent steps for compliance
1. Product identification
- After passing the test, a clear warning label must be added to the product packaging, for example:
> "⚠️ WARNING: This product contains chemicals known to the State of California to cause cancer."
2. Document filing
- Keep the test report and supply chain material declaration to deal with market supervision
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