Guide to Obtaining a California Prop 65 Test Report for Sealants
Date：2026-06-15 09:39:47 Classification
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Guide to Obtaining a California Prop 65 Test Report for Sealant
Sealant (silicone sealants, polyurethane sealants, epoxy sealants, glass glue, etc.) is a high-risk category under California Prop 65 regulations because it directly involves construction, renovation, and food contact, and often contains formaldehyde, phthalates, heavy metals, and other substances listed in the Prop 65 list. The following are key points for obtaining a Prop 65 test report.
I. Why must sealants undergo California Prop 65 testing?
Usage Scenarios: Interior renovation, glass installation, pipe sealing, food container sealing—products involving long-term contact and widespread exposure.
Ingredient Risks: Sealant production often uses plasticizers, solvents, catalysts, preservatives, etc., all of which are abundant on the California Prop 65 list.
High Risk of Litigation: Sealant is one of the categories most frequently involved in Prop 65 litigation (formaldehyde, DEHP, and lead contamination are the most common).
II. Core Testing Items for Sealants
| Test Substances | Common Sources | Safe Harbor Limits (Reference)
| Formaldehyde | Resin, Curing Agent | 40 μg/day (Inhalation)
| Phthalate (Items 6–8) | Plasticizers (DEHP, DBP, BBP, DINP, etc.) | Single ≤ 0.1%
| Lead (Pb) | Pigments, Fillers | 0.5 μg/day (Oral)
| Cadmium (Cd) | Fillers, Pigments | 4.1 μg/day (Oral)
| Mercury (Hg) | Catalyst | 0.06 μg/day (Inhalation)
| Benzene / Toluene / Xylene | Solvents | Carcinogenic, No Safe Harbor
| Propylene Oxide / Ethylene Oxide | Epoxy Sealants | Carcinogenic, No Safe Harbor
| Silica (Inhalable Dust) | Mineral Fillers | Listing
Recommended Strategy: Choose a full screening (200+ items) or a key substance package based on product type, prioritizing high-risk items.
III. Processing Procedure
1. Preliminary Preparation
Confirm the sealant type (silicone/polyurethane/epoxy/acrylic, etc.), application (construction/industrial/food contact), annual export volume, and target population (adults/children).
Request the ingredient list and SDS from the raw material supplier.
2. Solution Confirmation
The testing agency will tailor a testing solution and provide a quote based on the formula and application.
Food contact sealants must additionally comply with FDA 21 CFR or EU 1935/2004.
3. Sample Submission
Sample Quantity: Typically 100–500 g (liquid/paste) or 2–3 finished tubes.
Storage Conditions: Store in a sealed container, avoiding high temperatures and light.
Testing Cycle: Regular 5–7 working days, expedited 3–5 days.
4. Report Evaluation
The test report includes the measured value for each substance + a comparison with the safe harbor limit.
If any substance exceeds the limit, the company has two options:
Adjust the formula to reduce the substance content;
Retain the product but affix a Prop 65 warning label (standard format below).
IV. Prop 65 Warning Label Standard Format
⚠ WARNING: This product can expose you to chemicals including
[Chemical Name], which is known to the State of California to
cause [cancer / birth defects or other reproductive harm].
For more information go to www.P65Warnings.ca.gov
The label must include: a warning triangle symbol + the word "WARNING" + at least one specific substance name + hazard type + official website address.
Font, contrast, and visibility must comply with OEHHA regulations.
V. Fee Reference
| Test Type | Reference Fee (RMB) | Cycle
| Key Substance Package (8–12 items) | 1000 – 4000 | 5–7 days
VI. Important Notes
**No Mandatory Official Certification:** California Proposition 65 does not have "government-issued certificates." The test report itself serves as proof of compliance, but it must be issued by an ISO 17025 accredited laboratory.
**Extremely High Litigation Risk:** It is recommended to purchase Prop 65 liability insurance concurrently ("Abuse law firms" are common litigants).
**Retail/Wholesale Requirements:** Many large retailers in the US (such as Walmart, Home Depot, and Costco) require suppliers to provide Prop 65 test reports before allowing products to be sold.
**Liability Sharing between Importers and Manufacturers:** Both US importers and overseas manufacturers may become defendants. It is recommended to clearly define compliance responsibilities and compensation clauses in the purchase contract.
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