The polyurethane sealant testing report is the core document for evaluating product quality and ensuring compliance with engineering standards, usually issued by third-party organizations with CMA/CNAS qualifications. The report revolves around core indicators such as appearance, construction, mechanics, and durability. The following is a complete analysis and standard template.
1、 Report Core Information (Header)
Report Number: (Unique Identification Code)
Sample name: Single/two-component polyurethane sealant
Model specifications: high modulus/low modulus, grade 25/20
Production unit: XXX Company
Client: XXX Company
Testing basis:
JC/T 482-2022 “Polyurethane Building Sealant” (current national standard)
GB/T 13477 “Test Methods for Building Sealing Materials” series
Testing date: XX/XX/XXXX – XX/XX/XXXX
Detection environment: temperature (23 ± 2) ℃, humidity (50 ± 5)%
2、 Core Testing Items and Qualification Standards (JC/T 482-2022)
- Appearance quality
Requirements: fine and even paste, no bubble, no caking, no gel
Judgment: Qualified/Unqualified - Construction performance
table
Testing project technical requirements (standards) qualification judgment
Density (g/cm ³) specified value ± 0.1 qualified
Squeezing ability (mL/min) ≥ 80 (easy to construct) qualified
Dry time (h) ≤ 24, qualified
Sag (mm) ≤ 3 (no sagging during vertical construction) Qualified
Low temperature flexibility (℃) ≤ -40 (no cracks) qualified - Mechanical bonding performance (core)
table
Test item 25 (high modulus) and 20 (medium modulus) qualified judgment
Tensile bonding strength (MPa) ≥ 0.5 ≥ 0.4, qualified
Tensile elongation at break (%) ≥ 1000 ≥ 800, qualified
Elastic recovery rate (%) ≥ 90 ≥ 85, qualified
No damage to the adhesive properties of the fixed extension, no detachment, no damage, and no detachment are qualified
After immersion in water, the adhesion of the fixed extension is not damaged, there is no detachment, no damage, and no detachment is qualified - Durability and aging performance
table
Testing project technical requirements qualification judgment
Thermal aging (70 ℃/28d) with a quality loss of ≤ 5% is qualified
UV aging without cracks, no powdering qualified
Water absorption rate (%) ≤ 3, qualified - Environmental performance (optional)
VOC content: compliant with GB 18583 standard
Mold proof grade: Level 0 (highest grade)