Test Reports and Certificates

Measured values from third-party laboratories — not catalogue claims.

Third-party test reports

Product	Standard	Key results
Two-component polysulfide sealant N20LM	JC/T 483-2022	Density 1.6 g/cm³, elastic recovery 81%, adhesion after immersion — no failure, no cracking at -40 °C	Details
Two-component polysulfide sealant N25LM	JC/T 483-2022	Tested to the same standard, passed	Details
Two-component polyurethane sealant N20LM	JC/T 482-2022	Density 1.52 g/cm³, elastic recovery 85%, mass loss 1.90%	Details
Rubber waterstop 450×12	GB 18173.2-2014	Tensile strength 17.2 MPa, elongation at break 451%, tear strength 36.7 kN/m, brittleness temperature -45 °C	Details
Water-swelling waterstop strip	GB/T 18173.3-2014	Tensile strength 3.6 MPa, elongation at break 472%, volumetric swelling ratio 372%	Details
PE closed-cell foam board L600	T/CECS 117-2017	Apparent density 0.13 g/cm³, tensile strength 1.52 MPa, elongation 206%, compressive strength 0.21 MPa	Details
Two-component polysulfide sealant — potable water hygiene	GB/T 17219-1998	Colour, turbidity, heavy metals and volatile phenols all within limits for drinking-water contact materials	Details
Two-component polyurethane sealant — potable water hygiene	GB/T 17219-1998	All parameters within limits for drinking-water contact materials	Details

Business licence (scanned copy)