Import Addition Cure Silicon Rubber — Buy in wholesale FOB from Supplier in China

Addition cure silicon rubber from Shenzhen Hong Ye Jie Technology Co., Ltd. is a two off-white translucent two-component platinum-cured silicone formulated for mold-making with resin, stone, gypsum and cement products of medium size. The HY-E635 grade cures at a 1:1 mixing ratio with a Shore A hardness of 35±2, a viscosity of 8000±2000 cSt, and a tensile strength equal to or exceeding 60 kgf/cm². Tear strength reaches at least 13 kgf/cm² with elongation at break of 400% or greater, giving the cured mold sufficient elasticity to release detailed castings without damage.

This platinum-addition system differs fundamentally from condensation-cure silicones in its cure chemistry and handling requirements. The material contains no by-products during cure, which means minimal shrinkage and no volatile release, an advantage for precision mold reproduction. Curing remains strongly temperature-dependent at room temperature, so workshop ambient conditions directly affect demould time. The rubber bonds poorly to certain substrates compared with condensation grades, and remains vulnerable to catalyst poisoning from N, S, P, Sn, As, Hg and Pb compounds, as well as from residual condensation silicone on shared tools.

Mold makers in decorative stone, architectural precast, and resin-cast furniture use this grade for master patterns, corbels, column wraps and statuary where fine surface detail must transfer faithfully. Buyers should confirm mixing equipment cleanliness, segregate component A and B containers strictly, and avoid adding pigments or fillers without supplier guidance because unverified additives frequently poison the platinum catalyst. Standard packaging, pallet dimensions and lead time need direct confirmation with Shenzhen Hong Ye Jie Technology Co., Ltd., as the listing does not state these values.

Shenzhen Hong Ye Jie Technology Co., Ltd. operates from Building A, No.3, Hongling First Road, Liulian Shibi, Pingdi Street, Longgang, Shenzhen 518117, Guangdong, China. The supplier holds an imported tier classification and a harbor trust tier. The response rate shows 0.00% with zero average response hours recorded, which indicates buyers should expect delayed or minimal email communication and may need to follow up through alternative channels.

The company profile visible in this listing does not state year of establishment, factory floor area, headcount, revenue, client names, ISO certificates, or export licence details. Any claim about these would need direct verification from the supplier. What the listing does provide is a technical datasheet for a specific addition-cure silicone grade with explicit handling warnings about catalyst poisoning and cross-contamination, suggesting the supplier understands the material's industrial use and is willing to disclose operational caveats rather than hide them.