Silicone performs well against water, dilute acids and bases, alcohols, salt solutions, and vegetable or animal oils.

The performance differences stem directly from the chemistry of each vulcanization route.

Ruixiang’s food-grade silicone tubing is formulated to meet the chemical composition and migration limits set out in FDA 21 CFR 177.2600 and EU LFGB (including Regulation (EU) No 10/2011), and holds third-party conformity test reports from accredited laboratories.

Yellowing in transparent silicone tubing has several causes, and the dominant one in most service environments is thermo-oxidative aging: sustained heat exposure causes oxidation of the polymer chains, generating chromophoric groups that absorb visible light. In peroxide-cured tubing specifically, decomposition residuals from the vulcanizing agent — such as organic acids — are a direct contributor to yellowing, as they remain in the material matrix after curing and react with time and heat. UV exposure triggers photooxidation through a separate mechanism, while contact with nitrogen oxides, ozone, or certain chemicals in the environment can initiate surface discoloration independently.

Yes, and it is one of the primary aging markers to monitor.

The -60°C to 200°C range is reliable for continuous long-term use. Silicone’s Si–O backbone has a high bond dissociation energy that confers thermal stability, and its glass transition temperature is around -120°C, which keeps the material flexible at cryogenic temperatures.

The most structurally robust method is co-extrusion: two or more compounds of different colors are fed simultaneously through a multi-channel die and fused into a single body during forming.

Standard silicone tubing falls in the range of 1.10–1.30 g/cm³, though the actual figure depends on the specific compound formulation.