• UV-Active and shadow curing catalyst
• Low viscosity
• Extremely fast curing at room temperature (after UV-activation)
• Shadow curing at room temperature
• Low hardness (Shore 00)
• Applied mixture offers process control option by UV light (contains UV-tracer)

SEMICOSIL 950 UV B is used in combination with SEMICOSIL 949 UV A as a sprayable, addition-curing, 2-part silicone rubber of low viscosity that cures extremely fast after activation by UV light exposure to a soft silicone elastomer.

All surfaces must be clean and free of contaminants that will inhibit the cure of the 10:1 mixture of SEMICOSIL 950 UV B. Examples of inhibiting contaminants are sulfur containing materials, plasticizers, urethanes, amine containing materials and organometallic compounds – especially organotin compounds. If a substrate's ability to inhibit cure is unknown, a small scale test should be run to determine compatibility.

General recommendations SEMICOSIL 950 UV B should be stored in the original light-tight container. After exposure to daylight or UV-light the material should be immediately processed and not stored any longer. The 'Best use before end' date of each batch is shown on the product label. Storage beyond the date specified on the label does not necessarily mean that the product is no longer usable. In this case however, the properties required for the intended use must be checked for quality assurance reasons.