Luminaires in harsh environments while solving processing challenges

Primerless silicone encapsulant protects LED

silicone encapsulant
The primerless silicone encapsulant is an optically clear silicone for professional LED lighting that cures at room temperature. Source: Dow

Dow, a provider of silicones, silicon-based technology and innovation, unveiled DOWSIL EI-2888 primerless silicone encapsulant, an optically-clear silicone for professional LED lighting that cures at room temperature. This advanced silicone technology provides superb optical performance without compromise and offers unique rheological properties for use with light fixtures in a variety of shapes and forms. Designed for explosion proof and high ingress protection rated luminaries, the encapsulant is also cost-effective to buy and use as its patented composition does not contain platinum– unlike other silicone solutions currently available on the market.

“LED luminaries in harsh environments need protective materials that are reliable, easy to apply, and that provide robustness of cure,” said Konstantin Sobolev, Strategic Marketing Manager. “DOWSIL EI-2888 primerless silicone encapsulant eliminates a time-consuming processing step and reduces waste that can occur if curing is compromised by surface contaminants or moisture. This low-viscosity silicone also dispenses readily and adheres reliably without sacrificing optical properties. It is an excellent choice for many professional applications, including explosion proof lighting, outdoor displays, and flexible and rigid LED strips.”

A two-part protective material with a 1:1 mix ratio, DOWSIL EI-2888 cures at room temperature with optional heat acceleration. This UL 94 compliant, 100 percent polydimethylsiloxane (PDMS) silicone provides even curing and is insensitive to inhibition, a typical issue for platinum catalysts; and material reversion, a traditional problem in enclosed spaces at high temperatures. It can be applied with automated static or dynamic metered mixing, manual mixing, or with flow, pour or needle dispensing equipment. This novel self-priming encapsulant adheres to a variety of substrates and supports the design of innovative LED luminaires in IP-rated enclosures.


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