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Dow Unveils Room Temperature Curing Optically-clear Silicone Encapsulant

Published on 2019-04-23. Edited By : SpecialChem

dow-dowsil-encapsulant Dow has 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.

Cost-effective and Platinum-free


Designed for explosion proof and high ingress protection rated luminaries, DOWSIL™ EI-2888 Primerless Silicone 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 for Dow and one of the presenters for the February 21 webinar.

“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. DOWSIL™ EI-2888 Primerless Silicone Encapsulant is an excellent choice for many professional applications, including explosion proof lighting, outdoor displays, and flexible and rigid LED strips.”

DOWSIL™ EI-2888 Primerless Silicone Encapsulant


  • It is a two-part protective material with a 1:1 mix ratio
  • It cures at room temperature with optional heat acceleration
  • It is UL 94 compliant
  • Provides even curing as it is 100 percent polydimethylsiloxane (PDMS) silicone
  • Is insensitive to inhibition, a typical issue for platinum catalysts also material reversion, a traditional problem in enclosed spaces at high temperatures

DOWSIL™ EI-2888 Primerless Silicone Encapsulant 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.

Optically-clear Silicone for Professional LED Lighting


Dow’s new DOWSIL™ EI-2888 Primerless Silicone Encapsulant is 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.

Dow’s new primerless encapsulant is available globally under the DOWSIL™ label, which builds on seven decades of innovation and proven performance of the Dow silicone technology platform.


Source: Dow
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