Product News: Adhesives & Sealants, Chemical Processing & Waste Management

Two-Part Silicones suit potting and sealing applications.

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Press Release Summary:

May 4, 2009 - Designed to rapidly bond dissimilar substrates, Loctite® Ultra-Clear Two-Part Silicones maintain flexibility at temperatures from -60 to 450°F. Non-corrosive products cure through large gaps and enclosed bond lines, require no primers, and offer low-odor dispensing. With elongations up to 240%, materials withstand extreme vibration, flexing, and thermal shock. Products cure to handling strength in 15 min and offer shelf lives in excess of 12 months at room temperature.

Original Press Release

Ultra Clear, Fast Curing Two-Part Silicones for Potting and Sealing

Press release date: March 18, 2009

Flexible, Water-White Loctite® Silicones Deliver Attractive and Transparent Bondlines

Rocky Hill, Conn. - For potting and sealing applications where bond line aesthetics are critical, Henkel Corporation has introduced Loctite® Ultra-Clear Two-Part Silicones. These unique adhesives/sealants rapidly bond dissimilar substrates - especially glass - and maintain flexibility at both high and low temperatures (-60 to 450ºF).

Loctite® Ultra-Clear Two-Part Silicones cure to handling strength in 15 minutes and offer shelf lives in excess of 12 months at room temperature. These adhesives rapidly build strength and reliably support heavy components such as windows, skylights, outdoor signs and displays. Three ultra-clear, non-corrosive silicone products are currently available.

Loctite® 5620(TM) is a fast-curing silicone that cures in 30 minutes at room temperature. Loctite® 5623(TM) is a tack-free, tough silicone gel that cures in 24 hours at room temperature or in just one hour at 100ºC. Loctite® 5625(TM) is a soft, re-enterable gel silicone that allows for potting compound repair and cures in 24 hours at room temperature or in one hour at 100ºC. All three products can be manually or pneumatically dispensed.

Resisting temperatures up to 230ºC, these non-corrosive silicones cure through large gaps and enclosed bond lines, require no primers and offer low odor dispensing. With elongations as great as 240%, these highly flexible materials withstand extreme vibration, flexing and thermal shock. They are designed to resist UV rays, water, outdoor temperature variations and most cleaning solutions. These two-part formulations provide consistent, uncomplicated mixing, with simple 1:1 mix ratios versus competitive 10:1 mix ratios.

For more information on Loctite® Ultra-Clear Two-Part Silicones, call 1-800-LOCTITE or visit

For more than 130 years, Henkel has been a leader with brands and technologies that make people's lives easier, better and more beautiful. Henkel operates in three business areas - Home Care, Personal Care, and Adhesive Technologies - and is ranked among the Fortune Global 500 companies. More than 60 percent of Henkel's sales are in fast-moving consumer goods, while the industrial business accounts for almost 40 percent of the company's total sales. In fiscal 2008, Henkel generated sales of 14,131 million euros and adjusted operating profit of 1,460 million euros. Our more than 55,000 employees worldwide are dedicated to fulfilling our corporate claim, "A Brand like a Friend," and ensuring that people in more than 125 countries can trust in brands and technologies from Henkel.

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