Spectrem 2 Single-Component, Neutral-Cure Silicone Sealant for 2-Sided Structural Glazing
 
DESCRIPTION :
Spectrem 2 is a high-performance, singlecomponent, neutral-cure, medium-modulus silicone sealant.
 
 
BASIC USES :
Spectrem 2 is ideal for a variety of perimeter caulking and glazing applications, including 2-sided structural glazing. Spectrem 2 may be used on substrates such as aluminum, glass, steel, painted metal, plastic, stone, concrete and brick.
 
FEATURES & BENEFITS :
• With medium modulus, can be used as a structural tensile bead and weather sealant. • Offering excellent adhesion to a variety of substrates including glass and metal, a single product can be used for a variety of applications on the same job from 2-sided structural glazing to perimeter caulking and joint filling. • Resistance to driving rain, ozone, ultraviolet light, and temperature extremes safeguards against water penetration with exceptional weatherability in all climate zones. • Wide variety of colors to choose from with custom colors and color matching also available for a particular project. • No mixing required, so product is always ready to use for immediate application with conventional caulking equipment. • Greenguard Gold certification ensures safety for use in the most sensitive indoor environments including hospitals and schools.
 
PACKAGING :
• 300 ml cartridges
• 600 ml sausages
• 7.6 L and 17 L pails
• 208.2 L drums
All colors are not available in all package sizes
 
LIMITATIONS :
• Do not apply to damp or contaminated surfaces.
• Use with adequate ventilation.
• Not intended for continuous water immersion.
• Only black silicones are recommended for structural glazing applications.
 
DIRECTIONS FOR USE :
Surface Preparations Surfaces must be sound, clean, and dry. Contact surfaces should be free of loose dirt, dust, oils, and any other contaminants. Tremco recommends that air temperatures be 5 °C or above before applying any sealant. If colder weather is imminent, please contact Tremco CPG APAC Technical representative for details. Application Spectrem 2 is easy to apply with conventional caulking equipment. Fill joint completely and tool. At 23.9 ˚C, 50% RH, a durable skin will form typically within fewer than 10 minutes. Tooling Tooling is recommended immediately after application to ensure firm, intimate contact with the joint interface. Dry tooling is preferred. Joint Design May be used in any joint designed in accordance with accepted architectural/engineering practices. Joint width should be 4 times anticipated movement, but not less than 6 mm wide.
 
Joint Backing Approved structural glazing tapes, such as SGT 900 Series Tape, compatible silicone, or SCR spacer gaskets are approved to promote properly dimensioned tensile beads when used in 2-sided structural glazing applications. When Spectrem 2 sealant is used in non-structural glazing applications, closed-cell polyethylene backer rod is preferred as joint backing to control depth of sealant bead. Where depth of joint will prevent use of joint backing, an adhesive-backed polyethylene tape should be installed to prevent three-sided adhesion. Joint backing must be dry at time of sealant application.
 
 
CLEANING:
Remove excess sealant immediately with a suitable cleaner. Ensure surface is solvent resistant before cleaning. Cured sealant can only be removed mechanically.
 
SEALANT DIMENSIONS :
Expansion joints: The minimum joint width (W) and sealant contact depth (C) of any silicone sealant application is 6.35 mm by 6.35 mm. It is recommended that the sealant joint depth (D), when measured from the face of the sealant bead to the crown of the backer rod, be equal to one-half the sealant joint width (W), known as 2:1 width-to-depth joint ratio. For silicone sealants, the minimum sealant joint depth (D) at crown of backer rod is 3 mm and the maximum sealant joint depth at crown of backer rod is 13 mm. For joints that are wider than 25 mm, please contact Tremco CPG APAC technical representative for additional support. Window perimeter joints: For fillet beads, or angle beads around windows and doors, the sealant should exhibit a minimum sealant contact depth [C] of 6.34 mm onto each substrate. Proper joint backing or bond breaking must be implemented to allow the sealant to perform when exposed to joint movement. Structural Glazing: Special consideration must be taken when using Spectrem 2 in structural glazing applications; therefore, the above sealant dimension guidelines do not apply in these applications. Consult Tremco CPG APAC Technical Services for structural glazing reviews and recommendations.
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