Tremco Spectrem 1 Tubes : Low Modulus Silicone


• Ultra-low modulus means high elasticity with movement accommodation of +100/-50%.
• With excellent adhesion to a variety of substrates, one product can be used for multiple applications on the same job from perimeter caulking to expansion joints.
• An excellent choice for sealing difficult-to-adhere-to substrates.
• Resistance to driving rain, ozone, ultra-violet 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.

Data Sheet

Color Chart

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Tremco Spectrem 1 is a high-performance, single-component, moisture-cure, ultralow modulus silicone sealant. Questions about Tremco Spectrem 1? Contact Us.
Basic Uses:
Spectrem 1 is the ideal sealant for the most demanding dynamically moving joints. This includes material having a high coefficient of linear expansion such as aluminum curtainwalls, precast concrete panels, metal panels and
window perimeters.

Surface 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 40 °F (5 °C) or above before applying any sealant. If
colder weather is imminent, please refer to the Tremco Guide for Cold Weather Applications at

Spectrem 1 is easy to apply with conventional caulking equipment. Fill joint completely and tool. At 75 ˚F (23.9 ˚C), 50% RH, a durable skin will form within 10 to 30 min. Please visit for complete application instructions.

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 1/4″ (6 mm) wide.

Joint Backing:
Closed-cell polyethylene backer rods or the Tremco sealant tape illmod 600 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 the sealant application.

Applicable Standards:
Spectrem 1 meets or exceeds the requirements of the following specifications:
• ASTM C920 Type S, Grade NS, Class 100/50, Use NT, M, G, A andO
• ASTM C1248
• ASTM C1382
• ASTM E84
• U.S. Federal Specification TT-S-001543A (COM-NBS) Class A
• U.S. Federal Specification TT-S-00230C (COM-NBS) Class A, Type II
• CAN/CGSB 19.13-M87, MCG-2-40-B-N

EIMA Test Method 300.01
• Spectrem 1 has been tested as a component of several wall assemblies meeting ASTM E2357, the Standard Test Method for Determining Air Leakage of Air Barrier Assemblies, and NFPA 285, the Standard Fire Test Method for Evaluation of Fire Propagation Characteristics of Exterior NonLoad-Bearing Wall Assemblies Containing Combustible Components.



Additional information

Weight .55 kg
Dimensions 27.94 × 5.08 × 5.08 cm

Adobe Tan, Aluminum Stone, Anodized Aluminum, Black, Bronze, Buff, Charcoal, Dark Bronze, Dusty Rose, Ivory, Gray, Light Bronze, Limestone, Off White, Precast, Rustic Brick, Sandstone, White