CRL Gray Tremco® Spectrem® 2 High Performance Silicone Sealant

• High performance in demanding glazing and caulking applications
• Tools easily and cures quickly — one-part neutral cure silicone

Tremco® Spectrem® 2 Silicone Sealant is a medium‑modulus, one‑part, high‑performance neutral cure silicone sealant designed for glazing, curtain wall, and general caulking applications where durable weatherproof joints are required. SKU: 947852.


Basic Uses
CRL Tremco® Spectrem® 2 is formulated for cap beads, toe beads, heel beads, tensile beads in two‑sided structural glazing, and sealing joints in curtain wall and window wall systems. Use as a weather seal and general-purpose silicone sealant for exterior fenestration and glazing projects.

Key Differentiators

• Neutral cure chemistry—low odour, safe for sensitive substrates
• Medium modulus—balanced flexibility and load transfer for structural glazing and curtain wall joints
• One‑part, easy tooling and fast curing—reduces installation time

Comparable Sealants
CRL: 95C. Dow Corning®: 795, 995, 791. GE®: SilPruf® 2000, UltraGlaze® SSG 4000. Tremco®: Spectrem® 3. Pecora: 864, 895. Sonneborn: OmniSeal. Sika®: SikaSil®‑WS95.

Limitations
All structural glazing applications must be reviewed and approved by Tremco® Technical Service prior to use. Do not apply to damp, frozen, or contaminated surfaces. Always check the cartridge label and the Tremco Specification Data Sheet for full application limitations and surface preparation instructions.

Technical Data & Standards
Meets or exceeds TT‑S‑001543A (COM‑NBS) Class A; TT‑S‑00230C (COM‑NBS) Class A, Type II; ASTM C‑920 Type S, Grade NS, Class 50, Use NT, M, G, A, O; CAN/CGSB‑19.13‑M87; AAMA 802.3‑92 (Type I and II), 805.2‑94 (Grade C), and 808.3‑92.

Product Warning
All structural glazing applications must be reviewed and approved by Tremco® Technical Service prior to the application of Spectrem® 2. Do not apply to damp or contaminated surfaces. Check cartridge label and Specification Data Sheet for additional limitations.