CRL Aluminum Dow Corning® 999-A Silicone Glazing & Building Sealant

• General Purpose Silicone Glazing Sealant
• Easily Applied One-Part, High-Modulus Formula
• Sealant Estimator Chart

CRL Dow Corning 999-A (SKU: 999AAL) is a one-part, acetic-cure silicone sealant that cures with atmospheric moisture to form a durable, flexible joint for wet glazing and curtainwall applications. Ideal for conventional glazing of glass and plastic, curtainwall sealing, solar panel edge sealing, and replacement glazing where a high-modulus, weather-resistant seal is required.

Basic Uses
Designed for building construction, 999-A performs well in butt and lap shear glazing joints and sealing glass, plastic, metal assemblies, and curtainwall projections. Suitable for general construction glazing and repair work.

Standards & Technical Data
Meets or exceeds: Federal Specifications TT-S-001543A (COM‑NBS) Class A and TT-S-00230C (COM‑NBS) Class A; ASTM C-920; Canadian CAN2-19.13-M82. Refer to the Specification Data Sheet for full technical details and cure characteristics.

Limitations
Not intended for structural glazing or use on masonry. Review cartridge label and Specification Data Sheet for additional substrate and application limitations.

Comparable Sealants
CRL: 33S. Dap: 100% Silicone. Dow Corning®: 786, 732, 700 (Glazing Silicone, General Purpose). GE®: 1200, 1000, 1700. Tremco®: Proglaze, Tremsil 200, TremPro 644. OSI: HM-270. Pecora: 860, 863. Sonneborn: OmniPlus. Sika®: SikaSil®-GP.

Product Warning
Dow Corning 999-A Silicone Building & Glazing Sealant is not for structural glazing or masonry use. Consult product label and Specification Data Sheet before use.


Order CRL Dow Corning 999-A (999AAL) today for durable, weather-resistant glazing and curtainwall seals.