CRL Tremco® DyMonic® FC Beige Polyurethane Sealant for Windows

• Fast skin time — less dirt pickup for cleaner cured joints
• Primerless adhesion on most common construction substrates
• Available in sausage packs (regular DyMonic®)

CRL Tremco® DyMonic® FC SKU: 960808323 is a fast-skinning, high-performance, low-modulus, one-component moisture-curing polyurethane sealant engineered for construction joints. DyMonic® FC cures to a smooth, consistent surface and guns easily with conventional caulking equipment. At 70°F (21°C) it skins in about one hour—significantly faster than regular DyMonic® (typical 16 hours)—resulting in less dirt pick-up and faster job completion on precast concrete, curtainwall, and tilt-up panel projects.

Key benefits and differentiators

• Fast-skin polyurethane sealant for construction joints and perimeter sealing
• Primerless adhesion on most clean, dry substrates—reduces prep time
• Non-sag, low-modulus formulation resists shear, moisture, and deflection movement
• High recovery and long-term adhesion that resists weathering

Basic uses
DyMonic® FC is ideal for sealing dynamic moving joints: precast concrete panel joints, curtainwall and storefront perimeter caulking, expansion and control joints, bedding of mullions, frames, and panels. Its balance of high strength, low modulus, and recovery performance helps maintain durable seals in commercial building envelopes.

Technical data
Meets U.S. Federal Specification TT-S-00230C, Type II, Class A; Canadian CAN/CGSB-19.13-M87; and ASTM C 920, Type S, Grade NS, Class 50 (DyMonic® FC) / Class 25 (DyMonic®), Use NT, M, A, and O.

Limitations & warnings
Do not apply to damp or contaminated surfaces. Some substrates (high-performance paints, certain architectural finishes) may require priming. Painting over DyMonic® is not recommended—paint may crack or peel with joint movement. Always check the cartridge label and Specification Data Sheet for additional limitations and surface preparation instructions.

Comparable sealants
CRL: M66, M64, M65W PermaWhite. Tremco®: Vulkem® 116, Vulkem 921, Trem