Tremco Dymonic® FC Hartford Green – Polyurethane Construction Sealant (10.1 oz Tube)

Tremco Dymonic FC is a premium, single-component, silane-modified polymer hybrid sealant engineered for high-performance sealing in dynamic building joints. This Hartford Green 10.1 oz tube cures quickly, with skin time in about 60 minutes and tack-free time in 3–4 hours, helping reduce dirt pickup and early movement cracking.
Once cured, Dymonic FC provides ±35% movement capability and remains flexible for expansion and contraction in joints. It adheres to common construction substrates including precast concrete, EIFS, masonry, aluminum, and vinyl siding, and is paintable and UV resistant for exterior or visible applications.

Key Features:

• Fast cure with skin time around 60 minutes and tack-free time in 3–4 hours
• ±35% movement capability for dynamic building joints
• Excellent adhesion to common construction substrates
• Paintable and UV resistant after cure

• Brand: Tremco
• Product: Dymonic FC
• Color: Hartford Green
• Container size: 10.1 oz / 300 ml cartridge
• Product type: One-component, low-modulus, silane-modified hybrid sealant
• Cure type: Moisture-curing
• Movement capability: ±35%
• Skin time: Approximately 60 minutes
• Tack-free time: 3–4 hours
• Full cure time: 14–21 days
• Service temperature: -40°F to 185°F / -40°C to 85°C
• Standards: ASTM C920 Type S, Grade NS, Class 35, Use NT, M, A, O; ASTM C1248; TT-S-00230C Class A Type II; CAN/CGSB 19.13-M87; UL-2079 / ASTM E1966
• Paintable: Yes
• UV resistant: Yes
• Storage: Store in a clean, dry place between 5°F and 110°F / 5°C and 43°C

• Prepare substrates: clean, dry, structurally sound; remove all contaminants.
• Joint design: use proper width-to-depth ratio; insert closed-cell backer rod or bond-breaker tape.
• Priming: typically not required, but test adhesion on challenging substrates.
• Application: apply with standard caulking equipment; tool to ensure full contact. Dry tooling preferred.
• Cure: skins in ~60 minutes, tack-free in 3–4 hours, full cure in 14–21 days.
• Clean up: remove uncured sealant with solvent; cured material must be cut or scraped.