Tremco Dymonic® FC Limestone – 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. It cures rapidly—skinning in as little as 60 minutes and becoming tack-free in 3–4 hours—minimizing dirt pickup and early movement cracking. With ±35 % movement capability, it accommodates expansion and contraction in joints while maintaining long-term flexibility. Once cured, it adheres tenaciously to common substrates like precast concrete, EIFS, masonry, aluminum, and vinyl siding. It is fully paintable and UV resistant, available in standard colors including limestone. Ideal for applications such as expansion/control joints, perimeter caulking, and panel installations.

Key Features:

• Fast cure: skins in ~60 minutes, tack-free in 3–4 hours
• ±35 % movement accommodation, resists green-cracking
• Excellent adhesion to varied building materials
• Paintable and UV-resistant for aesthetic flexibility

• Product Type: One-component, low-modulus, silane-modified hybrid sealant (moisture-curing)
• Movement Capability: ±35 %
• Skin Time: ~60 minutes; Tack-Free: 3–4 hours
• Service Temperature: −40 to 185 °F (−40 to 85 °C)
• Standards Met: 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)
• Packaging: 10.1 oz (300 ml) cartridge; 20 oz (600 ml) sausage
• Colors: Includes Limestone among 19 standard options
• Paintable: Yes; reduces dirt pickup; UV stable
• Shelf Life / Storage: Store in clean, dry place; temperature range 5–110 °F (5–43 °C). Shelf life varies depending on packaging; consult Technical Service.

• 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.

Q: How fast does Dymonic FC cure?
A: Skins in ~60 minutes, tack-free in 3–4 hours; full cure in 14–21 days.

Q: How much movement can it handle?
A: ±35 % movement capability.

Q: Is a primer required?
A: Not usually—but run adhesion tests on specialty substrates.

Q: Can it be painted?
A: Yes. It is paintable, low-VOC, and UV stable. Compatibility with specific paints should be tested.

Q: What are typical applications?
A: Expansion/control joints, precast panel joints, window/door perimeters, EIFS, masonry, vinyl siding.