Tremco Sealants Guide: Dymonic FC, Dymonic 100, Vulkem 45 SSL & Vulkem 116

Choosing the right sealant isn't just about picking a brand, it's about matching your project needs with the right formulation. Tremco offers a trusted line of high-performance sealants tailored to a variety of jobsite conditions. In this guide, we'll help you understand the core differences between four popular Tremco products:

1. Dymonic® FC
2. Dymonic® 100
3. Vulkem® 45 SSL
4. Vulkem® 116

Whether you're sealing expansion joints, parking decks, or window perimeters, we'll break down which product performs best in each situation.

Dymonic® FC – Fast Cure for Fast-Paced Projects

A hybrid polyurethane sealant that cures fast and handles movement. It's a favorite for projects that need to move quickly.

Key Features:

1. Skins in ~1 hour
2. Full cure in 3–7 days
3. ±50% movement capability
4. Excellent adhesion to most surfaces
5. Paintable and UV-resistant

Best For:

1. Precast panels
2. Window & door perimeters
3. Control joints
4. Cold-weather installs or time-sensitive jobs

Its fast cure time allows trades to return sooner—perfect for active job sites or turnaround-critical installs.

Dymonic® 100 – Flexibility Meets Finish Quality

This is the "long-game" sealant. Dymonic 100 offers superior color stability, extended tooling time, and excellent weather resistance.

Key Features:

1. Skin time: 3–4 hours
2. Full cure: 7–14 days
3. ±50% movement
4. Minimal shrinkage
5. Superior UV and color stability

Best For:

1. High-visibility architectural joints
2. Curtain walls
3. EIFS/stucco systems
4. Interior/exterior use

If you need a clean, professional finish and have the time for it to cure properly, Dymonic 100 delivers long-lasting aesthetics and performance.

Vulkem® 45 SSL – Self-Leveling Sealant for Horizontal Joints

A semi-self-leveling polyurethane sealant designed for horizontal expansion joints. No tooling required — just pour and go.

Key Features:

1. Self-leveling (SSL = Self-Leveling)
2. Excellent for horizontal applications
3. ±25% movement
4. Traffic-grade durability
5. Skins in 3–5 hours (varies with conditions)

Best For:

1. Sidewalks
2. Plaza decks
3. Driveways
4. Parking garages
5. Concrete-to-concrete joints

It flows easily into place and levels itself, saving you time and ensuring proper joint fill on flat, horizontal surfaces.

Vulkem® 116 – Gun-Grade Workhorse for Vertical Joints

A versatile, one-part polyurethane sealant with a reputation for reliability. Known as the "workhorse" of Tremco's line.

Key Features:

1. Gun-grade (non-sag) for vertical & overhead joints
2. ±25% movement capability
3. Adheres to masonry, aluminum, wood, concrete, and more
4. Excellent weather resistance
5. Skins in ~3 hours

Best For:

1. Window perimeters
2. Masonry expansion joints
3. Precast concrete
4. Wood or aluminum siding

This is a classic go-to for general construction—easy to apply, paintable, and proven across a wide range of conditions.

Which Tremco Sealant Should You Use?

1. Short on time? → Dymonic FC
2. Need extended tooling time or a clean finish? → Dymonic 100
3. Sealing horizontal expansion joints or concrete slabs? → Vulkem 45 SSL
4. Looking for a reliable all-around vertical sealant? → Vulkem 116

Need Help Deciding?

Still unsure which sealant is right for your job? Reach out to our team! We'll help you find the right Tremco product to match your jobsite requirements, whether you're working on a commercial structure or residential renovation.