Sealants serve an important role in building and home design. Preventing moisture and air penetration, it’s essential the right sealant is chosen for the application. However, with many sealants on the market offering different chemical and physical properties, keeping track of them can be difficult.
Learn more about silicone sealants in particular, including their uses, advantages and limitations.
Silicone Sealant Formulations and Uses
Silicone sealants for construction applications are formulated for moisture cure. Their cure rate depends upon:
- Moisture placement in the system
One-part silicone sealants in particular offer two major types, acetoxy and neutral systems, with corresponding sub-categories. However, both cure with reaction to moisture.
Available in a range of modulus formulations, these sealants are ideal for the following construction applications:
|High modulus||Attachment of glass and metal to curtain walls|
|Medium to low modulus||General weatherproofing joints|
|Ultra low modulus||Self-leveling for parking decks and pavement|
Silicone Sealant Advantages
Silicone sealants offer many advantages, including:
- UV stability
- Color stability
- Adhesion to variety of construction surfaces
- Exceptional high movement accommodation
- Extreme temperature resistance
- High workability
As a result, they are a versatile option for many construction projects.
Silicone Sealant Limitations
While silicone sealants work well in many construction applications, it’s important to note their limitations prior to selecting them for a project. These include:
- Possibility of surface dirt retention due to static charge
- Not successfully paintable (in general for high quality silicones)
- Primers may be required on some surfaces
- Lower tear and abrasion resistance
Bostik offers smart silicone sealants that are highly resistant to:
- UV light
- Cyclic movement of dynamic building joints
Providing workability for building, construction and glazing joints, they offer exceptionally high movement accommodation. For more information on our smart silicone sealants and how they improve construction overall, call 800-7-BOSTIK.