Description
Sika Sikasil Primer-2100 Silicone Primer is a Sikasil 2100 surface treatment for Sikasil silicone sealants. It is used on construction and fabrication substrates such as stone, masonry, metal, coated glass, plastics, paints, and lacquer finishes when the sealant system calls for primer before application.
Sikasil 2100 Benefits
- Promotes adhesion before applying compatible Sikasil silicone sealants.
- Works across porous and non-porous construction materials listed by Sika.
- Liquid primer format supports wipe-on application during surface preparation.
- Clear appearance helps keep prep work controlled around visible sealant areas.
- A 15 to 30 minute dry time helps crews plan priming and sealant placement.
Use this primer as part of the full sealant preparation sequence, not as a substitute for cleaning. The substrate should be sound, dry, and free of oil, dust, loose coating, and other contamination. Apply the primer according to the current Sika product data sheet, let it dry for the listed interval, then apply the sealant within the required work window.
Common Applications for Sikasil 2100
- Preparing stone and masonry before compatible silicone sealant work.
- Priming metal and coated glass in construction joints and fabrication assemblies.
- Improving sealant adhesion on selected plastics, paints, and lacquer finishes.
- Shop and field sealant jobs where the Sika surface preparation guide specifies this primer.
- Maintenance work that needs repeatable prep before resealing a joint.
Compatible Substrates and Use Notes
- Stone, masonry, metal, coated glass, plastics, paints, and lacquer finishes listed in Sika guidance.
- Sikasil silicone sealant systems that call for this primer.
- Surfaces that can be cleaned, primed, dried, and sealed within the recommended timing.
- Projects where primer condition is checked before use, including appearance and container closure.
Primer Technical Specifications
| Property | Value |
|---|---|
| SKU | Sikasil Primer 2100 – General purpose silicone primer |
| Product type | Silicone sealant primer |
| Physical state | Liquid |
| Color | Clear |
| Viscosity | 1 cps |
| Recommended dry time | 15 to 30 minutes |
| Packaging | 8 fl oz and 33 fl oz containers |
Packaging and Ordering
Order this primer when a Sikasil sealant detail requires a compatible surface treatment before sealing. Browse related primers and accelerators for other prep products. Review current manufacturer information from Sika USA.
Need Help?
Need help checking primer choice, substrate prep, or sealant timing for a joint detail? Call (800) 220-1966 or email [email protected].







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