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Sika Sikaflex Primer 429 Pint 91133
Sikaflex Primer 429 promotes adhesion to clean, sound, and dry concrete, masonry, Exterior Insulation Finish Systems (EIFS), and wood — including teak and mahogany. Sikaflex primers are special materials formulated to improve the bond of Sikaflex urethane sealants when applied to specific substrates.
- Single-component, ready to use
- Easily applied by brush, dauber, or spray
$33.74
Availability:
In stock
( 2 Available )
SKU
18240
Sika Sikaflex Primer-429 – Pint
Sikaflex Primer-429 is a specially formulated adhesion promoter designed to improve the bond of Sikaflex urethane sealants to select substrates. It enhances adhesion on clean, sound, and dry concrete, masonry, EIFS, and wood—including teak and mahogany—ensuring long-lasting sealant performance even in demanding conditions.
Key Features
- Improves adhesion of Sikaflex urethane sealants.
- Recommended for EIFS, masonry, concrete, and select woods.
- Single-component, ready-to-use formula.
- Easy application by brush, dauber, or spray.
- Provides secure bonding in submerged conditions.
- Available in pint and gallon packaging.
Applications
- Concrete block, placed concrete, precast concrete, mortar, and grout.
- Granite and unfinished woods including teak and mahogany.
- Exterior Insulation Finish Systems (EIFS) such as Dryvit, Sto, Synergy.
- Projects where testing indicates primer is required for optimal bond.
- Applications where sealant joints will be submerged after curing.
Technical Specifications
| Chemistry | Single-component primer |
| Color | Clear |
| Application Method | Brush, dauber, or spray |
| Coverage | ~300 linear ft. per pint (1/2" x 1/2" joint) |
| Dry Time Before Sealant | >1 hour, <8 hours |
| Packaging | Pints (6/carton), Gallons (2/carton) |
| Shelf Life | 6 months (unopened) |
| Storage Conditions | +40°F to +95°F (+4°C to +35°C), dry, out of sunlight |
| Limitations | Do not use if gelled; do not reseal or reuse containers; use immediately after opening |
Frequently Asked Questions
When is Primer-429 required?
It is typically needed for EIFS substrates and applications where the sealant will be submerged after curing.
How do I apply the primer?
Apply to dry, clean, oil-free substrates using a brush, dauber, or spray.
What is the coverage of a pint container?
Approximately 300 linear feet for a 1/2" x 1/2" joint.
How long before I can apply sealant after priming?
Install sealant between 1 and 8 hours after applying the primer.
What packaging options are available?
Sold in pint containers (6/carton) and gallons (2/carton).
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