Sika Primer MB
- Suitable For: use with SikaBond wood flooring adhesives
- Area of use: INT
- Application Method: nylon roller
- Time to full cure: 6 - 18 hours
- Volume: 5kg, 10kg
- Container Type: metal pail
- Type: primer
- Colour: blue
- Brand: Sika
- Manufactuer: Sika
- Box Size: 1
Data Sheets
Sika Primer MB is a 2-component, solvent-free, reactive epoxy primer and moisture barrier designed for use with SikaBond wood flooring adhesives on challenging substrates. It features low viscosity for easy application, excellent penetration, and stabilization of the substrate, making it ideal for refurbishing existing surfaces. The primer supports quick project completion and is suitable for use with underfloor heating systems, providing a reliable solution for a variety of flooring applications.
Key Points
- 2-component, solvent-free, reactive epoxy primer with low viscosity for easy application.
- Provides excellent substrate penetration and stabilization, ideal for refurbishing existing surfaces.
- Acts as a moisture barrier compatible with SikaBond wood flooring adhesives.
- Suitable for use with underfloor heating systems, allowing quick and efficient project completion.
Shelf Life: 24 months from the date of production when stored in its original, undamaged, sealed packaging under proper conditions.
Storage Directions: Keep in a dry environment, protected from direct sunlight, and stored at temperatures between +5°C and +25°C.
This is a 2 part primer consisting of compound A and compound B. Please refer to the technical data sheet for mixing ratios to ensure a uniformed mix.
For more in our range of primers, please click here. For our full range of Sika products, click here.
Alternatively, you can visit Sika Everbuild website here.
Sika Primer MB is specifically designed for use with SikaBond wood flooring adhesives. It provides moisture control on cement-based substrates with moisture content up to 6% CM, consolidates concrete, cement, anhydrite screeds, and refurbished substrates, and enhances adhesion on broadcast mastic asphalt and old adhesive residues.
APPLICATION
When applying Sika Primer MB, all standard practices for wood flooring installation must be followed.
Substrate Preparation:
The substrate must be clean, dry, sound, and free from oils, grease, dust, and loose particles. Paint, cement laitance, and other poorly adhering contaminants must be removed, with at least 50% of residual adhesive cleared (e.g., by grinding). Preliminary bond strength testing is recommended: compressive strength > 8 N/mm² and tensile bond strength > 0.8 N/mm².
- Concrete and cement screeds should be ground and vacuumed.
- Anhydrite screeds must be ground and vacuumed before coating.
- Broadcast mastic asphalt requires excess broadcasting and thorough vacuuming.
- Fiber-reinforced concrete must have exposed fibers burned off.
- Follow the screed manufacturer’s guidelines.
Mixing:
Combine component B with component A in the correct ratio and mix at low speed (300–400 rpm) for at least 3 minutes until homogeneous. Pour the mixed material into a clean container and mix again.
Application Method:
Apply Sika Primer MB uniformly in two directions (90°) using a nylon roller, ensuring a continuous, mirror-like finish.
Cleaning of Tools:
Clean tools and equipment immediately after use with water. Once cured, residual material must be removed mechanically.
LIMITATIONS
- Surfaces left exposed for more than 36 hours must be cleaned and inspected before over-coating.
- Do not apply on substrates with significant vapor pressure.
- Protect freshly applied primer from moisture, condensation, and water for at least 24 hours.
- Avoid puddles on the surface.
- When using SikaBond® Wood Floor Adhesives, do not broadcast sand on Sika Primer MB.
- If leveling compounds (e.g., Sika® Level-200 or -300) are applied, a second coat of primer must be broadcast with quartz sand (0.4–0.7 mm) 15–30 minutes after application.
- Wood flooring in areas without a damp proof membrane requires a Sika Primer MB and Sikafloor® EpoCem® moisture regulator system.
For detailed instructions, contact Sika Technical Services.
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| Elementlength | |||||||
| up to 1,5 m |
up to 2,5 m |
up to 3,5 m |
up to 4,5 m |
up to 2,5 m |
up to 3,5 m |
up to 4,5 m |
|
| Type of window frame material |
Minimum witdth of joints for a butled mounting b in mm |
Minimum witdth of joints for a inner mounting b in mm |
|||||
| Hard PVC (white) | 10 | 15 | 20 | 25 | 10 | 10 | 15 |
| Hard PVC and PMMA (dark) (colour extruded) |
15 | 20 | 25 | 30 | 10 | 15 | 20 |
| Hard PUR integral foam | 10 | 10 | 15 | 20 | 10 | 10 | 15 |
| Wood-aluminium-window | 10 | 10 | 15 | 20 | 10 | 10 | 15 |
| Aluminium-plastic sandwich frame (bright) |
10 | 10 | 15 | 20 | 10 | 10 | 15 |
| Aluminium-plastic sandwich frame (dark) |
10 | 15 | 20 | 25 | 10 | 10 | 15 |
| Wooden window frame | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
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