What is Sikafloor 151?

15/07/2026

What is Sikafloor 151?

What is Sikafloor 151?

Product Description

Sikafloor®-151 is a two-component, low-viscosity, and versatile epoxy resin developed for professional flooring applications. It provides multiple solutions with a single product:

  • Epoxy primer
  • Leveling mortar binder
  • Epoxy mortar coating
  • Intermediate layer coating

It penetrates deeply into low and medium absorbent mineral substrates, creating a strong bonding bridge. This improves the performance and durability of subsequent coating layers. The product is developed by Sika, a global leader in construction chemicals.

For detailed product information, please visit the Bozaltınay website.

Application Areas

Sikafloor®-151 is widely used in the following applications:

As a primer:

  • Concrete floors
  • Epoxy mortar applications
  • Cement-based screed surfaces

As a binder:

  • Resin-based binder for thin and medium-thickness leveling mortars

As an epoxy mortar coating:

  • Screed and repair mortar applications up to 15–20 mm thickness

As an intermediate layer:

  • Self-leveling epoxy systems with thicknesses between 1.5–3 mm

Its versatile usage provides significant advantages in logistics and material management, especially in industrial flooring projects.

Key Advantages

  • Low viscosity: Provides excellent penetration into pores and ensures strong adhesion.
  • High bond strength: > 1.5 N/mm² adhesion strength on concrete (concrete failure).
  • Fast layer application: Helps accelerate construction schedules.
  • Multi-purpose system solution: One epoxy resin for primer, intermediate layer, and mortar applications.
  • LEED compatibility: Contributes to low-emission and material transparency criteria.

Technical Data (Summary)

  • Chemical structure: Two-component epoxy resin
  • Density of mixed components (A+B): ~1.47 kg/L (23 °C)
  • Solid content: ~100%
  • Hardness: Shore D ~80 (7 days / 23 °C)
  • Mixing ratio (by weight): A : B = 85 : 15

Pot Life:

  • ~50 minutes (10 °C)
  • ~25 minutes (20 °C)
  • ~15 minutes (30 °C)

Surface Preparation (The Critical Step for Success)

Maximum performance cannot be expected from an epoxy system without proper surface preparation.

The substrate should meet the following requirements:

  • Concrete compressive strength ≥ 25 N/mm²
  • Pull-off strength ≥ 1.5 N/mm²
  • Free from oil, curing compounds, coatings, and loose particles
  • Cement laitance must be removed by mechanical methods
  • Dust must be completely removed using an industrial vacuum cleaner
  • Surface moisture must be checked and rising damp must not be present

Mixing and Application Recommendations

  • Component A should be mixed using a low-speed mixer (300–400 rpm).
  • Component B is then added and mixed for at least 3 minutes until a homogeneous mixture is achieved.
  • Quartz sand or suitable fillers can be added if required.
  • Air entrainment should be minimized during mixing.

Primer application:
Apply using a roller or squeegee in a cross pattern. A continuous, pore-free film should be achieved.

Leveling/intermediate layer:
Spread with a notched trowel and finish with a roller.

Epoxy mortar application:
Apply onto a “tacky” bonding layer, compact with a trowel, and level the surface.

Tools should be cleaned with solvent before the material begins to cure.

Limitations

  • Protect the applied surface from moisture and condensation during the first 24 hours.
  • Do not apply on substrates with rising damp.
  • Do not use material after exceeding its pot life.
  • Dynamic cracks require a properly designed elastomeric system solution.

Frequently Asked Questions (FAQ)

1) Can Sikafloor®-151 be used as both a primer and binder in the same project?

Yes. Thanks to its multi-purpose formulation, it can be used for multiple layers within the same flooring system.

2) What is the average consumption rate?

  • Primer: 0.35–0.55 kg/m²
  • Leveling mortar: ~1.7–1.9 kg/m²/mm
  • Epoxy mortar: ~2.2 kg/m²/mm

3) When can the next coating layer be applied?

At 20 °C, a minimum waiting time of 12 hours is required before applying a solvent-free top coat. The exact time may vary depending on environmental conditions.

4) What should the surface moisture level be?

The substrate must have low moisture content by weight, and a negative test result for rising damp must be confirmed.

5) Does Sikafloor®-151 contribute to LEED requirements?

Yes. It contributes to low-emission requirements and material transparency criteria within LEED assessments.