Epoxy primer Teknobond 300(Текнобонд 300)

Colour	Transparent
Packaging	15 kg / 5 kg (A+B)
Expiration date	12 months in a dry environment in a closed package
Density of the compound (TS EN 2811-1)	1,10 +0,02 g/ml
The life time of the compound	> 30 min (may vary depending on weather conditions)
Drying time of the layer	24-72 hours
Mixture ratio	2 component A: 1 component B
The time of complete drying of the material	7 days
Application temperature	+10 °C - +30 °C
Surface humidity	< 4 %
Relative humidity	up to 80 %
Expenditure	300-500 g/m2 (with a thickness of 1 mm)
Flexural strength (TS EN 196-1)	> 30 N/mm2
Compressive strength (TS EN 196-1)	> 90 N/mm2
Adhesion to concrete surfaces (TS EN 4624)	> 4 N/mm2
Adhesion to metal surfaces (TS EN 4624)	< 3 N/mm2
Shore D Hardness	83
Thermal stability	+50 °C

Foundation quality / preliminary preparation

Teknobond 300 material is used on all types of mineral surfaces, these are old or new concrete bases, self-leveling repair mixes. The concrete surface should be strong, the recommended compressive strength of the concrete screed should be from 25 N/mm², and the tear strength from 1.5 N/mm². The concrete surface must be thoroughly cleaned of weak parts, residues of any foreign materials, dirt, dust and other substances that can reduce the adhesion of the material. Weak concrete must be completely removed, surface defects must be repaired.

Preparation of the working solution

To prepare the working solution, pour component B (approving) into component A (epoxy resin) and use a low-speed mixer (400 rpm) to mix the mixture for 2-3 minutes until a homogeneous mass is obtained. In this case, it is necessary to capture the areas adjacent to the bottom and to the edges of the mixing tank.
If necessary, quartz sand is added to the epoxy primer.

Application

Teknobond 300 epoxy primer is applied to the prepared concrete surface using a metal spatula or a roller with synthetic pile. In some cases (for example, a very cellular surface), it is advisable to apply the mixture using a rubber squeegee followed by rolling with a roller. During the application of the primer, avoid the formation of puddles and drips. The layer of material should be applied evenly.
If the first layer is completely or partially absorbed into the base, the material should be applied again. To save material, re-application must be carried out after the first layer has cured (24-72 hours, the curing time of the layer depends on temperature conditions). After applying the material, it should be protected from direct exposure to water for 24 hours.
The last layer of the primer, if provided for by the coating design, should be sprinkled with calcined quartz sand (the consumption and fraction of sand is determined by the coating design).

Limitations

• Under the concrete slab on which the Teknobond 300 coating is applied, it must have waterproofing.
• For use in cold conditions, the material and fillers should be warmed up beforehand (1-2 days in advance).
• The compressive strength of the concrete screed should be from 25 N/mm2.
• The duration of work and curing depends on the ambient temperature and surface, relative humidity. At low temperatures, the reaction slows down, which prolongs the working time with the mixture and the setting time. High temperatures accelerate the reaction, as a result of which the working time with the mixture and the setting time are reduced.
• Avoid contact with water 24 hours after application.
• Observe the ratio of components.
• Do not mix the components manually.
   

1. What primer should I use before the self-leveling floor?

There is a special high-quality epoxy primer that is used before pouring Teknobond 300 epoxy and polyurethane coatings.

2. Do I need to prime the self-leveling floor after pouring?

After pouring the epoxy self-leveling floor, a primer is not needed, since this is already considered a finishing coating. 

3. What is an epoxy primer?

Epoxy primer is a primer based on epoxy resin. Teknobond 300 is considered a high-quality epoxy primer, which has a high adhesive strength.

4. How to prime the floor under the self-leveling floor?

Priming the surface before pouring the self-leveling floor is recommended to ensure better adhesion between the base and the self-leveling floor. Teknobond 300 low viscosity epoxy primer is considered a good material.

5. Which primer is better for concrete floors?

The primer for the concrete floor should be chosen depending on the finish coating. For example, there is a primer with quartz sand Teknolatex 300, which increases the roughness of the surface, but before painting or applying an epoxy self-leveling floor, it should not be used, as grains may be visible. There is also a multifunctional epoxy primer Teknobond 300, which is ideal for both painting and epoxy coating.