About this product
harb is a high-performance liquid additive engineered to create a strong and permanent bond between cementitious concrete, mortar and screeds.
Thanks to its strong and elastic adhesion effect, it can also withstand high stresses.
Main features at a glance
- As a bonding agent for concrete
- As a bonding agent for mortar
- As a bonding agent for screeds
- Suitable for wet and outdoor areas
- Proper subfloor preparation must be ensured by shot blasting, milling or grinding.
- The surface of the subfloor must be clean, absorbent, load-bearing, firm and free of cracks.
- After preparation, the surface must then be cleaned and watered at least 24 hours in advance so that the substrate has absorbed sufficient moisture.
- Avoid the formation of puddles.
- The size of the surface to be treated with harb must be selected so that the new concrete, screed or mortar can always be applied fresh on fresh.
- Mix all aggregates including the mineral bonding agent harb as described in the mix design in a container provided for this purpose.
- Next, stir the mixture thoroughly with a hand mixer for at least 3 minutes until a slurry is formed.
- Spread the ready-mixed bonding agent over the prepared subfloor and brush into the subfloor with a hard broom.
- Immediately cover the brushed-in bonding agent with concrete, screed or mortar to prevent it from drying out prematurely.
- Depending on the condition of the subfloor, material for 15-20 m² is obtained.
Engineered to meet British Standards (BS 13892/BS 8204):
Main features at a glance
Application areas
- As a bonding agent for concrete
- As a bonding agent for mortar
- As a bonding agent for screeds
- Suitable for wet and outdoor areas
Subfloor pre-treatment
- Proper subfloor preparation must be ensured by shot blasting, milling or grinding.
- The surface of the subfloor must be clean, absorbent, load-bearing, firm and free of cracks.
- After preparation, the surface must then be cleaned and watered at least 24 hours in advance so that the substrate has absorbed sufficient moisture.
- Avoid the formation of puddles.
- The size of the surface to be treated with harb must be selected so that the new concrete, screed or mortar can always be applied fresh on fresh.
Mixing instructions
- Mix all aggregates including the mineral bonding agent harb as described in the mix design in a container provided for this purpose.
- Next, stir the mixture thoroughly with a hand mixer for at least 3 minutes until a slurry is formed.
- Spread the ready-mixed bonding agent over the prepared subfloor and brush into the subfloor with a hard broom.
- Immediately cover the brushed-in bonding agent with concrete, screed or mortar to prevent it from drying out prematurely.
- Depending on the condition of the subfloor, material for 15-20 m² is obtained.