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Surface Cleaning and Protection Technologies

KEIM Concretal Fixativ

KEIM Concretal®-Fixativ


1.Product Description

KEIM Concretal-Fixativ is a silicate based diluent and primer developed for concrete surfaces with binding agent potassium silicate, silicasol and organic additives.

2.Application Field

KEIM Concretal-Fixativ is a diluent and additive for silicate based coatings in KEIM Concretal concrete protection system:
KEIM Concretal-W
KEIM Concretal-W-Grob KEIM Concretal-Lasur KEIM Contact-Plus
The absorbency of the highly absorbent mineral application surfaces can be controlled or reduced by KEIM Concretal-Fixativ.

3.Features of Product :

• Permanently bonded to the application surface thanks to silicification.
• Water resistant
• High water vapor permeability
• Non-flammable
• Durable against UV
• Prevents fungus and mold growth
• Resistant to industrial fumes
• Solvent resistance feature
• Eco-friendly
• Excellent low environmental impact construction material

Material Feature :
• Custom weight: approx. 1.05 g/cm3
• pH-value: approx. 11

Colour Tint : Milky White

4.Application Instruction

Surface Preparation
Application area should be hard, dry and clean. Remove dust and oil. Repair damaged areas using the KEIM Concretal concrete repair system.

For pre-treatment of highly absorbent application surfaces:

Apply undiluted KEIM Concretal-Fixativ with a brush.

As diluent on normal flat application surfaces for concrete opaque protective coatings:
KEIM Concretal-W/Concretal-W-Grob. Depending on absorbence of surface, add KEIM Concretal-Fixativ  in to KEIM Concretal- W as max 10% (Maximum 2.5 liter dilution per 25 kg of paint) and stir. Use undiluted KEIM Concretal-W for topcoat.

KEIM Concretal-Lasur
Depending on the absorbency of the application surface, mix about 20-50% KEIM Concretal-Fixativ for KEIM Concretal-Lasur (approximately 0.2-0.5 liters per liter of Lasur) for the primer layer. Use topcoat undiluted KEIM Concretal-Lasur.

As a diluent for low pigment / creative use:
Depending on the desired final coat, KEIM Concretal-Lasur can be diluted with KEIM Concretal-Fixativ in the primer and top coat at the desired ratio.

For more information for Concretal-Fixativ use with KEIM Concretal-W and KEIM Concretal-Lasur, refer to the relevant technical data sheet of the specified products.

Application Conditions

Air and surface temperature: >  + 5°C

Drying time: A drying time of at least 12 hours must be ensured between the pretreatment and the primer and between the coats.

Consumption: For pre-treatment on a smooth application surface: Approx. 0,1–0,2 lt/m2 KEIM Concretal-Fixativ. The stated consumption value is a guide and depends on the absorbency and structure of the application surface. Exact consumption values can be determined by staining the test areas on the application surface.

Cleaning Tools:

After application, clean tools with water immediately.


5 lt ve 20lt packages


The storage life is about 12 months in cool, but in an environment where the temperature does not drop below freezing. Protect from heat and direct sunlight.

7.Dangerous Goods Regulation Class

Not applicable. n / a

8.Transport Hazard Class

Not applicable. n / a


EU Waste Cod No. 06 02 99.
Recycle only buckets without residue.

10.Safety Information

KEIM is Concretal-Fixativ alkaline. Protect untreated areas (eg glass, natural stone, ceramics, etc.) with appropriate precautions. Wipe off any paint splashing into the environment or traffic areas with plenty of water. Protect eyes and skin from paint splashes. Keep out of reach of children.