Kiilto Pro Fixbinder
Additive for cementitious adhesive

Additive for a cementitious adhesive to improve flexibility and bond strength. Suitable also as an additive for Kiilto 60 and Kiilto 60 Plus when making bond bridge and tiling green concrete (min. 1 month).

Special features

  • mortar additive




Additive for the cementitious adhesives to improve flexibility and bond strength both indoors and outdoors. Can be used for:

1. Improving adhesive's performance when tiling on relatively green concrete (min. 1 month, humidity of subfloor max. 95 % RH). During tiling take into account tensions caused by concrete's shrinking and build enough movement joints.

2. Installing glass mosaic. Due to its small size, smooth and dense surface, glass mosaic is challenging to install. Installing glass mosaic requires expertise and caution. Kiilto Pro Fixbinder improves bond strength and moisture-resistance of the cementitious adhesive.

3. Strengthening of chipboard floor by gluing a gypsum board onto it with cementitious adhesive with Pro Fixbinder additive. E.g., 15-mm thick gypsum board glued on 22 mm tongued chipboard with support distance C 600 has the same bending stiffness as the 22 mm tongued chipboard with support distance C 300.

4. Improving the bond between the concrete substrate and Kiilto 60/Kiilto 60 Plus floor screed. The bond layer is brushed on the substrate prior to floor screed. The bond layer is made of a mix of floor screed (20 kg), Kiilto Pro Fixbinder (1 l) and water (1.5 l). The floor screed is rubbed on the fresh bond screed.

Kiilto Pro Fixbinder improves the bond strength, moisture-resistance and elasticity of cementitious adhesives. Alkalinity of cement does not impair the effect of the additive. Not recommended for use with other cementitious products, e.g., floor levellings or grouts.

Package Size EAN Code
5 l 6411512074054
Density/specific weight


Frost resistance


Package sizes

5 l plastic container


Unopened in a dry place 1 year.


Polymer dispersion

Instructions for use

Kiilto Pro Fixbinder and water are mixed with cementitious adhesive according to the table below. The advised amount of water for adjusting the consistency of the material is an approximate value. Use of additive slightly retards the setting and drying process. If tiling with Kiilto Flexfix, Kiilto Superfix DF, Kiilto Pro Lightfix and Kiilto Floorfix DF without additive, wait for an additional 24 hours before light loading and jointing. When using Kiilto Kerapid DF and Kiilto Floorfix DF Rapid, the retarding effect is approx. 5 hours. Prevailing conditions, such as temperature of the room, substrate and additive, and substrate quality and humidity will significantly affect the setting and drying time. Therefore, our recommendations can only be used as a guide.


Product Fixbinder (litres) 


Kiilto Flexfix Saneerauslaasti (20 kg)  5 2
Kiilto Superfix DF (15 kg)  5 2
Kiilto Pro Lightfix (15 kg) 5 2
Kiilto Kerapid DF (15 kg) 4.5 

Kiilto Floorfix DF Rapid (15 kg)

Kiilto Floorfix DF (20 kg)
Kiilto Pro Lightfix53

Additional information

The information given in this product data sheet is based on our tests and our practical knowledge. The technical data is defined in standard conditions. Variations in local working conditions and methods will affect the product performance and result. We guarantee the high quality of our products according to our Quality Management System. No liability can be accepted from incorrect use of the product or prevailing conditions, over which we have no control. Thus, we cannot be held responsible for the final result. The correct use of the product presupposes that the user has made him/herself aware of the contents of the working instructions and procedure guide, if provided.

Environment and safety

Avoid unnecessary skin contact and exposure with the fresh product, use safety gloves. Refer to material safety data sheet. For information on product and package disposal, go to

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