To be used as an additive to Kiilto Saumalaasti grout and Kiilto Lattiasaumalaasti floor tile grout, when improved flexibility, adhesion, strength, moisture and weather resistance are required.




Kiilto Strong Saumavahviste is an additive that improves elasticity, adhesion as well as moisture and weather resistance of Kiilto Saumalaasti and Kiilto Lattiasaumalaasti.

Package Size EAN Code
500 ml 6411511986501
Application temperature

The lowest application temperature +5 °C.

Density/specific weight

Approx. 1.0 kg/l

Package sizes

0.5 l plastic bottle


Unopened in a dry place 12 months.

Instructions for use

To start with, mix Kiilto Strong Saumavahviste additive with water as per instructions, and add a corresponding amount of tile grout powder to the mixture.

Unglazed or matt glazed tiles have to be moistened prior to grouting. This will ease the cleaning process after grouting. Using Kiilto Strong Saumavahviste will improve the grout's adhesion to the tile surface and thus cleaning after grouting could be more laborious than normal. Since the porosity of tiles and stones varies, we recommend testing their cleanability beforehand. Avoid adding too much Kiilto Strong Saumavahviste, as it will make cleaning more difficult. For grouting instructions see the tile grout instructions for use.

When grouting tiles with narrow and low joints (glass mosaic or wall tiles with faux joints), Kiilto Saumalaasti improved with Kiilto Strong Saumavahviste can be used, provided that the joint width and depth is 1 mm at the minimum. Choose a light colour, since dark colours in joints of varying depths may differ. We do not recommend the jointing of floor tiles with faux joints, as hard wear may result in the cracking of the grout. For more detailed instructions, visit

Kiilto Saumalaasti20 kg10 kg3 kg
water5.4 l2.7 l0.80 l
Kiilto Strong1.0 l0.5 l0.15 l

Kiilto Lattiasaumalaasti20 kg10 kg3 kg
water4.0 l2.0 l0.60 l
Kiilto Strong1.0 l0.5 l0.15 l

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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