Via húmeda


silicone based booster for hydrophobic leathers


Water emulsifiable functional silicones.


Pale yellow liquid.


Weakly anionic.

pH value (1:10):

ca. 8.

Acid stability:


Salt stability:


Light fastness:


Heat yellowing:



TRUPOSIST S-BO is a custom-designed “booster” ideally suited for use in combination with other TRUPOSIST hydrophobic fatliquors where it will greatly enhance their waterproofing properties.

Chrome-tanned leathers which require a high degree of retannage with anionic materials often prove difficult in achieving optimum hydrophobic results. The use of TRUPOSIST S-BO will markedly improve the hydrophobic nature of such leathers without detracting from aestetic properties.

In addition, the use of TRUPOSIST S-BO  will have no adverse effect on the dyeing or finishing properties of the leather.

As a result of the special functional compounds in TRUPOSIST S-BO outstanding substantivity and fixation in the leather is assured.


TRUPOSIST S-BO can be utilized at levels between 1 - 3 %, based on shaved weight, together with other TRUPOSIST hydrophobic fatliquors such as TRUPOSIST S-DN e.g.:

The two products should be mixed together prior to emulsification in water at ca. 50 °C.

Process temperatures between 45 - 55 °C and running times of between 60 - 120 minutes. will normally suffice to afford even penetration and good exhaustion, acidification of the fatliquoring bath to pH 3.6 - 3.8 with additions of diluted formic acid will assist in fixation and preparation of the leather for after treatment with a suitable mineral tanning material such as 33 % basic chrome powder. In order to enhance water resistance properties and negate grain pebbling and the danger of reduced area yield it is recommended that TRUPOFIX®WP be utilized together with the mineral capping material at a level of approximately 0.3 - 0.4 % together with 3.0 - 4.0 % chrome.

For further details concerning water resistant leather we suggest reference be made to the
Section “HYDROPHOBIC FATLIQUORS AND AUXILIARIES” contained in our catalogue.

Safety and storage

When handling TRUPOSIST S-BO, normal safety precautions associated with the handling of chemicals should be observed. For more specific details please refer to our safety data sheets.

TRUPOSIST S-BO can be stored for up to 18 months, if temperatures below 5 °C and above 40 °C can be avoided. At temperatures below 15 °C TRUPOSIST S-BO may exhibit a marked increase in viscosity. On prolonged storage TRUPOSIST S-BO may show some degree of settlement which can be rectified by either warming and/or stirring the products thoroughly before use.