Dare to drill: BENTONIL® and MONTIGEL® civil engineering additives by Clariant Functional Minerals Natural BENTONIL® and TIXOTON® drilling additives are based on selected bentonite clays and tailored to suit the most demanding civil engineering applications – from tunneling, pipe jacking, horizontal directional drilling (HDD) and vertical drilling to special foundations. A wide range of grades, a global production and sales network, and unrivalled application knowledge – civil engineers rest assured that Clariant can support any project, wherever, whatever. And when it comes to put things to a final rest, count on Montigel® soil sealing and geotextile bentonites. With our raw material millions of years old, chances are that whatever you want to keep away from the biosphere will stay away.