Seems... the DT's endorse nipple securement.

Spoke Freeze – Nipple locking system for wheelbuilding – on the built wheel
www.dtswiss.com

Apply one drop of DT spoke freeze to each nipple-spoke joint (see picture):
on a degrease spoke thread: nipple is firmly fixed – no loosening
on an oiled spoke thread: nipple is fixed – but still can be turned forcefully with a
nipple wrench for retruing
200906
Full stability after 12 hours at room temperature; the wheel
can already be used after four hours. The adhesive stays
stable at temperatures between -50°C and +150°C.
DT spoke freeze – developed by DT Swiss and Loctite –
is an anaerobic adhesive which only hardens under
hermetic contact of two metal sufraces. It is therefore
supplied in half-filled bottles (net content 10 ml). One
filling lasts for approx. 350 joints.

http://www.dtswiss.com/Resources/Sup...User-Manual-en