He initiated the (utopian) project "Zero on Sea", with more than fifty participating artists from over ten countries, and remained true to the fundamental concept of the Nul movement right up to his death in 2013.
The materials that Peeters selected for his works frequently had a very tactile appeal, while he simultaneously created a certain untouchability; thus he stuck candle tapers behind plastic foil, or placed mesh in front of cotton wool.
Henk Peeters also worked with natural processes, such as light and water reflections, and with ice, rain, snow and mist.
And thus, in 1961 Henk Peeters became a work of art himself, when Piero Manzoni appointed him as one; this was certified and signed by the Italian artist.
Until his death (Hall (NL), 2013), Henk Peeters restored artworks from the Nul period and remained an active spokesman for the group.