Effective in only three minutes, aldehyde-free CAVEX ImpreSafe is a non-toxic disinfectant for alginate, silicone and polyether impressions. Due to the extremely short contact time, the surface of the impression remains 100% intact. Cavex ImpreSafe is a complete disinfectant system and comes with one liter of disinfectant concentrate (sufficient for 30 weeks with normal use), a disinfectant container, timer and protocol.