Our easy to use non-drying grease can be applied to
any surface indoors and outdoors and is completely invisible
to the naked eye.
The grease will not cure or dry out and is ideal for
catching criminals "after" the act. The moment
that skin or clothing makes contact an invisible colour
mark is transfered. Because of our unique grease formula,
the mark becomes very difficult to remove even through
The Red or Yellow colour mark will only be revealed
using a value 365nm blacklight torch, available here.