A 2.5kg bag of Kontrol Krystals for refilling the Kontrol moisture traps. These are the class leading solution to damp, moisture and mildew. They combat damp, condensation, musty odours and help prevent mildew. They help keep those unwanted odours, moisture and condensation under control. Can be used in any of the Kontrol traps and is simply poured into the trap and starts working straight away.