2x Kilrock Damp Clear 500g Refill Sachets. Your Damp Clear Moisture Trap needs to be refilled once all the crystals are gone and the base is full of liquid. Each Kilrock Damp Clear Refill is effective for up to 3 months in rooms of up to 20sqm. Always place the Moisture Trap in a stable position to avoid spillage. Keep out of reach of children and animals. Warning: Irritant. Liquid is mildly caustic so rubber gloves should be worn. Kilrock 500g Damp Clear Refill Sachets 2 Pack Plastic, Calcium chloride flakes