ActivPak (LS) Diffusers by Zerust

Provides Targeted Atmospheric Corrosion Protection. Works in Minutes to Prevent Flash Corrosion.


Zerust ActivPak (LS) packets offer a new technology of Vapor Corrosion Inhibitor (VCI) combined with Volatile Flash Corrosion Inhibitor (FCI) to protect ferrous, non-ferrous, and aluminum metals in enclosed spaces. This combination goes to work in minutes to protect against both flash rust and also against long-term corrosion with its progressive VCI chemistry.

Use ActivPak to protect electronics, equipment and assets in corrosive environments such as in salty air, sewage treatment plants or power plants. The packets reduce flash-rust and corrosion incidents even on contaminated parts and in challenging environments. ActivPak provides corrosion control when manufacturing processes are not in full control and there are concerns with process fluids leaving corrosive residues.

Product Name
Normal Environment* Aggressive Environment*
Volume of Protection Duration of Protection
(up to)
Volume of Protection

Duration of Protection 
(up to)

ActivTab (LS)-25 0.25 ft3 (0.0074 m3) 6 months 0.025 ft3 (0.0007 m3) 15 days
ActivCapsule FAC1-1s 4 ft3 (0.12 m3) 1 year 0.35 ft3 (0.01 m3) 1 month
ActivPak (LS)-T330 5 ft3 (0.15 m3) 1 year 2 ft3 (0.05 m3) 2 months
ActivPak(LS)-33 16 ft3 (0.45 m3) 1 year 5 ft3 (0.15 m3) 2 months
ActivPak(LS)-T350 26 ft3 (0.75 m3) 1 year 7 ft3 (0.2 m3) 2 months
ActivPak(LS)-35 35 ft3 (1 m3) 1 year 11 ft3 (0.2 m3) 2 months
ActivPak-T330 5 ft3 (0.15 m3) 2 years 2 ft3 (0.05 m3) 4 months
ActivPak-33 16 ft3 (0.45 m3) 2 years 5 ft3 (0.15 m3) 4 months
ActivPak-T350 26 ft3 (0.75 m3) 2 years 7 ft3 (0.2 m3) 4 months
ActivPak-35 35 ft3 (1 m3) 2 years 11 ft3 (0.3 m3) 4 months


Individual packets in cases of 10, 50, and 100. Additional sizes available upon request.

Protection Type: 
Ferrous and aluminum protection. Protects yellow metals when used as instructed. Do not place in direct contact with copper, brass or zinc and test before use.

Protection Life: 
Refer to table. Seal or limit air exchange within the enclosure to maximize the protection life

How To Use In Shipment And Storage

1. Determine the correct number of ActivPak(LS) packets needed to protect intended space. Do not overload protection.

2. Remove from plastic packaging, but do not puncture product sachet. Note that punctured sachets may result in a dust hazard.

3. Place packet on top of items. If using multiple packets, distribute them evenly.

4. For the packet to be effective, restrict airflow to the enclosure.

5. Do not place in direct contact with yellow metals (brass, copper, zinc).

Lab Test Results

SO2 Acid Gas Exposure Test Results

Competitor VCI 
Commonly Used 
VCI Powder