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User Manual for DuPont

Avoid Exothermic Reactions

Certain chemicals produce a large amount of heat when

they contact water. If your garment is heavily contaminated

with a water-reactive chemical, there is a possibility that the

garment may be damaged during field decontamination

with water. Remove the excess water-reactive chemical

with dry sand or non-reactive absorbent before using a

water decontamination procedure.

Supplied Air Line Limitations

To connect to an external supplied air-line system,

encapsulating garments must be equipped with the

appropriate NIOSH approved garment pass-through. Do not

rely upon this pass-through connection as a physical anchor

for a tether line. Excess force pulling on this pass-through

fitting may result in permanent damage to the garment and

possible injury to the wearer.

Avoid Suffocation

Do not attempt to wear an encapsulating chemical

protective garment without a supplied fresh air respirator.

Use separate, user-supplied, full-face respiratory protection

such as an open circuit, self-contained breathing apparatus

(SCBA) or an external, breathing air quality, air-line system

with garment pass-through and escape bottle.

Never Use Pure Oxygen

The use of 100% oxygen in encapsulating garments

presents serious fire safety and health hazards. Use only

breathing quality compressed air or air-line breathing air.

Tychem

Encapsulated Level A and Encapsulated Level B Suits

™

Attached Socks

The socks attached to Tychem

to be worn inside outer boots. These socks do not have

sufficient durability or slip resistance to be worn as the

outermost layer.

Communications

An encapsulating chemical protective garment often

hampers clarity of voice communications. Consider using

a personal communication system to improve voice clarity.

The wearer may also use hand signals to communicate.

Positive Pressure

Excessive internal positive pressure can damage

encapsulating garments. Do not inflate above a pressure of

8 inches water column.

Use of Adhesive Tape to Seal Chemical Garments

If properly done, taping of PPE interfaces may reduce bulk

material flow, but cannot be relied on to provide a liquid-

tight or vapor-tight seal. Additionally, during an emergency

situation it may be difficult to carefully apply such tape.

Therefore, taping is primarily viewed as a means to hold

PPE items in place e.g. to hold a hood over a respirator face

piece, a sleeve over a glove, a pant leg over a boot, or to

keep a closure flap closed. Taping does not provide reliable

liquid or gas barrier performance.

garments are designed