Disposable coveralls – Lakeland ChemMax 3 Type 3/4 multi-layer barrier

The Lakeland ChemMax 3 Type 3/4 chemical suit is made from a superior multi-layer barrier film laminated to a spunbound PP substrate.

• Soft and flexible multi-layer barrier fabric for protection against a wide range of chemicals
• This grey coloured chemical suit features extruded fabric construction which results in smoother and more consistent fabric than bonded or glued processes
• Superior softness, flexibility and more consistent chemical barrier (no ‘pinching’ or thinner bond points)
• European manufactured fabric, tested against a full range of chemical warfare agents for anti-terror and civil defence operations
• This coverall also offers Type 5/6 protection
• Extremely low noise level for improved safety and comfort
• All Lakeland ChemMax chemical coveralls feature cushioned double-layer knee pads for increased comfort and safety
• Super-B style design – this coverall has been developed for a superior fit, wearability and durability
• This well-fitted garment features inset sleeves and diamond crotch gusset
• These chemical coveralls feature a three-piece hood design with a tapered centrepiece for a superior face and respirator mask fit
• Advanced face and neck protection with higher neck and zip flaps
• Double zip and storm flap – front fastening for safe and secure protection
• All ChemMax protective coveralls feature stitched and taped seams to create fully sealed seams against liquid and dust ingress*
• Permeation tested against a basic range of chemicals
• Other chemical protective coveralls also available include the mid-level ChemMax 2 and the entry-level ChemMax 1
• All Lakeland coveralls are suitable for asbestos handling and removal

How long have I got?
The online PermaSURE® app is available for use with the ChemMax 3 chemical suit.

PermaSURE® is a free, mobile-friendly online tool that models permeation rates and provides safe-use times by incorporating environmental, temperature and chemical exposure factors. It is based on the known molecular characteristics and behaviour of 4000+ chemicals interacting with Lakeland’s specific chemical fabrics. Click the downloads tab for more info.

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Which garment to use:

Physical factors such as strenuous work?
The physical demands of a task such as climbing ladders, crawling or working in confined spaces, especially if the chemical is highly toxic,  may require higher strength fabric or a specific design, even though permeation analysis and/or the hazard spray type indicate a lighter/more comfortable garment.

Liquid or gas?
Liquid would normally suggest a Type 3 or 4 hazard. However, some chemicals have low boiling points, becoming vapour at low temperatures. In such cases a gas-tight suit might be appropriate. Such information can be obtained from Safety Data Sheets.

Type 3 vs Type 4 –  the different spray tests

EN 14605 – Type 3: ‘jet’ sprays	EN14605 – Type 4: ‘liquid’ sprays
Strong, directional jets of liquid spray Results in intense, local pressure on fabric, seams and joins Back-spray will penetrate under, up or behind any loose flaps or joins In finished garment spray test, single jets of liquid are sprayed at ‘potential’ weak areas of suit (seams, crotch, zip flap ect.)	Wider, less pressurised liquid sprays Results in saturation of fabric (so sealed seams required) but no pressure on garment, seams or joins No risk of back-spray penetrating under, up or behind loose flaps or joins In finished garment spray test, four nozzles with general overspray of liquid

By identifying that your application is Type 4 only (rather than Type 3), this enables more options for garment design and choice, along with a greater level of comfort.

*About stitched and taped seams:

The seam is first stitched and sealed on the outside with a heat activated tape. This results in an impervious seam which is completely liquid-tight. As these seams are generally used for chemical suits the tape type is often constructed from a similar material to the garment fabric in order to maintain similar chemical permeation properties.