Cleanroom Wipes Guide — Types, Materials & Selection

Cleanroom Wipes Guide — Types, Materials & Selection

Choosing the right cleanroom wipe is one of the most common — and most consequential — decisions in contamination control. The wrong wipe can introduce particles, leave fibers, fail to absorb solvents, or react with sensitive surfaces. This guide covers the major wipe types, materials, and key selection criteria to help you spec the right product for your ISO class and application.

Shop Cleanroom Wipes by Category

  • Cleanroom & Lab Wipes — dry polyester, nonwoven, and specialty wipers for ISO-rated environments
  • Pre-Saturated IPA Wipes — 70/30, 90/10, 99/1, 50/50 and sterile options, ready to use
  • All Wipes — complete catalog including SMT, general purpose, and industrial wipes

Wipe Types at a Glance

Type Material ISO Class Best For
Polyester Knit (Laundered) 100% continuous filament polyester ISO 3–5 Critical environments, low particle/ion generation
Microfiber (Laundered) 70% PET / 30% Nylon microdenier ISO 4–6 High absorbency, optical surfaces, fine particle pickup
Nonwoven Poly-Cellulose 55% cellulose / 45% polyester ISO 5–7 General cleanroom wiping, economical high-volume use
Polypropylene Nonwoven 100% polypropylene ISO 5–7 Chemical resistance, solvent wiping, low lint
Cotton / EcoClean 100% cotton spunlace ISO 6–8 Biodegradable option, general lab and light cleanroom use
Pre-Saturated IPA Polyester, nonwoven, or poly-cellulose ISO 4–7 Surface disinfection, ready-to-use convenience, process consistency

Dry Wipes vs. Pre-Saturated Wipes

Dry wipes are used when the operator controls the solvent type and concentration, or when no solvent is needed. They offer more flexibility and are typically more economical for high-volume wiping tasks. Common applications include surface wiping between process steps, equipment wipe-downs, and spill absorption.

Pre-saturated wipes come pre-loaded with a defined IPA/DI water mixture, eliminating manual dispensing and ensuring consistent solvent concentration across every wipe. They are preferred when process consistency, regulatory compliance, or time efficiency is critical.

IPA Concentration Guide

Concentration Typical Use
70% IPA / 30% DI Water General surface disinfection — most effective antimicrobial ratio; industry standard
90% IPA / 10% DI Water Faster drying, lower residue — used where moisture sensitivity is a concern
99% IPA / 1% DI Water Ultra-low residue, fast evaporation — electronics, PCB, and optical applications
50% IPA / 50% DI Water Extended wet time — used for materials sensitive to high IPA concentration
Sterile (70% IPA) Pharmaceutical, biotech, and aseptic environments requiring sterility assurance

Recommended Cleanroom Wipes

Polyester Knit Wipers

Microfiber Wipers

Nonwoven Wipers

Pre-Saturated IPA Wipes

Frequently Asked Questions

What is the difference between a laundered and non-laundered cleanroom wipe?

Laundered wipes (like polyester knit) are processed in a controlled cleanroom laundry to remove particulates, ionic contamination, and extractables before packaging. Non-laundered wipes (like nonwoven poly-cellulose) are manufactured in a controlled environment but not washed — they are suitable for less critical ISO classes (5–8) and offer a more economical option for general wiping tasks.

What cleanroom wipe should I use for ISO Class 5 (Class 100)?

ISO Class 5 environments typically require laundered polyester knit wipers with ultrasonically sealed or laser-cut edges to minimize particle generation. Examples include the Berkshire MicroSeal 1200, Super Polx 1200, and Teknipure TekniLight and TekniClean series. Avoid nonwoven or cotton wipes in ISO Class 5 unless validated for your process.

What is the best IPA concentration for surface disinfection in cleanrooms?

70% IPA / 30% DI water is the industry standard for surface disinfection — it is the most effective concentration for killing bacteria and spores because the water content slows evaporation, allowing longer contact time. Higher concentrations (90–99%) evaporate too quickly for effective disinfection but are preferred for electronics and residue-sensitive surfaces.

Can I use the same wipe for both dry wiping and wet wiping?

Yes — many polyester and nonwoven wipes are suitable for both dry use and with solvents. However, pre-saturated wipes are formulated for specific solvent concentrations and should not be reused or re-wetted. Always verify chemical compatibility with the wipe manufacturer's documentation before using a wipe with aggressive solvents.

What is the difference between sealed-edge and knife-cut (laser-cut) wipers?

Sealed-edge wipers have edges that are ultrasonically welded or laser-sealed to prevent fiber shedding at the edges — the most common failure point for particle generation. Knife-cut wipers have edges cut without sealing and are suitable for less critical environments. For ISO Class 5 and below, sealed-edge wipers are strongly preferred.

Are pre-saturated wipes compatible with all cleanroom surfaces?

Most 70/30 IPA pre-saturated wipes are compatible with stainless steel, glass, painted surfaces, and most hard plastics. However, IPA can damage some elastomers, certain coatings, and acrylic plastics. Always consult the Safety Data Sheet and test on a non-critical surface area before use on sensitive materials.

What is a good high-volume economical cleanroom wipe for ISO Class 7?

The Berkshire Durx 670 nonwoven wipes (55% cellulose / 45% polyester) are a widely used economical option for ISO Class 7 and 8 environments. They are available in multiple sizes (4"x4" through 18"x18") and pack counts up to 13,500 wipes per case — ideal for high-volume general surface wiping in gowning rooms, equipment wipe-downs, and non-critical process areas.