The Technical Vault
By SOSCleanroom
Pre-moistened swab
91% IPA / 9% DI water
Individually foil-sealed
Large rectangular foam head
Single-use wetness control
CleanTex CT813 WetSwab: A ready-to-use pre-wet foam swab for fast, consistent cleaning of tape heads, electronics, and small assemblies
1) Practical solutions in a critical environment
CT813 WetSwab is a cleanroom-oriented, pre-moistened foam swab built for simple, repeatable point-of-use cleaning where the real failure mode is usually process drift: inconsistent wetness, open-bottle evaporation, and “one more pass” habits that redeposit soils. By packaging a single-use foam swab in an individual foil packet and pre-wetting it with 91% isopropyl alcohol, CT813 makes wetness control easier to train and easier to keep consistent at the bench.
Customer SOP note (disclaimer)
This entry is practical guidance for customers and does not replace your facility SOPs. Validate surface compatibility, cleaning acceptance criteria, and technique in your environment. If your site operates under a regulated or audited quality system, document training, qualification, and change control for cleaning steps and materials.
2) What this product is used for
- Precision cleaning of computer tape heads and tape transports (including oxide removal tasks stated by the product listing).
- Targeted cleaning of electronic circuitry and small electronic assemblies where a larger wipe would over-wet surrounding areas.
- Detail cleaning of narrow flats, rails, and small housings using controlled, linear strokes with a rectangular foam face.
- Convenient point-of-use cleaning where a metered wetness format helps reduce operator-to-operator variability.
3) Why should customers consider this swab
- Built-in wetness control: pre-wet swabs reduce the “too dry / too wet” variability that drives streaking and rework.
- Foil-sealed single-use format: supports disciplined handling and keeps unused swabs protected until point-of-use.
- Rectangular foam contact: a stable face supports controlled strokes on narrow flats and small surfaces.
- Fast-evaporating chemistry: 91% isopropyl alcohol is selected for quick dry-down on many electronics-oriented cleaning tasks (verify in your process).
- Low-linting reality check: no swab is truly lint-free. Surface roughness, stroke pressure, and rework habits drive what transfers.
4) Materials and construction
CT813 uses a large rectangular foam head on a long easy-grip handle, packaged as individually foil-sealed units. Each swab is pre-moistened with 91% isopropyl alcohol for point-of-use convenience and repeatability. As with any foam swab used on delicate surfaces, the key operator control is pressure: let chemistry and contact do the work rather than scrubbing.
Safety note: the associated SDS for this product family describes the solution as an alcohol cleaner and states it is not intended to be used on hands/face or body.
5) Specifications in context
CT813 is a “ready now” swab: open, wipe, discard. That matters most in two situations: (1) when evaporation and inconsistent wetting cause cleaning results to drift over a shift, and (2) when you need to clean a small target without flooding nearby components. The rectangular foam head supports linear stroke patterns that are easy to standardize in training (directional passes, overlap rules, and early change-outs).
6) Specifications
| Attribute |
Value |
| Product | CleanTex CT813 WetSwab Large Pre-Moistened Foam Cleanroom Swab |
| Swab type | Pre-moistened foam swab; large rectangular foam head; long easy-grip handle |
| Pre-wet solution | 91% isopropyl alcohol (product listing). SDS listings for CT813-family products describe a 91% IPA / 9% deionized water solution. |
| Packaging | Individually foil-sealed units |
| Pack size | 25 swabs/box (CT813 BOX) |
| Case pack | 4 boxes/case (100 swabs/case) |
| Dimensions | Not published on the SOSCleanroom product page. (Some distributor listings indicate an overall length of 5.0 in / 127 mm and a 0.5 in / 12.7 mm head width; verify for your program if dimensional control is critical.) |
7) Cleanliness metrics (typical)
Typical cleanroom swab cleanliness metrics (such as ion extractables and NVR) are not published on the SOSCleanroom CT813 listing and are not presented as numerical cleanliness specifications in the associated SDS. For most CT813 use cases, the practical control is functional cleaning performance (no visible streaking/film, no particulate transfer) under your defined stroke count and dwell time.
Operator reality check: with pre-wet swabs, the common drift is not “too dry” — it’s overworking a loaded face. Define a maximum number of passes per swab and discard early when oxide/soil becomes visible.
8) Packaging, sterility, and traceability
- Individually foil-sealed swabs support clean staging and reduce inventory exposure at the bench.
- Single-use behavior is the point: open at point-of-use, clean, discard.
- Sterility: not stated on the SOSCleanroom CT813 listing (treat as non-sterile unless your documentation confirms otherwise).
- Traceability: for controlled programs, capture receiving records (date/lot/quantity) and link to the SDS used by your EHS program.
9) Best-practice use (operator-level)
- Open at point-of-use: do not tear packs in advance and stage wet swabs on benches.
- Directional strokes: use controlled, linear passes; avoid “scribble” scrubbing that redeposits soil.
- Fresh face discipline: rotate the foam face and discard once you see visible loading or drag.
- One swab, one target: do not move from a visibly dirty surface to a cleaner surface with the same swab.
- Avoid pooling: if you see liquid pooling, pause and allow flash-off; pooled solvent can carry dissolved soils into edges and seams.
- Handle hygiene: keep the handle off the work surface; if it contacts the surface, discard the swab.
- Do not use on skin: follow your SDS/label guidance; this product family is not intended for use on hands/face/body.
10) Common failure modes
- Too many passes: once the foam face loads, additional wiping becomes transfer.
- Over-scrubbing: excessive pressure can leave streaking and can shed more debris from the surface being cleaned.
- Cross-contamination: moving from dirty to clean targets with one swab, or letting the handle touch the work surface.
- Pre-opening packs: staged open packs dry out and defeat the entire wetness-control advantage.
- Wrong acceptance criteria: expecting “polished final-clean” results from a single wet swab pass instead of defining a controlled method (stroke count + discard rules).
11) Closest competitors
Not listed in this entry by request. If you want a competitor set, define whether you need dimensional control, a specific alcohol blend, or a specific packaging/traceability format — those three factors usually determine “closest” alternatives.
12) Program fit (how customers standardize CT813)
- Best fit: electronics, tape head, and small-assembly cleaning steps where controlled wetness and small-area targeting matter.
- Training anchor: standardize a stroke pattern, a maximum pass count, and a discard rule. Consistency beats “harder scrubbing.”
- Documentation: keep the SDS in your EHS system and tie receiving records to your internal material list for traceability.
13) Source basis
SOSCleanroom product page (CT813):
https://www.soscleanroom.com/product/swabs/ct813-wetswab-large-pre-moistened-foam-swab/
Safety Data Sheet (covers WetSwab / CT813-family identifiers):
https://media.focenter.com/CMP1007/files/CleanTexCT813WetSwabAlcoholSwabs0.5Tip25SwabsBox_CT813_SDS_SafetyDataSheet_fiberopticcenter.pdf
Standards and regulatory reference hubs (customer education):
ISO: https://www.iso.org/standard/53394.html
FDA: https://www.fda.gov
ASTM: https://www.astm.org
IEST: https://www.iest.org
SOSCleanroom is the source for this Technical Vault entry.
Briefed and approved by the SOSCleanroom (SOS) staff.
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Last reviewed: January 27, 2026
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