REDSEAL PRO 110 —
rigid water-focused fibre gasket for crush-resistant sealing
It carries the material system stated in the technical data, with REACH and RoHS compliance and documented drinking-water approvals. Its water absorption behaviour may contribute to sealing contact after first fill in suitable water service. TZW, CRECEP and WRAS certified. A relevant option where potable water documentation and rigid seating are part of the specification.
Selection rule: REDSEAL is selected for documented water-focused duties where a rigid red fibre gasket is specified.
Use this when: documented potable-water duties, rigid flat-face joints and applications where a firm red fibre gasket is specified.
Do not use this when: do not use it to compensate for poor face condition, low bolt load, gas duty or high-temperature industrial service.
Move to the next material when: the job needs broader media coverage, softer conformance, gas approval or high-temperature performance.
What it is
REDSEAL PRO 110
REDSEAL PRO 110 is a non-asbestos gasket material based on cotton cellulose fibres — vulcanised, with the material system stated in the technical data. That last point matters: every other fibre gasket in the Kinetics Line range uses an NBR rubber binder to hold the fibres together and give the material its flexibility. REDSEAL does not. It is water-focused fibre material — chemically clean, REACH and RoHS compliant, and certified for drinking water applications in three markets.
The 47% water absorption figure is not a limitation. It is the design mechanism. When REDSEAL comes into contact with water, it swells. That swelling creates additional sealing contact with the mating faces — the material is intended to increase sealing contact as the system fills under water-service conditions.
The number that defines it: 47% water absorption in 6 hours. This is a property of vulcanised cellulose — the material absorbs water and can increase sealing contact in water service. Combined with 70 MPa tensile strength and 71% elastic recovery, REDSEAL is a mechanically strong material that performs well in the water service applications it is certified for.
How it seals — the mechanism
Mechanical compression
Joint is assembled and tightened. The gasket compresses between the mating faces — same as any flat gasket. Initial seal is created by mechanical contact.
Water contact and swelling
System fills with water. REDSEAL absorbs water through the joint face. The material swells — 47% by weight in 6 hours. Swelling increases contact pressure against both faces.
Active seal under pressure
The swollen gasket fills minor surface imperfections and maintains positive contact under system pressure. In water service, sealing contact may increase after first fill as the material absorbs water within its intended application.
The water absorption can increase sealing contact in water service — particularly useful in older pipework and distribution systems where face conditions are variable. This is a functional characteristic of the material, not a substitute for correct assembly on a clean face.
The trade-off is straightforward: this material is designed for water. It should not be used with oils, fuels, glycols or any medium other than water — the swelling mechanism is water-specific, and other media will not activate it in the same way. Some may cause degradation.
The approvals — three markets, one application
REDSEAL PRO 110 carries drinking water certification in three markets. This is not a general material approval — it is specifically for potable water service.
TZW
Drinking water — GermanyCRECEP
Drinking water — FranceWRAS
Drinking water — United KingdomREACH / RoHS
Chemical purity — EU complianceTZW, CRECEP and WRAS are the German, French and UK drinking water approval bodies respectively. All three require testing for extractable substances that could contaminate the water supply — REDSEAL passes all three. REACH and RoHS compliance confirms the material is chemically pure and suitable for municipal waste disposal at end of life.
REDSEAL carries TZW, CRECEP and WRAS drinking water certification — all three simultaneously. If the application is potable water distribution and the market requires one or more of these approvals, REDSEAL is one of the certified options for that duty.
When to use it — and what it is not for
Where REDSEAL makes sense
- Drinking water distribution systems — municipal and building
- Potable water pipelines where TZW, CRECEP or WRAS is required
- General water service flanges where chemical purity is the priority
- Older water distribution systems where minor face irregularities are present — the swelling effect may help increase sealing contact in suitable water-service conditions
- Applications requiring REACH and RoHS compliant materials
Not for these applications
- Standard heating circuits — GREENSEAL PRO 180 is the simpler all-round option
- Oil, fuel or glycol service — use GREENSEAL or BLUESEAL
- Gas service — use BLUESEAL ULTRA 350
- Temperatures above 110°C
- High-pressure applications above 16 bar
- Any medium other than water — the swelling mechanism is water-specific
What makes it different from GREENSEAL for water service
GREENSEAL PRO 180 also covers potable water service — it carries FDA and KTW approval and is suitable for water, glycols, oils and alcohols across a wider temperature range. So why REDSEAL?
Two reasons. First, the drinking water certifications: REDSEAL carries TZW, CRECEP and WRAS — all three simultaneously. GREENSEAL carries FDA and KTW. If the market or specification requires WRAS or CRECEP specifically, REDSEAL is one of the certified options for that duty.
Second, the sealing mechanism. GREENSEAL seals by controlled compression like a standard fibre gasket. REDSEAL is a rigid material that seals mechanically first, with water absorption that may add contact after first fill in suitable potable-water applications. That behaviour can be useful in the right water-service joint, but it is not a substitute for a clean face and correct tightening.
One important characteristic: REDSEAL has very low compressibility — 4.5% compared to 9% for GREENSEAL. It is a hard, rigid material. It requires adequate bolt load to seat correctly and does not conform to surface irregularities through compression the way softer materials do. The swelling effect may increase sealing contact once water is present — but the initial mechanical joint assembly still needs correct tightening on a clean face.
Practical notes
Unlike standard fibre gaskets which are at maximum effectiveness immediately after tightening, REDSEAL reaches its full sealing potential after the system fills and the gasket has had time to absorb water and swell. Minor early seepage in water-only service may change after first fill, but any visible leak should still be assessed against actual joint condition, tightening and service context.
REDSEAL PRO 110 has no anti-stick surface treatment. After time in service in a water system, the swollen material will bond more firmly to the mating faces than a treated gasket would. Removal at the next service interval may require more care because the material can bond more firmly to the face after water exposure.
REDSEAL is designed for water service. The swelling mechanism requires water contact. Using REDSEAL in a dry application, or with a medium other than water, removes the secondary sealing mechanism and leaves only the mechanical compression — at 4.5% compressibility, that is significantly less conformance than a standard fibre gasket provides. In non-water applications, REDSEAL is the wrong material.
REDSEAL's chemically pure cotton cellulose construction means it is REACH and RoHS compliant and suitable for municipal waste disposal at end of life. No special disposal requirements — relevant for projects with strict environmental compliance requirements.
Sizes and packaging
| BSP size | Dimensions (mm) | SKU 25 pcs | SKU 100 pcs |
|---|---|---|---|
| 3/8″ | 14.5 × 9 × 2 mm | B-2014GIF21-25 | B-2014GIF21-100 |
| 1/2″ | 18.5 × 11 × 2 mm | B-2014GIF22-25 | B-2014GIF22-100 |
| 3/4″ Normal | 24 × 18 × 2 mm | B-2014GIF23-25 | B-2014GIF23-100 |
| 3/4″ Special | 24 × 16 × 2 mm | B-2014GIF24-25 | B-2014GIF24-100 |
| 3/4″ Normal | 24 × 14.5 × 2 mm | B-2014GIF24A-25 | B-2014GIF24A-100 |
| 1″ Normal | 30 × 24 × 2 mm | B-2014GIF25-25 | B-2014GIF25-100 |
| 1″ Special | 30 × 21 × 2 mm | B-2014GIF26-25 | B-2014GIF26-100 |
| 1¼″ | 39 × 30 × 2 mm | B-2014GIF27-25 | B-2014GIF27-100 |
| 1½″ | 44.5 × 36 × 2 mm | B-2014GIF28-25 | B-2014GIF28-100 |
| Box set — 400 pcs — 3/8″ to 1″, 7 sizes | B-2014BOX4 | ||
Custom dimensions and non-standard sizes available on request through B2B contact.
REDSEAL PRO 110 is a rigid vulcanised cotton cellulose gasket with strong mechanical properties and potable water approvals in three markets. It is a relevant option where certification, chemical purity and material construction are all part of the specification.
TZW. CRECEP. WRAS. Drinking-water documentation for three markets. Pure vulcanised cotton cellulose — no rubber binder, REACH and RoHS compliant. 47% water absorption that may increase sealing contact after first fill in suitable water-service applications.
For standard heating and general water service, GREENSEAL PRO 180 is usually the simpler first choice. For potable water distribution where the approval and the mechanism both matter — this is where REDSEAL enters the specification.