TECTULby IMR

Fluid conveyance · Pipe sealing and jointing

TECHNICAL DATA SHEET

FT-TC-SEL-ETERNA-001

Issue date: August 4, 2026 · Rev. 001

Eterna A-53 sealant for threaded galvanized and copper pipe — ETERNA S.A. chloroprene-phenolic base

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Eterna A-53 sealant is an industrial sealing adhesive from the Colombian brand ETERNA S.A., made from a chloroprene polymer modified with phenolic resins, formulated specifically for threaded joints on galvanized and copper pipe — even threads with a defective bite, thanks to its adhesive action rather than a purely mechanical seal. This sheet gathers the physicochemical characteristics published in the manufacturer's current data sheet (code MEN-012, valid from 30-Nov-2015): density of 0.919 g/cc, viscosity of 1600 cP ± 150 at 20 °C measured under NTC 1984, 19 % ± 1 solids concentration, tan color in the container and ivory once applied. It is applied on pipes carrying water, oils, aliphatic solvents, water vapor and combustible gases (propane and butane); the manufacturer expressly excludes PVC, polyethylene, petroleum-derived fuels, aromatic solvents and high-concentration acids or alkalis. The sheet also details the surface preparation and thread application sequence, the practical difference versus PTFE tape, material and fluid compatibility, and the storage and safety conditions (Class 3 flammable product) declared by ETERNA S.A.

SKU VT-58698 (variant VT-58698-01 · 375 mL) · single commercial presentation published by TECTUL · ETERNA S.A. factory documents a 1/8-gallon can and a 3600 cc tin · sold by the unit

1. Technical specifications

Physicochemical characteristics (ETERNA S.A. sheet MEN-012)

ETERNA S.A.'s current data sheet (MEN-012, revision 01) does not publish a tack-free time in minutes, a total cure time in hours, a service temperature range or a numeric flash point: it defines the re-threading point by a tactile criterion ("once the surface is dry to the touch") rather than a fixed timer. Those figures are confirmed on quotation or directly with the manufacturer — see confirmarAlCotizar.

TECTUL catalog commercial data

This is the only active presentation in the TECTUL catalog; availability is confirmed on quotation. ETERNA S.A.'s factory sheet additionally documents a 1/8-gallon can (≈ 473 mL) and a 3600 cc tin (≈ 0.95 US gal); the exact relationship between TECTUL's 375 mL bottle and those two factory presentations is not published and is confirmed on quotation.

General specifications

2. Application on pipe and threaded joints

Application sequence declared by the manufacturer

1. Surface preparation: the pipe thread must be dry and free of dust, grease and rust particles. ETERNA S.A. suggests brushing the thread before applying the sealant.
2. Application: Sellador A-53 is applied on the pipe thread in a layer of uniform thickness — no thickness in millimeters is specified, only a continuous, even coat over the entire thread.
3. Check before assembly: the fitting is positioned and threaded once the pipe surface is dry to the touch. The manufacturer does not publish a fixed time in minutes to reach that point: it is a tactile criterion, not a timer, and depends on temperature, humidity and the thickness of the applied layer.
4. Rest before service: once the joint is assembled, the parts must be left to rest, away from heat, sunlight and excessive stress, so the adhesive develops all of its properties before entering service.

Consumption per joint varies with pipe diameter, thread depth and the amount of sealant deposited — the manufacturer does not declare a fixed coverage figure per container.

When to specify A-53 versus PTFE tape

The difference is not one of quality but of mechanism: A-53 is a sealing adhesive that fills and bonds the thread flank, which is why ETERNA S.A. recommends it even on threads with a defective bite; PTFE tape is a mechanical interference seal, not an adhesive, intended for sound NPT threads that may need to be disassembled later. Short rule: if the joint must remain serviceable for future maintenance, or if the pipe material is not galvanized steel or copper (for example PVC or polyethylene, where A-53 is not recommended), specify tape or a thread sealing paste instead of A-53. If the joint is permanent, on galvanized or copper pipe, and there is a risk of an imperfect thread bite, A-53 is the manufacturer-declared option. The two products are not mixed on the same thread unless explicitly indicated, because each seals by a different mechanism.

3. Material and fluid compatibility

Pipe materials

Service fluids

The manufacturer's sheet does not publish a numeric service temperature range for the above conditions; confirmed on quotation.

Storage and safety

• Store under roof, in a dry, cool, well-ventilated place, protected from sunlight and contamination.
• Shelf life of 12 months from the production date; check that date before use.
• Keep the container closed to prevent solvent evaporation; stir or mix well after prolonged rest.
• Highly flammable product, Class 3 — extinguish with class B/C fire-fighting equipment.
• Produces neurotoxic vapors: avoid prolonged skin contact and use adequate eye and respiratory protection during application.
• On skin contact, wash with plenty of water; on eye or mucosa contact, or if ingested, consult a physician immediately.

4. Frequently asked questions

What is Eterna A-53 sealant used for?

It seals threaded joints on galvanized and copper pipe, preventing fluid leaks even when the thread has a defective bite. It is a chloroprene-phenolic sealing adhesive, not a purely mechanical sealant: on curing it fills and bonds the thread flank.

How long does Eterna A-53 take to dry?

ETERNA S.A.'s current data sheet does not publish a time in minutes: the factory criterion is tactile — the fitting is threaded once the pipe surface is dry to the touch, and the joint is then left to rest, away from heat and sunlight, before entering service, so the adhesive develops all of its properties. The exact time to reach that point depends on temperature, humidity and coat thickness, and is confirmed on quotation.

Is it suitable for hot water or for gasoline?

Yes for water, including water vapor: the manufacturer declares use on pipes carrying water and water vapor. Not for gasoline: ETERNA S.A. expressly excludes conveyance of petroleum-derived fuels, and the uncured sealant is also soluble in solvents such as aromatic hydrocarbons — it is not specified for that application.

What presentations does Eterna A-53 come in?

TECTUL currently sells the 375 mL presentation (SKU VT-58698-01). ETERNA S.A.'s factory sheet additionally documents a 1/8-gallon can and a 3600 cc tin as manufacturer catalog presentations; specific availability is confirmed on quotation.

Can Eterna A-53 be painted once applied?

ETERNA S.A.'s current data sheet (MEN-012) does not include a paint compatibility specification; that detail is confirmed directly with the manufacturer or on quotation before defining a painted finish over the sealed joint.

How is it applied on a pipe thread?

Clean and dry the thread of dust, grease and rust (brushing is suggested), apply the sealant over the thread in a layer of uniform thickness, thread the fitting once the surface is dry to the touch, and let the joint rest away from heat and sunlight before it enters service.

5. Application notes

6. Technical notice and limitation of liability