STP ShaliProtek 2E 80 MI
A two-pack, moisture-insensitive phenolic epoxy that bonds to green concrete and damp steel at over 85% RH, guarding structures against hot acid and alkali attack.
What is it?
A 2K phenolic, amine-based, self-priming epoxy protective coating at 80% volume solids, engineered to bond over damp concrete, moist metal and under-prepared surfaces where conventional epoxies fail.
Where is it used?
Below-grade and containment structures in aggressive environments: secondary containment, solvent storage, pump pads, trenches, bridge underdecks, piling, and acid or fertiliser plant interiors.
Why use it?
It cures reliably on green concrete and surfaces above 85% RH, then resists 20-30% acid, 25% alkali and service temperatures of 100-120C, cutting the drying delays a standard epoxy demands.
How is it applied?
Mix Component A and B at 3:1 by volume, wait 5 minutes for de-airing, then brush, spray or roller-apply to a blast-cleaned SA 2 1/2 substrate at roughly 7.8-8.0 m2/L per 100 microns DFT.
About STP ShaliProtek 2E 80 MI
On most construction sites, the substrate is rarely bone-dry when the protection schedule says it should be. Freshly cast concrete holds moisture for weeks, below-grade walls sweat, and steel in a humid plant never truly dries out. A conventional epoxy applied to those surfaces blisters, disbonds and fails inspection. ShaliProtek 2E 80 MI from STP is built specifically for that reality: it is a two-component, amine-cured phenolic epoxy that tolerates green concrete, moist metal and relative humidity above 85%, so the crew can coat when the programme allows rather than waiting for a dry window that may never arrive in an Indian monsoon.
Beyond forgiving surface conditions, the coating is a serious chemical barrier. At 80% volume solids it lays down a thick, high-build film that shrugs off splash and spillage of corrosive acids and solvents even at elevated temperature, and its phenolic backbone gives it the heat tolerance ordinary epoxies lack. Space Arc Engineering supplies ShaliProtek 2E 80 MI as an authorised STP channel partner across Delhi NCR and pan-India, pairing the material with the substrate-preparation and application guidance that decides whether a moisture-insensitive coating actually performs on site.
The technical insight
The moisture insensitivity comes from the amine-cured phenolic epoxy chemistry. Standard epoxy-amine systems are disrupted by surface water: the curing reaction competes with, or is displaced by, moisture at the substrate interface, leaving a weakly bonded film that osmotically blisters. A phenolic-modified system is formulated so that the cure proceeds and wets out the surface even in the presence of water and at RH above 85%, which is why 2E 80 MI can be laid on green concrete and moist steel and still reach adhesion of more than 2.6 N/mm2 on concrete and over 8 N/mm2 on metal. The 80% volume solids is the other half of the story: high solids mean the wet film loses little thickness on curing, so a single coat builds meaningful DFT and low VOC (180 g/L). The phenolic crosslink density delivers the dense, tightly-bonded network that resists acid and alkali permeation and holds up to 100-120C dry service, while an AWWA C 210 cathodic disbondment result below 8 mm confirms the barrier stays intact under the disbonding stress of buried, cathodically-protected steel.
Where it is used
- Secondary containment bunds, trenches and pump pads exposed to chemical spillage
- Solvent and chemical storage tank areas requiring a hot-resistant barrier
- Piling and bridge underdecks and other high-exposure below-grade concrete
- Moist steel and concrete structures in acid and alkali fume environments
- Interiors of ammonium sulphate, annealing, acid and fertiliser plants
- Leather processing units and similar corrosive industrial floors
- Anti-carbonation protective coating for reinforced concrete
- Protection of freshly cast green concrete that cannot wait to dry out
Key advantages
- Cures on damp and green concrete, moist metal and surfaces above 85% RH
- Self-priming chemistry that also tolerates under-prepared substrates
- High 80% volume solids builds substantial DFT per coat with low waste
- Excellent resistance to acid and alkali vapours, splash and spillage
- Withstands dry service temperatures of 100-120C, beyond ordinary epoxies
- Low VOC of 180 g/L for reduced fumes in enclosed containment areas
- Strong adhesion: over 2.6 N/mm2 on green concrete, over 8 N/mm2 on metal
- Passes 2000-hour salt spray and keeps cathodic disbondment under 8 mm
Limitations & considerations
- Two-component product with a limited 55-65 minute pot life, so mix only what can be applied in the window
- Steel still needs abrasive blasting to SA 2 1/2, and immersion service demands a white-metal finish; the coating is forgiving of moisture, not of contamination
- Ambient temperature must sit between 15-50C during application, with well-ventilated conditions
- Although self-priming, STP recommends priming with ShaliPrime PUM on concrete and ShaliPrime Zn Ph 60 on metal for best results
- Supplied only in a fixed 20 L unit (15 L A + 5 L B), which suits medium and large jobs more than small patch repairs
- Full chemical and mechanical cure takes 7 days, so containment cannot be commissioned immediately
Selection & best practice
Start by removing all dust, flakes, oil and grease with jet or dry air, then hose the surface with fresh water before abrasive blasting steel to at least SA 2 1/2 per NACE or SSPC guidance; near-white is adequate for non-immersion, white metal for immersion. Stir Component A to a homogeneous mix with a spiral-blade speed drill, add the full pre-weighed Component B at the 3:1 volume ratio, mix again, then wait five minutes for entrapped air to escape. Confirm ambient temperature is 15-50C and the area is well ventilated. Even though the coating is self-priming, prime with ShaliPrime PUM on concrete or ShaliPrime Zn Ph 60 on metal and let the primer dry fully first. Apply by brush, spray or medium-to-short nap squeegee roller, respecting the 55-65 minute pot life and the 10-24 hour recoat window between coats, and allow the full 7-day cure before exposure. Always wear gloves and eye protection; if skin contact occurs, rinse with water and soap rather than solvent.
Specifications
| Chemistry | 2K phenolic, amine-based, self-priming epoxy (moisture insensitive) |
| Colour | Red or Grey |
| Volume solids | 80 +/- 2% |
| Mixing ratio | 3 : 1 (A : B) by volume |
| Theoretical coverage | 7.8-8.0 m2/L at 100 microns DFT (substrate dependent) |
| Pot life | 55-65 minutes at 27C (100 gm mix) |
| Recoat / full cure | Recoat 10-24 hrs; full cure 7 days |
| VOC | 180 g/L |
| Dry service temperature | 100-120C |
| Adhesion | Green concrete > 2.6 N/mm2; metal > 8 N/mm2 (ASTM D 4541) |
| Pack size / shelf life | 20 L unit (15 L A + 5 L B); 12 months sealed |
Industry use cases
Fertiliser & Chemical Plants
Lines interiors of ammonium sulphate, acid and annealing plants where hot acid and alkali fumes attack concrete and steel, using the coating’s 100-120C tolerance and vapour resistance.
Industrial Secondary Containment
Coats bunds, trenches, pump pads and solvent storage areas so spillage of corrosive chemicals is contained on a dense, low-VOC barrier film.
Bridges & Infrastructure
Protects piling and bridge underdecks and other below-grade concrete that stays damp, providing anti-carbonation cover without waiting for the substrate to dry.
Water & Effluent Structures
Suits buried, cathodically-protected steel and moist concrete, backed by a cathodic disbondment result under 8 mm to AWWA C 210.
Leather & Process Units
Guards floors and structures in leather processing and similar plants exposed to continuous chemical splash at elevated humidity and temperature.
Frequently asked questions
Can ShaliProtek 2E 80 MI really be applied over wet or green concrete?
How is it different from ShaliProtek 2E 65 MI?
What coverage should I plan for?
Does it need a primer if it is self-priming?
What surface preparation does the steel need?
What chemicals and temperatures can the cured film handle?
How we position STP ShaliProtek 2E 80 MI
ShaliProtek 2E 80 MI sits at the moisture-tolerant, high-build end of STP’s protective coatings range. Specify it over the ShaliProtek 2E 65 MI when you need greater film build and chemical barrier per coat; step down to 65 MI where a lighter build is acceptable. Pair it with STP’s own ShaliPrime PUM (concrete) or ShaliPrime Zn Ph 60 (metal) primers for demanding immersion and heavy-chemical service. Where a client’s specification is standardised on Fosroc, the closest equivalent is the Nitocote EP410 chemical-protection system; and for the fairing and blow-hole filling step before any protective coat, Fosroc’s Nitocote VF or an equivalent epoxy putty completes the build-up. Space Arc supplies all of these lines and can help match the right system to the substrate condition on your project.
Fosroc Nitocote EP410 — Choose the Fosroc EP410 when the substrate can be brought to a dry, prepared state and the project is standardised on Fosroc; the STP 2E 80 MI is the better call when concrete is still green or steel stays moist, since EP410 needs a dry surface.
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Authorised distribution, technical advice & professional application across Delhi NCR and Pan-India.