Overview
ZC-891 is a low-viscosity, unpromoted bisphenol A epoxy vinyl ester resin. As one of the recommended international brand products in our resin range, this resin is supplied with supply chain resource support for formulators sourcing a corrosion-resistant vinyl ester resin for resin concrete, mortar, and FRP lining applications.
This resin offers excellent chemical corrosion resistance (comparable to the corrosion-resistance performance of grade 854), good wetting and compatibility with fillers, high adhesion to carbon steel and concrete substrates, good weather resistance including UV resistance, and low shrinkage. It is suitable for resin concrete such as monolithic resin electrolytic cells, seamless monolithic resin mortar flooring, mortar preparation for brick and tile lining adhesive mastic and joint grouting materials, corrosion-resistant FRP linings and molded sheets, and other corrosion-resistant resin processes.
Specification of ZC-891
| Appearance | Transparent light brownish-yellow liquid |
| Viscosity | 0.25 ± 0.10 Pa·s |
| Acid value | 10 ± 3 mg KOH/g |
| Solids content | 55 ± 3 % |
| Gel time | 25 ± 5 min |
| Stability | 3 months in a dark place |
Viscosity and solids content measured per GB/T 7193-2008. Acid value measured per GB/T 2895-2008. Gel time measured per GB/T 7193-2008 at 25°C.
Resin Concrete, Mortar and Mastic Properties
| Item | Cast Body | Concrete | Mortar | Mastic |
| Compressive strength, MPa | 130 | 125 | 110 | 105 |
| Tensile strength, MPa | 73 | 10 | 16 | 20 |
| Flexural strength, MPa | 115 | 35 | 39 | 42 |
| Impact resistance, kg·m | – | 1×4 | 1×3 | 1×2 |
| Bond strength to cement, MPa | – | 2.1 | 2.6 | 3.5 |
| Bond strength to steel plate, MPa | – | 2.5 | 2.9 | 3.2 |
| Linear shrinkage, % | 0.015 | 0.005 | 0.007 | 0.010 |
| Water absorption, % | 0.08 | 0.20 | 0.15 | 0.11 |
Why Bond Strength and Water Absorption Matter for ZC-891
Bond strength to cement and steel is one of the key values formulators reference when a resin concrete or mortar system needs to stay adhered under mechanical load and thermal cycling, since a lining or flooring system that loses adhesion at the substrate interface is prone to delamination and premature failure.
With bond strength up to 2.5-3.5 MPa across concrete, mortar and mastic formulations, ZC-891 is positioned for flooring, tank lining and electrolytic cell applications where the resin system must remain bonded to carbon steel or concrete substrates. Because this resin also delivers low water absorption of 0.08-0.20 percent, it retains its mechanical and corrosion-resistant performance in continuously wet or chemically aggressive service, which is relevant for monolithic resin electrolytic cells and chemical containment structures.
What to Consider When Sourcing ZC-891
When sourcing a corrosion-resistant vinyl ester resin for resin concrete, mortar or FRP lining work, formulators typically evaluate bond strength to cement and steel, compressive and flexural strength, and linear shrinkage against the target flooring or lining specification, alongside the resin’s documented chemical resistance range.
Working with a supplier that can provide consistent documentation and responsive technical support can help reduce qualification time when approving a new resin grade for a production line. Because gel time and curing behavior are tested under specific catalyst and temperature conditions, buyers should confirm these process parameters against their own mixing and curing setup before finalizing a formulation schedule.
Curing System and Fabrication Considerations
ZC-891 is typically cured using a 9% MEKP initiator and 0.6% cobalt accelerator system. The table below is for reference only; fabricators should run a small trial batch to confirm gel time and cure behavior under their own shop temperature before scheduling a full production run.
| Accelerator, % (0.6% Cobalt) | Initiator, % (9% MEKP) | Temperature, °C | Gel Time, min |
| 2 | 2.0 | 15-20 | 30-40 |
| 4 | 2.0 | 15-20 | 25-35 |
| 2 | 2.0 | 20-25 | 25-35 |
| 4 | 2.0 | 20-25 | 20-30 |
| 2 | 2.0 | 25-30 | 20-25 |
| 4 | 2.0 | 25-30 | 15-20 |
For applications in high-humidity or low-temperature environments, an appropriate amount of DMA (dimethylaniline) can be added to the above curing system, or a BPO (benzoyl peroxide) plus DMA curing system can be used to adjust suitability. For FRP fabrication in alkali-resistant service or other highly corrosive conditions, post-curing treatment should be carried out.
Corrosion Resistance Reference
ZC-891 shows good resistance across a range of acid, alkali and salt media. A selection of tested conditions is shown below; contact our team for the full corrosion-resistance data set for your specific service medium.
| Chemical Medium | Concentration, % | Temperature, °C |
| Sulfuric acid | 70 | 70 |
| Hydrochloric acid | 32 | 65 |
| Nitric acid | 35 | 40 |
| Sodium hydroxide | 10 | 75 |
| Sodium hydroxide | 50 | 85 |
| Sodium hypochlorite | 15 | 65 |
| Seawater | – | 90 |
General Handling and Storage Guidance
ZC-891 contains styrene monomer, which is irritating and toxic. Avoid direct contact with skin and eyes, keep the workplace well ventilated, and wear protective work clothing and masks. Keep away from fire sources during storage and use. If contact with eyes or skin occurs, rinse immediately with clean water and seek medical assistance.
Store the product in its original, tightly sealed container in a dry, dark place, and use within the stated stability of 3 months. Shelf life and specific storage recommendations vary by batch and packaging format, so formulators should always confirm current shelf life, recommended storage conditions, and handling precautions against the latest technical data sheet and SDS for the specific batch of ZC-891 they are working with.
Where to Source This Product
Thousands Chemicals connects formulators with ZC-891 and related resin products through our digital B2B marketplace. Corrosion resistance and material performance for resin concrete and lining systems are commonly evaluated using guidance published by organizations such as AMPP (the Association for Materials Protection and Performance). Our team can help confirm packaging, lead times, and technical documentation for your target application and order volume.
Documentation We Can Provide
For buyers evaluating this resin for a new resin concrete, mortar flooring, or corrosion-resistant lining project, our team can help arrange the current technical data sheet and safety data sheet. Having this documentation in hand before finalizing a formulation can help avoid delays later in your qualification or approval process.
FAQ
What is ZC-891 used for?
It is used for resin concrete such as monolithic resin electrolytic cells, seamless monolithic resin mortar flooring, mortar for brick and tile lining adhesive mastic and joint grouting materials, and corrosion-resistant FRP linings and molded sheets.
Is ZC-891 promoted or unpromoted?
ZC-891 is an unpromoted resin, meaning the accelerator (typically cobalt) needs to be added by the fabricator as part of the curing system, alongside the MEKP initiator.
What is the bond strength of ZC-891 to steel and concrete?
Bond strength to cement ranges from 2.1-3.5 MPa and bond strength to steel plate ranges from 2.5-3.2 MPa, depending on whether the formulation is concrete, mortar, or mastic.
Can you provide technical documentation and bulk pricing?
Yes, technical data sheets and SDS documentation are available on request, and our team can provide bulk pricing and lead times based on your target volume and delivery location.
Get a Quote for ZC-891
Contact our team for a quote, technical data sheet, or SDS for this low-viscosity epoxy vinyl ester resin. We support bulk supply and global shipping for formulators sourcing ZC-891 for resin concrete, mortar flooring, and corrosion-resistant FRP lining applications.
