Two-component cementitious coating for concrete where waterproofing, traffic resistance, chloride protection, and dependable bond to difficult substrates must be handled in one specified material.
Decision Summary
Core Uses
CEM-KOTE BARRIER COTE 100 is used as a bonding agent for highly contaminated substrates, including oil-contaminated concrete. It is applied to properly prepared, saturated surface-dry concrete to create a durable cementitious interface before subsequent repair or protection materials.
The product is suitable as a heavy-duty, high-impact traffic coating for new concrete and resurfacing of parking garages, industrial floors, loading docks, and similar areas. Standard application is two coats at 30 mils each, for a total thickness of 60 mils / 1.6 mm.
CEM-KOTE BARRIER COTE 100 can be used for positive- and negative-side waterproofing and as a chemically protective cementitious coating. Official Gemite data identifies resistance to concentrated salt solutions and alkalis, with continuous water immersion possible after proper curing.
Comparison Block
Technical Data Table
| Property | Value | Source / test |
|---|---|---|
| System type | Two-component: dry Component A + liquid Component B | Official product description |
| Component A packaging | 50 lb / 22.7 kg bag | Product data sheet |
| Component B packaging | 1.8 gal / 6.8 L unit | Product data sheet |
| Standard coating coverage | 100 ft2 at 60 mils per kit / 8.7 m2 at 1.6 mm per kit | Two 30 mil coats |
| Bonding agent yield | Approx. 200 ft2 / 20 m2 per kit | Actual yield depends on substrate |
| Modulus of rupture | 1570-1710 psi / 10.8-11.8 MPa | ASTM C438 |
| Ultimate tensile strength | 680-770 psi / 4.7-5.3 MPa | ASTM D412 Modified |
| Compressive strength | 6380-6610 psi / 44-45.6 MPa | ASTM C109 |
| Freeze-thaw resistance | 0% weight loss after 300 cycles | ASTM C666, Procedure A |
| Direct tension bond | 170-350 psi / 1.2-2.4 MPa | Failure in concrete substrate |
| Chloride penetration | No chloride penetration | AASHTO T259 |
| Rapid chloride permeability | 300-400 coulombs | AASHTO T277 |
| Color | Light grey | Product data sheet |
| VOC content | 0 g/L | U.S. product data sheet |
| Shelf life | 12 months | Stored on pallets in a dry, cool area |
Application / Specification Notes
Prepare concrete in accordance with ICRI Guideline 310.2. Mechanically roughen or high-pressure water-jet the substrate, typically at 5000 psi / 34.5 MPa minimum water pressure, to achieve ICRI CSP-4 or higher. Remove unsound concrete and provide a profiled, porous, structurally sound surface free of dust, grease, oil, dirt, curing compounds, release agents, coatings, and other bond-inhibiting materials. Sanding, power-washing, grinding, and wire-brushing are not approved preparation methods in the product data sheet.
Pre-saturate concrete for two hours before installation. Apply to saturated surface-dry concrete with no standing water.
Use a clean mortar mixer or a heavy-duty, high-torque, low-speed drill at 400-600 rpm with a suitable paddle. Pour the liquid Component B into the mixing container, then gradually add dry Component A while mixing until smooth and lump-free.
Apply by spray, trowel, or brush at 30 mils / 0.76 mm per coat. Standard system thickness is two coats totaling 60 mils / 1.6 mm. When spraying, brush each coat to reduce pinhole risk. Apply the second coat after the first coat has taken initial set but before it has dried.
Use REINFORCING FABRIC HD over cracks or throughout where required by the project. REINFORCING FABRIC NW is used only over cracks on elevated slabs. Embed fabric fully into the first coat and cover with the second coat. Fabric must maintain full substrate contact, without air pockets, and must not protrude through the surface. Minimum applied thickness with REINFORCING FABRIC HD is 80 mils / 2 mm.
Air dry for a minimum of three days before continuous water exposure or before applying non-breathable coatings such as urethane or epoxy. Protect fresh applications from rain, strong wind, and intense sunlight for 12 hours.
Do not apply when temperature is expected to fall below 45 F / 7 C within 48 hours or when rain is imminent. Use hot-weather concreting procedures above 77 F / 25 C. Do not apply above 95 F / 35 C. Protect Component B from freezing. Do not bridge moving cracks. Continue existing control and expansion joints through the coating. Avoid steel-wheeled traffic and high point loading in thin applications.
System Compatibility / Related Product Notes
Dynamic or moving substrate cracks should be treated before applying CEM-KOTE BARRIER COTE 100. Gemite identifies CEM-KOTE FLEX ST reinforced with REINFORCING FABRIC HD or REINFORCING FABRIC NW as the treatment method for moving cracks.
In Gemite wastewater protection System #2 for closed structures with hydrogen sulphide exposure between 20 and 50 ppm, CEM-KOTE BARRIER COTE 100 is specified as the first coat at minimum 40 mils / 1 mm, followed by CEM-KOTE FLEX CR at minimum 40 mils / 1 mm.
REINFORCING FABRIC HD may be used over cracks or throughout the surface, depending on project requirements. REINFORCING FABRIC NW is identified for cracks on elevated slabs. Fabric must be fully embedded and fully covered.
Gemite notes that in some instances cracks can be routed out and filled with FIBRE-PATCH OV before CEM-KOTE BARRIER COTE 100 application.
For some chemical protection assemblies, Gemite identifies CEM-KOTE BARRIER COTE 100 as the first coat used to reduce moisture transfer before application of 100% solids epoxy protection.
FAQ
Yes. Gemite identifies CEM-KOTE BARRIER COTE 100 as a bonding agent for highly contaminated substrates, including oil-contaminated concrete. The substrate still requires approved mechanical preparation and must be structurally sound.
It is both. The official data sheet describes it as a waterproofing coating and as a heavy-duty, high-impact traffic coating for areas such as parking garages, industrial floors, and loading docks.
For standard coating use, specify two coats at 30 mils / 0.76 mm each, totaling 60 mils / 1.6 mm. Where REINFORCING FABRIC HD is included, the minimum applied thickness is 80 mils / 2 mm.
Yes, but observe cure requirements. Gemite states a minimum three-day air cure at 75 F / 23.9 C before most standard coatings or epoxy overlays, and 28 days before urethane overlays unless an epoxy or suitable primer is used or the coating manufacturer recommends otherwise.
No. The data sheet states not to bridge moving cracks with CEM-KOTE BARRIER COTE 100. Dynamic cracks should be treated with CEM-KOTE FLEX ST reinforced with REINFORCING FABRIC HD or REINFORCING FABRIC NW before application.
Send the substrate condition, exposure, traffic, crack profile, and coating sequence. Gemite can help confirm whether this product fits the project conditions.
Request Technical GuidanceOr contact us: office@gemite.tech · +40 232 273 031
Română