CHEMCRETE MD (G)
High-strength, self-smoothing hybrid polyurethane flooring system
Product Description
Chemcrete MD is a 4-part, hybrid polyurethane concrete Resinous flooring system with a smooth and seamless matt surface finish. It offers an. aesthetically pleasing, textured surface providing good slip resistance, and is specifically installed at a 3 to 6 mm thickness. Chemcrete floors are known for their high chemical, abrasion, and impact resistance.
Uses
- Generally used in dry/wet areas such as food or pharmaceutical processing plants.
- Chemical and fertilizer plants, laboratories, and clean rooms.
- Heavy engineering and automobile workshops, warehouses.
- Beverage bottling plants
- Restaurant kitchens
Chemical Resistance
Outstanding chemical resistance is observed against a wide range of materials like;
- Strong inorganic acids like sulphuric acid (<35%), Hydrochloric acid (<35%), and phosphoric acid (<50%).
- Strong organic acids commonly encountered in food processing industries like Acetic acid (<30%), citric acid, Formic acid, Uric acid, oleic acid, and Lactic acid.
- Strong alkali solutions like Potassium hydroxide (<50%), sodium hydroxide (<50%), etc.
- Diesel, Petrol (gasoline), Mineral oils, etc.
- Vegetable oils, Hydrogenated vegetable oils, Fats, Glucose, Sucrose, etc.
- Sanitization chemicals like sodium hypochlorite solution, detergent solutions, etc.
- Commonly used solvents like ethyl alcohol, IPA, xylene, and various Amines.
- A detailed but non-exhaustive list of chemicals. to which chemcrete is resistant is available upon request.
Product Data
| Appearance / colour: | Chemcrete MD [R] Resin | Milky white liquid |
| Chemcrete MD [H] Hardener | Brownish liquid | |
| Chemcrete Aggregates | Whitish Powder | |
| Chemcrete pigment | Coloured paste |
Storage Conditions/Shelf Life
12 months from the manufacturing date if stored properly in undamaged seal packaging at a temperature between 5°C-30°C. It should be kept in a cool, well-ventilated area, away from heat, direct sunlight, sparks, and children.
Salient Features
- Excellent chemical resistance to a wide range of organic and inorganic acids, alkalis, amines, salts, and solvents.
- Excellent bond strength.
- Low odour, VOC-free.
- Hygienic. Resists growth of a wide array of pathogens, bacteria, and fungi.
- High mechanical impact resistance. It has a plastic nature due to which it will deform but will not crack or debond even under heavy impact.
- Good slip resistance.
- High abrasion resistance due to scientifically selected materials. aggregates.
- Easy to clean and sterilise. It can resist cleaning temperatures of 80°C @ 6mm and 60°C @ 3mm.
- Fast one-step application.
- It can be applied to substrates with high moisture content (5-day-old concrete).
Technical Profile
| Property | Test Method | Value and Unit |
|---|---|---|
| Mixing Ratio | NA | Pre weighed kit to cover:1) 3.5 sq.m area @ 3mm2) 2.65 sq.m area @ 4mm3) 1.75 sq.m area @ 6mm |
| Finish | CPI* 1001 | Non porous, matt |
| Pot Life | ||
| @ 10°C | CPI 1002 | ~35 min |
| @ 20°C | CPI 1002 | ~24 min |
| @ 35°C | CPI 1002 | ~14 min |
| Curing time | ||
| Surface Dry @ 35°C | CPI 1002 | ~12 hours |
| Hard Dry [Open for foot traffic] @ 35°C | CPI 1002 | ~18 hours |
| Full Cure [Vehicular Movement] @ 35°C | CPI 1002 | ~3–4 days |
| Coverage | CPI 1010 | 1.9 Kg / (m²) / mm |
Mechanical Properties
| Property | Test Method | Value and Unit |
|---|---|---|
| Compressive Strength | ASTM C 579 | >500 Kg/cm² |
| Flexural Strength | ASTM C 580 | >200 Kg/cm² |
| Tensile Strength | ASTM C 307 | >90 Kg/cm² |
| Pull off Adhesion Test | ASTM D 4541 | Concrete Failure @ 18 Kg/cm² |
| Abrasion Resistance [Taber] | ADTM D 4060 | 45 mg loss |
| Shore Hardness | ASTM D 2240 | D 80 |
| Shelf Life | – | 12 months in the original unopened container when stored between 5–40°C |
| Surface spread of flame | Bs476 Part 7 | Class 2 |
| Coefficient of thermal expansion | (ASTM C531) | 3.6×10⁻⁵/°C |
| Service temperature | CPI1984 | -15 to 60°C @ 2mm-20 to 80°C @ 6mm |
Method of Application
All Chemsol Products are recommended to be applied only by Approved Applicators and should be handled after using proper PPEs like Gloves, mask, goggles, etc
Application conditions
Substrate temperature: 10-40°C
Substrate moisture content: Chemcrete can even be applied on substrates with high moisture content, like 6-day-old concrete, but ensure that the water is not ponded on the surface.
Relative humidity: 8o%max
Note: The substrate temperature must be at least 3 °C above the prevalent dew point temperature to reduce chances of condensation on the floor.
Substrate Quality
Ensure that the concrete substrate has a minimum compressive strength of 250kg/cm². The CDS (clean, dry, sound) test must be conducted before application of primer/scratch coat to the concrete substrate. The substrate must be free of all contaminants such as dirt, oil, grease, coatings, and surface treatments, etc. Consider applying a test area if necessary.
Substrate Preparation
Mechanically prepare the concrete substrate to achieve a concrete surface profile between 4-6. This will also aid in removing weak concrete and cement laitance. Suitably established methods like scarification, grinding, abrasive shot blasting, etc., should be employed to achieve the same. Fully expose the blowholes and voids and repair them using appropriate products like Chemprime, Chemseal, etc. Remove oils, grease, wax, etc. by using detergent, low-pressure water, steam, or suitable chemicals, as they create a hindrance in developing a strong bond between the concrete and Chemcrete MD. Prime the surface with a 1mm scratch coat of Chemcrete MD. Priming can also be done with Chemcrete LV primer or Chembase 150. Your Chemsol solutions expert will choose the suitable primer depending on the substrate condition. Identify and treat the expansion joints properly. Refer the method statement for doing the same.
Mixing
Pour Chemcrete MD [R] into a 20 lit bucket and add chemcrete pigment paste to it. Stir with a Cowl blade mixer for 1min, now add chemcrete MD [H] and continue stirring for 1 more minute. After this, add chemcrete aggregates and thoroughly mix for 2min. Always mix complete packs, never split packs. Note that chemcrete aggregates are specially formulated reactive materials and their quantity should not be altered to adjust the viscosity for workability. Visually ensure that the mixture has become homogeneous.
Immediately lay the mixture on the floor and spread it with a notch trowel/ pin rake to desired thickness. Use a spike roller immediately (in less than 2min after laying) to deareate the coating. Adhere to the following curing schedule before bringing the floor to service:
Curing Schedule
| Temp. (°C) | Foot traffic | Full cure |
|---|---|---|
| 10°C | 24 hours | 7 Days |
| 20°C | 24 hours | 5 Days |
| 35°C | 16 hours | 4 Days |
Cleaning of Tools
Clean all tools and application equipment with thinner PT 36 immediately after use. Hardened and/or cured material can only be removed mechanically.
Packing
Chemcrete MD is available in pre pre-weighed kit of 20 kg consisting of Resin, Hardener, Aggregates, and pigment paste.
Handling & Safety
Keep the containers tightly sealed when not in use. Avoid skin contact and inhalation of fumes (if any). While spraying, it is advised to wear a mask. If it comes in contact with the body, wash affected parts with plenty of water. In case of persistent irritation, contact a physician.
*Disclaimer: The Information provided is based on our experience, thorough investigations & sophisticated testing methods, but due to the vast number of applications and usage methods, Chemsol Polymer Industries cannot accept responsibility of any kind for any particular result. It is the responsibility of the user to verify the suitability of the product for their end use and in accordance with the rules and regulations of that country /territory. All information provided pertaining to our products should be treated only as a guidance tool without any guarantee or warranty of any sort.
* All CPI test methods are our scientifically designed internal test methods which can be shared upon request.
