Cafco FENDOLITE® MII - Vermiculite Cement Based Wet Mix Spray
INTRODUCTION
Cafco FENDOLITE® MII is a spray applied, single package factory controlled premix, based on vermiculite and Portland cement.
Cafco FENDOLITE® MII produces a monolithic coating able to withstand the thermal shocks experienced in a high intensity hydrocarbon fire. Concrete structures in particular, will be protected from explosive spalling when coated with Cafco FENDOLITE® MII. Although low in density, thus significantly reducing dead load, Cafco FENDOLITE® MII is highly durable and will not crack or spall under mechanical impact.
Cafco FENDOLITE® MII is used for application on construction elements such as concrete or individual steel sections. It is also used extensively for the refurbishment or upgrading of existing tunnel structures.
| Properties and performance |
| Colour and finish |
Off-white, monolithic, spray texture. May be floated or roller finished |
| Minimum practical thickness |
8mm when unreinforced, 15mm when reinforced |
| Theoretical coverage |
62m2/tonne at 25mm thickness |
| Cure |
By hydraulic set |
| Initial set |
2 to 6 hours at 20°C and 50% RH |
| Density (Nominal) |
775kg/m3 ± 15% (when dry and in place) |
| Combustibility |
Non-combustible (Euroclass A1 to BS EN 13501-1: 2007) |
| Smoke generation |
Does not contribute to smoke generation |
| Thermal conductivity |
0.19W/mK at 20°C |
| Corrosion resistance |
Does not promote corrosion of steel. However, a primed substrate is recommended for long term corrosion resistance, particularly when the structure is to be fully exposed to the elements. See Preparation |
| pH value |
12.0 - 12.5 |
| Sound absorption |
Noise reduction coefficient (NRC) 0.35 |
| Fire resistance |
Concrete and steel structures protected with Cafco FENDOLITE® MII have undergone fire resistance tests at approved independent laboratories to recognised standards throughout the world, including:
- UK (BS 476: Parts 20-21: 1987 Appendix D)
- Germany (DIN 4102)
- International Standard ISO 834
- Netherlands, RWS (Fire Test procedures for tunnels GT-98036-1a)
- France, Hydrocarbon Modified HCM
- Italy (UNI 11076)
- USA (ASTM E119, UL263 and UL1709 - Design No. XR719)
The fire resistance test results relate solely to the constructions tested and test conditions imposed. Promat provides computer based thickness calculations to meet specific fire resistance requirements on request
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- Structures protected with Cafco FENDOLITE® MII can provide fire resistance for up to 240 minutes.
- Does not release toxic or hazardous fumes, and presents no known health hazards either before, during or after application.
- The surface may either be spray textured, roller or float finished.
| Preparation |
| Typical substrates |
Concrete and steel |
| Substrate preparation |
The substrate shall be clean, dry and free from visible moisture (including condensation), concrete laitance, formwork release oils, loose millscale, loose rust and any other condition preventing good adhesion
Concrete curing agents should not be used
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| Mesh reinforcement |
Most fire tests conducted have been carried out without mesh reinforcement to demonstrate the ability of Cafco FENDOLITE® MII to stay in place under the most severe fire conditions. However, for maximum long term in service durability, the use of lightweight mesh reinforcement is recommended for exterior work and for interior use where vibration or mechanical damage and the possibility of subsequent de-bonding exist |
| Application |
| Initial steps |
Application of Cafco FENDOLITE® MII must be carried out by an applicator recognised by Promat and applied in accordance with the installation guide available from Promat |
| Methods |
- Mix Cafco FENDOLITE® MII with potable water in a suitable mixer and apply by a spraying machine approved by Promat
- Cafco FENDOLITE® MII may also be float or roller finished or left with a spray texture
- Hand applied patching mix, Cafco FENDOLITE® TG is available for minor repairs. Please refer to product data sheet of Cafco FENDOLITE® TG
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| Limitations |
Cafco FENDOLITE® MII may be applied when the substrate and air temperatures are at least 2ºC and rising, but should not be applied if the substrate or air temperatures are less than 4ºC and falling. Maximum substrate and air temperature is 50ºC
Substrate temperature should be at least 2ºC above dew point temperature
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TOP COATING
Under certain circumstances, top coating systems may be used as protection from frequent wash down, long term chemical spills, or for improved resistance to fungal, algal and bacteria growth. Please refer to Promat Technical Services for advice on compatibility.
PACKAGING
20kg bags.
STORAGE
Off the ground and kept dry until ready for use.
SHELF LIFE
Maximum 12 months.
ENVIRONMENTAL
- Do not discharge into drains, watercourses or soil.
- Not readily biodegradable.
- Not expected to bioaccumulate.
- Not expected to be toxic to aquatic life except at high concentrations.