Limpet II Exterior Non-intumescent Steel Fire Protection

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Product introduction and characteristics

T&H Fire Shield Limpet II is a strong, pressure-resistant cement-based special fire protection coating with strong corrosion resistance, made from expanded vermiculite, high-alumina premium cement, special binder and selected fire-retardant additives; it complies with the inspection and certification of the structural steel fire protection coating standard GB 14907-2018, and meets the requirements for special hydrocarbon fire protection products for petrochemical steel structures. Main product characteristics are as follows:

• Excellent physical and chemical performance, capable of withstanding the high-intensity thermal shock of hydrocarbon fires;
• High bond strength, resistance to heat exposure and freeze-thaw, acid/alkali and salt spray, suitable for the most severe C5X environments;
• Outstanding durability and flexibility, without cracking or detachment under external impact;
• No sagging, cracking or hollowing, good compatibility with the topcoat and a reliable appearance;
• Contains no asbestos or other rock wool hazardous substances; green and environmentally friendly.

Product use

Suitable for fire protection of open-air steel structures, buildings or steel structures that remain exposed to the atmosphere after completion, without roof protection against rain and wind, including ordinary cellulosic fires and special hydrocarbon fires; such as facilities and equipment in the petroleum and petrochemical industries, metallurgy and power industries.

Basic physical and chemical data

Colour: grey

Dry density: ≤650 kg/m³

Corrosion resistance: dense, good anti-corrosion

Thermal conductivity: 0.16 W/m·K

Curing type: water-curing

Surface flammability: non-combustible

Smoke emission: no smoke produced

Mildew resistance: no mildew growth

Fire resistance and certification

Compliance

Approval/compliance: CCCF certified by the Fire Product Compliance Assessment Centre of the Ministry of Emergency Management, in accordance with

Application precautions

Substrate type: steel structure

Surface preparation: the substrate must be clean and dry, free of dust, rust, oil, laitance, incompatible primers and other possible

Media affecting bond strength may be present. Note: improper surface preparation can cause adhesion failure, leading to detachment, blistering and other hazardous defects.

Primer: compatible with common steel anti-corrosive primers, but considering long-term safety and to avoid

To avoid the influence of certain unforeseeable factors, T&H New Materials recommends spraying a special bonding coat between this fire protection coating and the steel anticorrosive.

Adding metal mesh: although no reinforcing metal mesh was used in most fire resistance tests to prove that Limpet II

will not detach even in the most severe fires, from the perspective of long-term use, when applied outdoors, or indoors where vibration or external impact may exist, reinforcing metal mesh is still recommended to ensure the ideal result.

Material mixing: at the site, add water and stir for spray or trowel application. Add potable-water-grade clean water while stirring,

Mixing ratio shall strictly follow the manufacturer's recommendations under the application conditions; conventional or continuous mixers may be used. The mixer must be kept clean and free of residue from the previous mixing. For conventional mixers, the mixing speed shall be set to the lowest so the material is fully mixed. Normally, each 25 kg bag of fire protection coating requires 3 minutes of mixing after adding water. Insufficient mixing causes problems such as blockage of the delivery pipeline. Spray equipment must be approved by T&H New Materials. The surface may be smoothed with a trowel, flattened with a roller, or the sprayed finish kept as-is. Special note: an inappropriate water mixing ratio tends to raise the dry film density and drying shrinkage of the dried film, which may cause hazardous phenomena such as cracking and detachment; follow the manufacturer's water mixing ratio recommendation.

Spray thickness: depending on the different fire resistance time and fire protection standard requirements of the project, T&H New Materials will recommend the corresponding spray

thickness.

• For details, consult T&H New Materials Co.

Ambient temperature: the application ambient temperature must be above 2 °C and keep an upward trend;

Application is not recommended when the temperature is below 4 °C and falling; the maximum substrate or ambient temperature shall not exceed 50 °C; the substrate temperature shall be at least 2 °C above the dew point.

Quality control: the application process shall strictly follow the application work instruction;

Thickness measurement, insulation efficiency, density and slump tests shall be carried out at the required frequency during application, with data recorded.

Application team: T&H Fire Shield Limpet II must be applied by teams trained by T&H and holding the application qualification certificate issued by T&H

carried out by a qualified application crew. The main equipment used shall be approved by T&H.

• Before application, obtain the detailed T&H Fire Shield Limpet II application work instruction from T&H

Packaging

25 kg/bag

Storage

Keep sealed in a ventilated, cool, dry place away from sources of ignition. Maximum 12 months.

Topcoat

In certain cases, a compatible fire protection topcoat is required. The topcoat improves decoration and protects the fire protection coating, while also effectively preventing the growth of fungi and moss under harsh conditions. For details, consult the T&H technical department.

Environmental impact

• Must not be poured directly into municipal drainage systems, rivers or soil;
• Not readily biodegradable;
• Does not accumulate in aquatic organisms; low adverse effect on aquatic life.

Scope of liability

The information provided in this product data sheet is based on laboratory test results that we consider accurate, and is provided for application guidance only. All recommendations and advice given by T&H on the use of T&H products, whether in technical documents, special consultation or otherwise, are based on information we consider most reliable. Our products and the information provided are intended for users with the necessary knowledge and industrial experience, and it is for these end users to determine whether the products are suitable for their use. T&H cannot control the quality and condition of the substrate, nor the various factors affecting the use of the product. Therefore, T&H accepts no liability for any loss, injury or damage arising from the use of our products or from reliance on this product data sheet (unless otherwise agreed in writing). Data in this product data sheet may be revised as necessary based on practical experience and continued product development. Publication date: August 2021.

Information is subject to the manufacturer's latest version; the manufacturer's latest TDS prevails.
The technical parameters on this page are taken from the product's original manufacturer technical datasheet, the copyright of which belongs to the manufacturer. If a rights holder considers the presentation inappropriate, contact us for verification and handling.