Limpet I Interior Non-intumescent Steel Fire Protection

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Interior Non-Intumescent Fire Protection for Structural Steel

Product introduction and characteristics

T&H Fire-Shield Limpet I is a lightweight cement-based fire protection coating made by mixing expanded vermiculite, lightweight cement, special binder and specially selected fire protection additives. It is certified in accordance with the structural steel fire protection coating standard GB 14907-2018, with excellent fire protection performance. The main product characteristics are as follows:

• Excellent physical and chemical properties and outstanding durability and stability;
• Fast and convenient application, economical material consumption and high film build;
• Comfortable and safe working environment, with almost no dust generation in the wet application process;
• 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 steel columns, beams, supports, floors and profiled steel decking in steel structures, such as civil steel-framed buildings, TV towers, stadiums, airports, stations, large shopping centres and industrial plants.

Basic physical and chemical data

Colour: grey

Dry density: ≤ 450 kg/m³

Corrosion resistance: non-corrosive

Thermal conductivity: 0.095 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 dedicated bonding coat between the fire protection coating and the anticorrosive steel coating where necessary.

Reinforcing metal mesh: although reinforcing metal mesh was not used in most fire resistance tests to prove that Limpet I

will not detach even in the most severe fires, from the perspective of long-term use, in semi-outdoor applications, or indoor applications where vibration or external impact may occur, reinforcing metal mesh is still recommended to ensure the ideal performance.

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

The mixing ratio shall strictly follow the manufacturer's recommendations for the application conditions. Conventional or continuous mixers may be used; the mixer shall be kept clean and free from residues of the previous batch. The mixing speed of a conventional mixer shall be set to the lowest so that the material is fully mixed. Generally, each 20 kg bag of fire protection coating requires 3 minutes of mixing after water is added; insufficient mixing may cause blockages in the delivery pipes. The spray equipment shall be approved by T&H New Materials. The surface may be smoothed with a trowel, rolled flat, or left with the sprayed finish. Special note: an improper water-to-material ratio may increase the dry film density and the drying shrinkage rate of the dried film, which may cause cracking and detachment of the coating; follow the manufacturer's water mixing ratio recommendations.

Spray thickness: the first spray pass is 7-10 mm; subsequent passes are normally about 12 mm each.

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

Ambient temperature: the application ambient temperature must be above 4 °C and rising;

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 I 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 I application work instruction from T&H.

Packaging

20 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.