Nepal's construction and hospitality expansion has put fire safety on the agenda in a way it was not a decade ago. New hotels in Kathmandu and Pokhara, renovated trekking lodges along the Annapurna and Everest routes, and expanding commercial buildings in Birgunj and Biratnagar all need treated materials that meet the project's fire rating. The textile units in the Kathmandu valley need treated fabric that meets the buyer's standard. And the polymer units that supply wire and cable insulation need additives that hold up through compounding. Each of these needs fire retardant chemicals — but not the same chemistry, not the same loading, and not the same application method. Innovacorp manufactures and supplies fire retardant chemicals for wood, textiles and polymers in Nepal. The range covers non-halogenated and intumescent grades, and the working conversation starts with your substrate and application, not a generic product list.

Why Fire Retardant Choice Depends on the Substrate

A fire retardant that works well on cotton may not work on polyester. A treatment that works on plywood may not penetrate MDF the same way. A coating that performs on steel may not be suitable for fabric. In Nepal, where plywood treatment in the Kathmandu valley and textile finishing in Birgunj run on different substrates and different equipment, this distinction matters in every enquiry. The reason is that fire retardants work through three different mechanisms, and which mechanism is relevant depends on the substrate and the fire scenario:

• Endothermic degradation: The additive absorbs heat and releases water or other volatiles, cooling the substrate surface. Common in inorganic systems like aluminium hydroxide and magnesium hydroxide.
• Char formation (intumescence): The additive forms a carbonaceous char layer on the surface, which insulates the substrate from heat and limits oxygen access. Common in phosphorus-based and intumescent systems.
• Gas-phase inhibition: The additive releases species that interrupt the flame chemistry in the gas phase. Common in halogenated systems, and in some phosphorus-based systems.

Most commercial fire retardants combine more than one mechanism. The right combination for your application depends on what the substrate is, how it will be treated, and what fire performance the end product must achieve.

Fire Retardant Chemicals We Manufacture & Supply to Nepal

The range is grouped by substrate and mechanism, because that is how selection actually works:

• Wood and plywood treatments: Water-based and solvent-based treatments for plywood, MDF and particle board. Used by the plywood and panel units in the Kathmandu valley and the Terai belt, applied by vacuum-pressure impregnation or brush/roller depending on the treatment facility.
• Textile treatments: Pad-dry-cure treatments for cotton, blends and technical fabrics. Non-halogenated grades are available for Nepal's garment and textile units where halogen-free is a requirement for export orders.
• Polymer additives: Additive concentrates for wire and cable insulation, automotive components and moulded parts. Used by polymer units in the Birgunj and Biratnagar belt. Loading rates depend on the polymer and the target fire performance.
• Intumescent coatings: For structural steel and other substrates where a surface-applied coating is the practical route. Used in hotel construction and commercial projects across Kathmandu and Pokhara. Coating thickness is set by the required fire rating.
• Non-halogenated systems: Phosphorus-based and inorganic systems for applications where halogen-free is specified — increasingly relevant for textile exporters and polymer units supplying European and US customers.

Grade selection depends on your substrate, treatment method and target fire performance. We do not recommend a fixed grade for every application.

How Fire Retardants Work — Three Mechanisms

The technical mechanism matters because it determines which test the product will pass. A few practical notes:

• Char-forming systems are typically evaluated by limiting oxygen index (LOI) and char yield. Higher LOI and denser char usually correlate with better performance in a fire scenario.
• Endothermic systems are evaluated by heat release rate (HRR) and time to ignition. These are common in polymers and wire/cable compounds.
• Gas-phase systems are evaluated by flame spread and smoke density. Halogenated systems are effective but are increasingly restricted in some applications — this is where non-halogenated alternatives come in.

Final test selection depends on the standard your end product must meet. If you have the standard, we can work backwards to the right grade.

Grade Ranges by Substrate

Substrate	Typical Chemistry	Application Method	Typical Add-On
Wood / plywood	Phosphorus-nitrogen	Vacuum-pressure impregnation	8 – 15% dry weight
MDF / particle board	Phosphorus-nitrogen	Impregnation or surface treatment	10 – 18% dry weight
Cotton textiles	Phosphorus-based, non-halogenated	Pad-dry-cure	3 – 8% add-on
Polyester / blends	Phosphorus or halogenated (application-dependent)	Pad-dry-cure or exhaust	2 – 6% add-on
Polymer compounds	Halogenated or non-halogenated (grade-dependent)	Melt compounding	5 – 25% by weight
Structural steel	Intumescent (solvent or water-based)	Spray or brush	Coating thickness per fire rating

Final specification is set against the product TDS for each grade. Actual add-on depends on the substrate and target fire performance. TDS is shared on request.

Loading Rate and Application Method

Fire retardant performance is a function of how much is loaded onto or into the substrate, not just which chemistry is used. As a working reference for Nepal units:

• Plywood impregnation: 8–15% dry add-on by weight is typical for interior applications; higher for exterior or higher fire ratings.
• Textile pad-dry-cure: 3–8% add-on for cotton; 2–6% for polyester blends. Wet pick-up and cure conditions matter as much as the formulation.
• Polymer compounding: 5–25% by weight, depending on the polymer and the target LOI.
• Intumescent coating: Coating thickness is set by the fire rating — for structural steel this is usually specified in the project's fire engineering documents.

These are starting ranges. Final loading is set after a lab trial on your substrate sample, followed by the applicable fire test. Our team works with your technical team on this.

Packing for Plant Loading

• Powders: 25 kg and 50 kg HDPE bags
• Liquids: 5 L, 20 L, 50 L cans and 200 L drums
• Bulk jumbo bags for larger units on request

Pack sizes for a specific plant loading are shared on request.

Regulatory Note

Fire retardant regulations and test standards differ by country and by application. Buyers should check the applicable requirements for their market before finalising a grade. Our team can share product data and test references on request, but the final compliance decision rests with the buyer's local requirements.

Technical Questions from Nepal Buyers

A few questions that come up in almost every technical discussion:

• "Will the treatment change the look or feel of my plywood?" — Water-based wood treatments can raise the grain, which needs a light sanding after drying. The colour of the treated panel may also shift slightly, depending on the chemistry. We flag this before the trial so you can plan.
• "Can I get a halogen-free grade for export orders?" — Yes, for most substrates. Non-halogenated systems are available for wood, textiles and some polymer applications. The trade-off is usually a higher loading rate to achieve the same fire performance.
• "Does the same grade work for Kathmandu plywood units and Birgunj polymer processors?" — No. Wood, textile and polymer substrates use different chemistries and different loading rates, and the grade is set separately for each substrate. Share your substrate and application method and we will work through the grade selection with your technical team.
• "What support is available after the first trial?" — We review your substrate, application method and target fire performance, and recommend the grade and loading range. If a treated product is not passing the required test, call us — we will look at the loading, cure conditions and substrate with your team. TDS and MSDS are shared on request.

Questions Plant Teams Ask

What fire retardant chemicals does Innovacorp manufacture and supply in Nepal?

Innovacorp manufactures and supplies non-halogenated and intumescent fire retardant chemicals for wood, textiles and polymers in Nepal. Grades are selected based on the substrate, application method and the fire performance requirement of the end product.

Can your fire retardants be used for hotels and wooden structures in Nepal?

Yes. Intumescent retardants are used for wood and wood-based panels in hotel and hospitality applications. They form a carbonaceous char layer under heat, which insulates the substrate and limits oxygen access. The specific grade and loading depend on the panel specification and the target fire performance.

What substrates do your fire retardants work on in Nepal?

Our grades cover wood and wood-based panels, textiles (cotton, blends and technical fabrics) and polymers. For each substrate the application method and loading differ, and the final grade is set after a lab trial on a substrate sample. TDS and MSDS are shared on request.

How are fire retardant chemicals packed for a Nepal unit?

Powders are supplied in 25 kg and 50 kg HDPE bags, and liquids in 5 L, 20 L, 50 L cans and 200 L drums. Pack sizes for a specific plant loading are shared on request. TDS and MSDS are provided for each grade.

Start With Your Substrate

Tell us your substrate, the application method you have, and the fire standard your end product must meet. We will suggest the grade and the working loading range for your application — and if you are moving to a non-halogenated system, we can plan the transition with your technical team. For water treatment media used alongside your construction or textile operations, the filter media for WTP and ETP systems in Nepal page covers silica sand, anthracite and activated carbon grades. Call +91-9312871070.