SILIPORITE® NK 10 AP 4A Molecular Sieve Powder

Name: SILIPORITE® NK 10 AP 4A Molecular Sieve Powder
Brand: Arkema
SKU: siliporite®-nk-10-ap-4a-molecular-sieve-powder-arkema
Price: 9350.00 USD
Availability: InStock

$9,350⁰⁰

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SILIPORITE® NK 10 AP from Arkema is a synthetic Type A zeolite molecular sieve powder supplied in potassium-sodium aluminosilicate form.

With an effective pore opening of approximately 4 angstroms, it functions as a versatile 4A molecular sieve for adsorbing water and other sufficiently small compatible molecules. Its fine powdered form disperses into coatings, sealants, resins and chemical formulations where in-situ moisture control helps reduce foaming, gassing, blistering and other water-related processing defects.

For broader pore-size and molecular-sieve selection guidance, see our Molecular Sieves for Industrial Drying & Purification guide or compare 3A vs. 4A vs. 5A molecular sieves .

Product type: Powdered Type A molecular sieve

Molecular sieve grade: 4A

Effective pore opening: Approximately 4 Å

Primary use: Moisture scavenging in formulations and chemical processes

Manufacturer: Arkema

Where it fits

Polyurethane systems: Moisture scavenging in compatible paints, coatings and sealants where residual water may cause foaming or gassing.
Metallic-pigment paints: Moisture control in formulations containing zinc, aluminum or other water-sensitive metallic pigments.
Low-temperature-cure epoxies: Reduction of residual moisture that may interfere with cure behavior or finished-film quality.
Coatings and sealants: Powder-form drying agent for compatible moisture-sensitive formulations.
Chemical reactions: Adsorption of water from compatible equilibrium reactions to support conversion and process consistency.
Fine-chemical processing: Moisture control in compatible formulations, intermediates and manufacturing processes.
General industrial formulations: Efficient drying where the broader adsorption window of a 4A molecular sieve is appropriate.

Why choose SILIPORITE NK 10 AP?

Approximately 4 Å pore opening: Adsorbs water and other compatible molecules small enough to enter the zeolite pore structure.
High water capacity: Minimum 23 wt.% adsorption at 10% relative humidity and 23°C.
Fine powder form: Supports dispersion into compatible coatings, sealants, resins and chemical formulations.
Controlled particle distribution: No more than 2 wt.% retained on a 20 µm mesh.
Moisture-defect control: Helps reduce foaming, gassing, blistering and other water-related formulation issues.
Broad formulation utility: Suitable for polyurethane, metallic-pigment paint, epoxy and chemical-processing applications identified by Arkema.
Industrial pallet format: Available through Sorbents Direct in 1,000 kg pallet quantities.

Typical specifications

Product name	SILIPORITE® NK 10 AP Powder
Product type	Synthetic Type A zeolite molecular sieve powder
Chemical form	Potassium-sodium aluminosilicate
Molecular sieve grade	4A
Effective pore opening	Approximately 4 Å
Particles retained on 20 µm mesh	≤2.0 wt.%
Water adsorption capacity	≥23 wt.% at 10% RH and 23°C ±2°C
Loss on ignition	≤3.5 wt.% after 1 hour at 950°C
Delta T	≥34°C
Settled density	0.45–0.75
Manufacturer	Arkema

Specifications and typical physical properties are based on Arkema's SILIPORITE NK 10 AP Product Data Sheet. Final acceptance should be based on current manufacturer documentation and the applicable lot-specific COA when available.

How powdered 4A molecular sieve works

Property	Process relevance
Approximately 4 Å pores	Allows water and certain other small compatible molecules to enter the zeolite structure while excluding larger molecules.
Powdered form	Supports direct incorporation into compatible paints, coatings, sealants, epoxies and chemical formulations.
High water capacity	Provides in-situ moisture scavenging under relatively low-humidity conditions.
Controlled particle size	Supports more consistent dispersion and formulation behavior when suitable mixing equipment is used.
Broader adsorption window than 3A	May adsorb some small molecules in addition to water, making application testing important when selectivity is critical.

Why does 4A vs. 3A matter?

Molecular-sieve grade describes pore-size selectivity - not product quality. NK 10 AP uses an approximately 4 Å pore structure, while 3A grades use a smaller approximately 3 Å opening. See our 3A vs. 4A vs. 5A comparison for the broader relationship between the common molecular-sieve grades.

SILIPORITE NK 10 AP vs. NK 30 AP

Selection factor	NK 10 AP	NK 30 AP
Molecular sieve type	4A	3A
Effective pore opening	Approximately 4 Å	Approximately 3 Å
Relative selectivity	Broader adsorption of water and certain other small molecules	More selective for water because many larger molecules are excluded
Published water capacity	≥23 wt.% at 10% RH and 23°C	≥21.5 wt.% at 10% RH and 23°C
Typical starting point	Polyurethane, metallic-pigment paint, epoxy and chemical-reaction applications	Insulating glass and applications where stronger water selectivity or low nitrogen desorption is important

Actual grade selection depends on formulation chemistry, target moisture, other small molecules present, finished-product requirements and process conditions.

Compare SILIPORITE® NK 30 AP 3A Molecular Sieve Powder →

4A molecular sieve powder vs. molecular sieve beads

NK 10 AP and conventional 4A molecular-sieve beads use the same broad pore-size concept but serve very different physical process configurations. Powdered molecular sieve is incorporated directly into compatible formulations, while beads are typically retained inside dryers, vessels or packed adsorption beds through which a gas or liquid stream passes.

Selection factor	NK 10 AP Powder	4A Beads
Physical form	Fine powder	Granular / beaded media
Typical use	Direct incorporation into compatible formulations	Fixed-bed gas or liquid drying
Media recovery	Generally remains incorporated in the formulation	Physically retained inside the adsorption vessel
Primary design variables	Dispersion, loading, formulation chemistry and moisture target	Bed depth, flow, pressure drop, cycle time and regeneration

For a broader explanation of physical form and industrial molecular-sieve selection, see our industrial molecular-sieve drying and purification guide .

Application and trial guidance

Evaluate performance using the actual resin, pigment, solvent, coating, sealant, epoxy or chemical formulation.
Confirm compatibility with viscosity, pot life, cure behavior, adhesion, appearance, gloss and mechanical performance.
Add using suitable mixing and dust-control equipment to achieve uniform dispersion.
Minimize exposure to ambient humidity before and during incorporation into the formulation.
Optimize dosage based on incoming moisture, target residual water, formulation chemistry and process conditions.
For polyurethane systems, verify foam reduction, cure response, adhesion and finished-product properties.
For metallic-pigment paints, evaluate gassing, package stability, pigment compatibility and film appearance.
For low-temperature epoxies, verify cure rate, surface quality, adhesion and long-term performance.
For chemical reactions, evaluate both water removal and possible adsorption of other small process molecules.

Qualification note: Arkema recommends thoroughly testing the product in the proposed application before commercialization. Performance depends on formulation chemistry, dosage, mixing, moisture loading, processing conditions and end-use requirements.

Packaging & availability

Sorbents Direct variant	Configuration
50-bag pallet	50 × 20 kg bags — 1,000 kg total (approximately 2,205 lb)

Ordering format: Palletized quantities only.
Lead time: Typically 2–4 weeks, subject to inventory, quantity and destination.
Freight: Palletized LTL freight calculated at checkout or confirmed by quotation.
Volume discounts: Current automatic quantity discounts are displayed on the product listing.
Larger requirements: Contact Sorbents Direct for recurring pallets, drum quantities, bulk bags or scheduled-release pricing.

Arkema's published standard packaging includes 20 kg bags on a 1,000 kg pallet, 80 kg metallic drums in a 640 kg configuration and 800 kg bulk bags. The current Sorbents Direct listing offers the 1,000 kg bagged pallet.

Storage and handling

Store in the original waterproof packaging in a dry, covered location.
Keep the inner polyethylene liner and outer packaging tightly closed until use.
Reseal partially used bags immediately to reduce atmospheric moisture pickup.
Minimize exposure to humid air during transfer, weighing and formulation.
Use suitable local exhaust ventilation where airborne powder may be generated.
Avoid breathing dust and wear personal protective equipment specified by the current SDS and site risk assessment.
Use clean, dry transfer and mixing equipment.
Protect the powder from liquid water, oils, solvents, dust and foreign contamination.

Important: Active molecular sieve begins adsorbing moisture immediately after exposure to air. Review the current Arkema Safety Data Sheet before handling, transfer, cleanup or disposal.

Why buy from Sorbents Direct?

Sorbents Direct helps industrial buyers evaluate molecular-sieve type, powder form, formulation requirements, package configuration, documentation and freight before ordering.

Industrial pallet quantities for production-scale formulation and chemical-processing requirements.
Manufacturer-backed technical data for product and formulation review.
SDS and TDS support for qualification and workplace documentation.
Lot-specific COA support when available for shipped material.
Application discussion based on formulation chemistry, moisture target, processing method and annual volume.
Transparent pallet pricing and freight support for industrial buyers.

Need another molecular-sieve grade?

Browse the full molecular sieve and zeolite collection for 3A, 4A, 5A, 13X, bead and powder options, or use our industrial molecular-sieve selection guide when the correct pore size or physical form has not yet been determined.

Documentation & technical support

An Arkema Product Data Sheet is available for SILIPORITE NK 10 AP. The applicable Safety Data Sheet and a lot-specific Certificate of Analysis may also be requested when available.

Visit our Documentation Center or contact Sorbents Direct to discuss your formulation, moisture target, processing requirements, pallet quantity and expected annual volume.

Questions & answers

What is SILIPORITE NK 10 AP?

SILIPORITE NK 10 AP is a powdered synthetic Type A zeolite manufactured by Arkema. Its potassium-sodium aluminosilicate structure provides an effective pore opening of approximately 4 angstroms.

Is NK 10 AP a 4A molecular sieve?

Yes. Its approximately 4 Å pore opening allows it to adsorb water and certain other compatible small molecules while excluding larger molecules.

What is its water adsorption capacity?

The Arkema specification lists a minimum water adsorption capacity of 23 wt.% at 10% relative humidity and 23°C ±2°C.

What is the particle size?

The specification permits no more than 2 wt.% of the powder to be retained on a 20 µm mesh, meaning at least approximately 98% passes through that screen under the stated test method.

How is 4A different from 3A molecular sieve powder?

A 4A molecular sieve has a larger pore opening and may adsorb some small molecules in addition to water. A 3A molecular sieve is more selective for water because its smaller pores exclude more compounds. See our 3A vs. 4A vs. 5A molecular-sieve guide for a broader comparison.

What is the difference between molecular sieve powder and beads?

Molecular-sieve powder such as NK 10 AP is designed for direct incorporation into compatible formulations and chemical processes. Molecular-sieve beads are typically retained inside fixed adsorption beds through which a gas or liquid stream passes. The correct physical form depends on the process configuration.

Can it be used in polyurethane systems?

Yes. Arkema identifies polyurethane paints, coatings and sealants as applications for SILIPORITE NK 10 AP.

Can it be used with metallic pigments?

Arkema specifically identifies paints based on metallic pigments such as zinc and aluminum as an application. The complete formulation should be tested for gassing, stability, cure and finished-film performance.

Can it be used in epoxy formulations?

Arkema identifies epoxy resins curing at low temperature as an application. Formulation testing should confirm cure behavior, adhesion, appearance and mechanical properties.

Can it be used in chemical reactions?

Arkema identifies water adsorption in chemical-equilibrium reactions as an application. Suitability and selectivity should be verified using the actual reaction mixture.

What package size is available?

The current Sorbents Direct listing offers a 1,000 kg pallet containing fifty 20 kg bags.

Are smaller quantities available?

This product is currently offered as a palletized 1,000 kg order. Smaller individual bags are not listed at this time. Contact Sorbents Direct if you need an alternative quantity or package configuration reviewed.

What documentation is available?

The Arkema Product Data Sheet and applicable Safety Data Sheet are available. A lot-specific Certificate of Analysis may also be requested when available.