Foundry Coatings Boron Nitride, Refractory & Die Coatings
Steel tools dissolve in molten aluminum. An uncoated ladle, skimmer or thermocouple holder slowly gives its iron to the melt, and aluminum sticks to whatever it wets. A foundry coating puts a thin, non-wetting refractory layer between the metal and the tool, so metal rolls off, the tool lasts and the iron stays out of the casting.
Chelora Chemicals is a foundry coatings supplier and sourcing partner serving aluminum foundries and die casters across the United States. We supply boron nitride coatings, refractory washes and permanent mold die coatings, with a batch COA and SDS on every consignment.
- Product type
- Foundry coatings
- Non-wetting
- Boron nitride · refractory washes
- Mold coatings
- Insulating · lubricating
- Applied to
- Ladles · tools · launders · molds
- Purpose
- Release · protection · Fe pickup control
- Application
- Spray, brush or dip
- Base
- Water-based or solvent-based
- Cure
- Dry fully before metal contact
- Documentation
- Batch COA & SDS
Note: a coating is only as good as its drying. Apply to a clean, preheated tool and let it dry fully. A damp coating on a ladle is a steam hazard.
How a coating protects the tool
A thin refractory layer separates the metal from what it would otherwise attack or stick to.
Why it matters: iron is the impurity most aluminum alloys fight hardest. A tool that adds it to every melt quietly pushes the alloy off specification
What foundry coatings are and do
Foundry coatings are refractory suspensions applied to anything that touches molten aluminum. Boron nitride coatings are the non-wetting standard: molten aluminum does not wet boron nitride, so metal and dross release cleanly. Refractory washes, based on other refractory powders and binders, protect ladles, launders, skimmers and refractories in the same way.
Their two jobs are release — metal and dross do not stick — and protection. Molten aluminum dissolves iron, so an uncoated steel tool both erodes and adds iron to the melt. Permanent mold die coatings are a separate family: insulating coatings control how fast metal freezes in the mold, and lubricating coatings help the casting release.
Choosing a coating
- Ladles, skimmers and tools. Boron nitride or refractory wash for release and iron pickup control.
- Launders and refractories. Non-wetting coatings to stop buildup on ceramic shapes.
- Permanent molds. Insulating die coat for feeding; lubricating die coat for release.
- Base. Water-based for most shop use; solvent-based where fast drying is needed.
Handling character
Coatings must be fully dry before molten metal contact. Damp coating is a steam eruption hazard. Details in the Safety section.
| Parameter | Typical value |
|---|---|
| Refractory base | Boron nitride or other refractory, per grade |
| Solids content | Per grade; dilution per guide |
| Carrier | Water or solvent |
| Application | Spray, brush or dip |
| Service temperature | Per grade |
| Shelf life | Per producer; stir before use |
Important: the figures above are indicative of commercial material and are offered for planning only. The batch certificate of analysis is the governing document.
| Property | Value |
|---|---|
| Physical form | Liquid suspension or paste |
| Non-wetting by Al | Boron nitride grades |
| Iron pickup | Reduced from coated steel tools |
| Die coats | Insulating or lubricating |
| Application | Spray, brush or dip |
| Cure | Dry fully before metal contact |
| Re-coating | Touch up as wear shows |
Characteristics are general for each coating type. Solids content, dilution, service temperature and application method are grade-specific and stated in the producer's data sheet. Treat the table as orientation, not as a specification.
Where foundry coatings are used
On every tool and surface that meets molten aluminum.
Ladles & transfer
Ladle interiors and lips coated so metal pours cleanly and dross releases.
- Boron nitride grades
- Refractory washes
- Re-coat guidance
Skimmers & tools
Skimmers, stirrers, thermocouple holders and plungers kept from dissolving into the melt.
- Iron pickup control
- Fast-drying options
- Dip or spray
Launders & refractories
Non-wetting coatings to stop metal and oxide building up on refractory surfaces.
- Non-wetting grades
- For ceramic shapes
- Batch COA
Permanent molds
Insulating die coats to control solidification and lubricating coats for release.
- Insulating grades
- Lubricating grades
- Application guidance
Graphite parts
Protective coatings for graphite rotors, shafts and crucibles.
- Graphite products
- Oxidation protection
- Trial quantities
Scheduled supply
Foundries consume these every shift, so steady call-off supply matters more than spot price.
- Annual contracts with call-off
- Price held across the contract
- Second source held in reserve
Delivered to US plants and ports
We ship foundry coatings to nominated delivery points across the United States. The regions below are destinations we serve — Chelora Chemicals is a sourcing and supply partner, not a US manufacturer, and does not hold US stock.
Gulf Coast
The largest US chemical cluster, and the usual entry point for bulk consignments.
- Houston & Galveston, TX
- New Orleans & Baton Rouge, LA
- Mobile, AL
Northeast
Container and bulk delivery into the mid-Atlantic and New England manufacturing belt.
- Newark & Elizabeth, NJ
- Philadelphia, PA
- Boston, MA
Southeast
Port-side delivery for the Carolinas, Georgia and Florida processing plants.
- Savannah, GA
- Charleston, SC
- Jacksonville, FL & Norfolk, VA
Midwest & Great Lakes
Inland rail and truck forwarding from the nearest coastal port to the industrial Midwest.
- Chicago, IL
- Detroit, MI
- Cleveland & Columbus, OH
West Coast
Pacific routing for West Coast processors and formulators.
- Los Angeles & Long Beach, CA
- Oakland, CA
- Seattle & Tacoma, WA
Southwest & Mountain
Inland delivery to interior states, forwarded from the Gulf or Pacific gateway.
- Dallas–Fort Worth, TX
- Phoenix, AZ
- Denver, CO
Importing into the United States
A foundry coating is a chemical mixture, so TSCA looks at each component rather than the product name. Under TSCA section 13 the importer of record, or its authorized agent, must certify to US Customs and Border Protection that each shipment either complies with TSCA or is not subject to it. We confirm the Inventory status of every component with the producer and agree in writing who files that certification before the first consignment moves.
Which party carries that duty follows the Incoterm. On FOB, CFR or CIF terms it is usually the US buyer; on DDP terms it can be the seller or its agent. Safety data sheets and labels are supplied to OSHA's updated Hazard Communication Standard, and the grade-specific transport transport documentation is prepared before booking.
| Item | How it works |
|---|---|
| Delivery points | Any nominated US plant, terminal or port of discharge |
| Incoterms quoted | FOB · CFR · CIF · DDP |
| Importer of record | Agreed in writing before the first shipment |
| TSCA certification | Section 13 positive certification filed at entry |
| Documentation | Batch COA, SDS, packing list, certificate of origin |
| Pack formats | Pails, drums or aerosol packs per grade |
Note: regional coverage describes where we deliver, not where we hold inventory. Lead time depends on producer scheduling and ocean transit to your nominated US port — we confirm both in the quotation.
How we supply foundry coatings
Chelora Chemicals is a foundry coatings supplier and sourcing partner, not a manufacturer. We place your order with a qualified producer whose grade fits the surface, the metal and how you apply it.
We start with what is being coated. A ladle, a die and a launder need different coatings, and a mold coating chosen for release will not do the job of one chosen for insulation.
Then how you apply it. Spray, brush or dip, water-based or solvent-based, and how fast it has to be back in service decide the grade as much as the refractory inside it.
- Coating matched to the surface. Tools, ladles, launders and molds each get the right type.
- Water-based and solvent-based grades. Chosen for your drying time and ventilation.
- Application guidance with the grade. Dilution, surface preparation and drying.
- Iron pickup addressed. Coating steel tools is the cheapest iron control you have.
- Trial quantities before a contract. Prove release and life on your own tools.
- Batch traceability to the producing plant. COA and SDS with every lot.
Pails, drums or aerosols
Coatings in sealed pails or drums, and aerosol packs for touch-up, with full documentation.
Sealed pails
Pails for brush and dip application at the work station.
Sealed drums
Drums for spray systems and high-volume use.
Aerosol packs
Aerosol cans for touch-up of tools and small parts, where available.
Small trial packs
Small packs to prove release and life on your tools.
Incoterms to suit you
Quoted on the Incoterm your purchasing team works to.
Scheduled deliveries
Annual volume released against your consumption.
Coatings, drying and molten metal
Foundry coatings are refractory suspensions, and their main hazard is not the coating but moisture: a coating that has not fully dried can cause a violent steam eruption when molten metal meets it. Solvent-based grades add flammability and vapor exposure, and spraying generates mist. The summary below is orientation only; the safety data sheet supplied with your batch is the authoritative document.
Classified hazards
H₂OWet or damp coating meeting molten metal: steam eruption risk.FlamSolvent-based grades: flammable; keep from ignition sources.MistSpray mist: use ventilation and respiratory protection as per SDS.DustDried coating dust when removing old coat: avoid inhalation.SDSGrade-specific GHS classification in the batch SDS.
Dry means dry. Apply coatings to clean, preheated tools and let them dry completely before they touch molten metal; preheating the coated tool drives off the last moisture. For aerosols and solvent-based grades, follow the SDS for ventilation and ignition-source control.
Storage
Store in sealed original containers, indoors, protected from freezing and from excessive heat. Water-based grades must not freeze; solvent-based grades must be kept from ignition sources. Stir or shake before use, since refractory solids settle.
Handling
Clean the surface, preheat the tool as the data sheet directs, apply by spray, brush or dip, and dry fully before use. Use ventilation and the PPE in the SDS, especially when spraying. Re-coat when wear appears.
Transport
Water-based coatings generally ship as non-dangerous goods; solvent-based grades and aerosols may be classified as flammable. We confirm and document the classification for your grade, packaging and destination before booking.
Every batch, documented
We verify documentation before dispatch so there are no surprises at your incoming-goods bench.
Specification agreed
Alloy family, melt temperature, application method and the grade chemistry confirmed against your process before the order is placed.
Producer batch testing
The producing plant tests each batch against the agreed specification before release.
Documentation review
COA, SDS, TSCA position and transport classification checked by our desk before the shipment is booked.
Traceable dispatch
Each shipment is traceable to its producing batch, with full chain-of-custody records on request.
Why coating steel tools is iron control
Molten aluminum dissolves iron. Leave a bare steel ladle, skimmer or stirrer in the melt and it slowly goes into solution, and the iron goes into your alloy. In most aluminum alloys iron is an impurity to be kept down, because it forms brittle intermetallic phases that cost ductility.
A non-wetting coating breaks that contact. Boron nitride, which molten aluminum does not wet, is the standard; refractory washes do the same job on many tools. The coated tool lasts longer and stops feeding iron into every melt it touches.
That makes coating one of the cheapest forms of chemistry control in the foundry. It costs a few minutes and a little coating per tool, and it protects an alloy specification that is far more expensive to correct after the fact.
We do not publish operating process parameters here; this is background only. Full technical documentation accompanies every shipment, and any process-specific detail you need is best confirmed directly with our technical desk.
| Product family | Foundry coatings |
|---|---|
| Non-wetting | Boron nitride · refractory washes |
| Mold coatings | Insulating · lubricating |
| Purpose | Release · protection · Fe control |
| Application | Spray, brush or dip |
| Before use | Dry fully |
Related foundry & melt-treatment products
Molten metal handling and treatment products supplied from the same desk.
Foundry coatings, answered
What are foundry coatings used for?
Why use boron nitride coatings?
Why do steel tools need coating?
What are permanent mold die coatings?
How are foundry coatings applied?
Water-based or solvent-based?
Can coatings be used on refractories and graphite?
What is the main safety risk?
How should coatings be stored?
Do you manufacture foundry coatings?
Get a quote on foundry coatings
Tell us what you coat, how you apply it and how fast it has to be back in service. We will match a grade and quote trial quantities.