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topic: Heat Resistance

Silicate heat resistant binders and coatings. Our high-performance potassium silicate and lithium silicate products maintain structural integrity at high temperatures, ideal for refractory materials, furnace linings and high-heat coatings.

Potassium Silicate Powder Modulus 2.4-2.5
What is Potassium Silicate Powder (Dry Potassium Silicate Powder / Powder Water Glass) Modulus 2.4-2.5?

Potassium silicate powder, also called dry potassium silicate powder or powder water glass, is a solid powdery inorganic silicate raw material widely utilized in global fine chemical, agricultural, refractory and industrial manufacturing fields. As a high-performance industrial potassium silicate powder, it features stable chemical properties and versatile functional characteristics, becoming an essential foundational material in multiple industrial scenarios.
Sanlee Chemical is a professional potassium silicate powder manufacturer and reliable potassium silicate powder supplier, specializing in the production and supply of high-purity dry potassium silicate powder with stable and standardized chemical indicators.
Our core modulus 2.4-2.5 potassium silicate powder can support customized specifications to meet diverse large-scale production needs of global manufacturers. We provide high-quality potassium silicate in powder form with strict quality control, serving bulk purchasers and industrial processing clients worldwide.
This powder water glass is produced through rigorous processes including high-temperature fusion, precise dehydration, fine grinding and multi-stage impurity filtration. With uniform ultrafine particle size, ultra-low heavy metal and insoluble impurity content, fast water solubility and long-term stable chemical activity, our industrial potassium silicate stands out as a premium raw material for countless industrial production processes.

Introduction to Potassium Silicate Powder

Potassium silicate powder is a free-flowing solid powdery water glass processed by deep dehydration and ultrafine crushing of liquid potassium silicate. This mature potassium silicate in powder form effectively solves the leakage, transportation and storage pain points of liquid water glass, with higher convenience for long-distance transportation and long-term warehouse storage.
Under standard room temperature and atmospheric pressure, it appears as white or off-white fine free-flowing powder, possessing excellent adhesive strength, rapid hardening performance, superior acid resistance, corrosion resistance and high-temperature stability.
Our flagship modulus 2.4-2.5 industrial potassium silicate features a balanced silica-potassium oxide molar ratio, moderate dissolution rate and excellent chemical reactivity. With stable batch quality, high cost performance and flexible packaging solutions, it covers almost all mainstream application scenarios and has won consistent praise from global clients, making us a trustworthy potassium silicate powder manufacturer and supplier for bulk procurement.

CAS Number

CAS No.: 1312-76-1

Chemical Formula

General chemical formula: K₂O·nSiO₂; Our modulus 2.4-2.5 dry potassium silicate powder adopts a precisely calibrated molar ratio of silicon dioxide and potassium oxide. Every production batch maintains uniform molecular structure and stable chemical indicators, completely avoiding product performance fluctuations that affect downstream industrial production.
July 3, 2026
Solid Potassium Silicate Modulus 3.9-4.0
What is Solid Potassium Silicate Modulus 3.9-4.0?

Solid potassium silicate lumps is a high-modulus anhydrous inorganic silicate material with excellent high-temperature stability and bonding properties, widely used in high-end refractory, inorganic coating and welding electrode industries.
Sanlee Chemical is a professional and reliable solid potassium silicate supplier, dedicated to providing high-purity Solid Potassium Silicate Modulus 3.9-4.0 with stable and reliable chemical performance.
Our premium potassium silicate lumps and potassium silicate granules feature high silicon-oxygen ratio and superb physical properties. As a reputable solid potassium silicate supplier, our customized Solid Potassium Silicate Modulus 3.9-4.0 fully meets the strict production standards of high-temperature industrial manufacturing, and our potassium silicate lumps and potassium silicate granules achieve zero difference in batch quality, winning wide recognition from global industrial clients.
This high-modulus solid silicate material is produced through precise high-temperature fusion, constant-temperature curing and professional crushing processes. It features uniform particle morphology, ultra-low impurity content and stable molecular structure, which is a high-quality essential raw material for refractory binders, fireproof coatings and welding rod manufacturing.

Introduction to Solid Potassium Silicate Lumps
Also named solid potassium water glass, potassium silicate lumps is an anhydrous inorganic silicate formed by high-temperature melting and reaction of silica sand and potash without water dilution.
At room temperature, it appears as white or off-white blocky and granular solid. Different from conventional low-modulus potassium silicate, our Solid Potassium Silicate Modulus 3.9-4.0 boasts ultra-high bonding strength, excellent high-temperature fire resistance and stable chemical inertness, adapting to harsh high-temperature working environments.
Our mainstream Solid Potassium Silicate Modulus 3.9-4.0 has a high-standard balanced molar ratio of silica to potassium oxide, with outstanding high-temperature resistance and formula compatibility, perfectly matching the production requirements of refractory materials and inorganic functional coatings. Global manufacturers highly approve our high-modulus solid potassium silicate products for stable batch consistency and superior cost performance.

CAS Number

CAS No.: 1312-76-1

Chemical Formula

General chemical formula: K₂O·nSiO₂; Our Solid Potassium Silicate Modulus 3.9-4.0 adopts precisely calibrated high molar ratio of silicon dioxide to potassium oxide, effectively ensuring stable molecular composition and consistent performance of each production batch of products.

Core Feature Advantages

With unique physical and chemical characteristics, high-modulus anhydrous potassium silicate is perfectly suitable for professional high-temperature industrial application scenarios:
Powerful high-strength bonding capacity: After being dissolved in water, high-modulus solid potassium silicate can form a high-viscosity alkaline binder, which can firmly bond refractory aggregate, mineral powder, inorganic fiber and various industrial fillers, with stronger bonding durability than ordinary low-modulus products.
Excellent high-temperature fireproof performance: It has an ultra-high softening point, non-combustible and excellent heat insulation effect, which is the core raw material for manufacturing high-grade refractory products and inorganic fire retardant coatings.
Stable chemical corrosion resistance: Effectively resists erosion of weak acid, alkali and salt mediums, maintains stable structural performance in harsh industrial environments, and greatly extends the service life of finished products.
Eco-friendly and safe inorganic raw material: No volatile harmful substances, non-toxic and tasteless, harmless to human body and ecological environment, safe for use in building fireproof materials, industrial auxiliary materials and other fields.
July 3, 2026
Solid Potassium Silicate Modulus 3.1-3.3
What is Solid Potassium Silicate Modulus 3.1-3.3?

Solid potassium silicate is a water-soluble anhydrous inorganic silicate solid widely applied across diversified industrial sectors.
Sanlee Chemical acts as a professional solid potassium silicate manufacturer and trusted potassium silicate solid supplier, supplying high-purity industrial anhydrous potassium silicate with steady chemical performance. Our customized solid potassium silicate modulus 3.1-3.3 fully satisfies all kinds of industrial production requirements, and our soluble potassium silicate solid boasts consistent quality across batches.
This solid silicate material is manufactured under precise high-temperature fusion and cooling processes, uniform particle distribution, ultra-low heavy metal impurities and stable molecular structure, serving as a premium raw material for countless industrial production processes.

Introduction to Solid Potassium Silicate

Also named potassium water glass solid, solid potassium silicate is anhydrous potassium silicate formed by melting silica sand and potash at high temperature without adding water solvent.
It presents as white or off-white granular/block solid at ambient temperature, featuring outstanding bonding strength, rapid water solubility, high-temperature fire resistance and chemical inertness.
Our mainstream modulus 3.1-3.3 soluble potassium silicate solid owns balanced silica-potassium oxide molar ratio and fast dissolution rate, compatible with most mainstream industrial formulas. Global manufacturers highly approve our potassium silicate solid for stable batch consistency and competitive cost efficiency.

CAS Number

CAS No.: 1312-76-1

Chemical Formula

General chemical formula: K₂O·nSiO₂; Our solid potassium silicate modulus 3.1-3.3 adopts accurately calibrated molar ratio of silicon dioxide to potassium oxide, maintaining stable molecular composition and uniform performance of every production lot.

Core Feature Advantages

With unique inherent physical and chemical traits, anhydrous potassium silicate fits a wide range of industrial application scenarios:
Powerful bonding capacity: Once dissolved into aqueous solution, soluble potassium silicate solid forms strong alkaline binder that tightly adheres sand, mineral powder, fiber and inorganic fillers.
Superior high-temperature & fireproof performance: High softening point, non-combustible and heat-insulating, ideal for refractory products and inorganic fire retardant materials.
Excellent chemical corrosion resistance: Resists erosion of weak acid, alkali and saline medium, long service life under harsh working conditions.
Eco-friendly non-toxic inorganic raw material: No volatile irritant gas, harmless to human body and ecological environment, safe for agricultural, construction and food-contact auxiliary applications.
July 3, 2026
Solid Sodium Silicate Modulus 3.1-3.3
What is Solid Sodium Silicate?

Solid sodium silicate, also known as solid water glass, is an inorganic silicate compound with the chemical general formula Na₂O·nSiO₂.
It is produced by melting quartz sand (SiO₂) and soda ash (Na₂CO₃) at high temperature, then cooling and crushing into solid lumps, flakes or granules.
Sanlee Chemical as a professional sodium silicate manufacturer and reliable sodium silicate solid supplier, we provide high-purity industrial sodium silicate with stable performance, especially the customized solid sodium silicate modulus 3.1-3.3 that meets diverse industrial production needs.
The appearance of solid sodium silicate is transparent/translucent glassy solid, colorless, light gray or pale green; hard and brittle. It is not soluble in cold water, but slowly dissolves/hydrolyzes in hot water to form liquid sodium silicate solution (liquid water glass)

Introduction to Sodium Silicate Solid

Solid sodium silicate, widely known as solid water glass, is a versatile inorganic silicate compound with the general chemical formula Na₂O·nSiO₂.
It is industrially manufactured by fusing high-purity quartz sand and soda ash at extreme temperatures ranging from 1200℃ to 1400℃, followed by rapid cooling and crushing into hard, brittle, glassy solid lumps or flakes. This anhydrous solid product features adjustable modulus, referring to the variable ratio of silicon dioxide to sodium oxide, which directly dictates its physical and chemical performances for diverse industrial scenarios.
Visually, it appears colorless, translucent or pale gray with stable solid-state properties, boasting longer shelf life and higher concentration compared to liquid sodium silicate. It is insoluble in cold water, ethanol and acidic solutions, but can gradually dissolve and hydrolyze in hot water to form homogeneous alkaline silicate solutions.
Possessing excellent adhesion, heat resistance, acid resistance and fire-retardant properties, solid sodium silicate serves as a fundamental industrial chemical.
It is extensively applied as a high-strength binder for foundry sand molds and refractory materials, a sealing and waterproof agent for concrete construction, and a key raw material for producing liquid water glass, ceramic glazes and industrial detergents. Its stable performance and cost-effectiveness make it an indispensable material in construction, metallurgy, chemical and environmental protection industries.

CAS Number

CAS No.: 1344-09-8

Chemical Formula

General chemical formula: Na₂O·nSiO₂; The specific formula of our solid sodium silicate modulus 3.1-3.3 is matched according to the precise molar ratio of silica and sodium oxide, with stable molecular structure and consistent product batch performance.
June 25, 2026
$What is the heat resistance of potassium silicate? A detailed analysis of temperature tolerance differences between raw material and finished refractory products$
What is the heat resistance of potassium silicate? A detailed analysis of temperature tolerance differences between raw material and finished refractory products
$Refractory materials including fire bricks castables and mortars for high temperature industrial furnaces and kilns$
What is the heat resistance of potassium silicate?
In industries such as fireproof coatings, refractory materials, and high-temperature corrosion-resistant materials, potassium silicate serves as an essential core ingredient. Thanks to its excellent heat resistance of potassium silicate, non-combustibility, and anti-corrosion properties, it is widely used in manufacturing various protective products for high-temperature applications.
Many industry professionals frequently ask a key question when purchasing potassium silicate: exactly how high can potassium silicate withstand temperatures?
The inconsistent industry data on heat resistance of potassium silicate leads to confusion among buyers and difficulty in verifying the authenticity of these claims. Today, we will thoroughly analyze the actual thermal tolerance parameters and the true heat resistance of potassium silicate, clarify the difference in heat resistance between pure raw material and finished refractory products, and address common misconceptions within the industry.
I. Common Industry Controversy: The Difference Between 800°C and 1000°C Heat Resistance
Many professionals in fireproof coatings and refractory materials often wonder why their factory labels potassium silicate with a maximum temperature of 800°C, while other manufacturers claim their products can withstand over 1000°C.
In fact, many customers have observed during production that refractory end products containing potassium silicate can indeed stably endure temperatures exceeding 1000°C. This leads to misunderstandings about the fundamental heat resistance of potassium silicate itself.
The root cause of this controversy lies in the confusion between the performance characteristics of pure potassium silicate raw material and those of composite refractory products incorporating potassium silicate. These two are fundamentally different in terms of heat resistance and should not be conflated.
II. Actual High-Temperature Performance of Pure Potassium Silicate Raw Material
From chemical and physical data, the standard melting point of solid potassium silicate is 976°C—a fixed physical property of pure potassium silicate.
Under normal conditions, pure potassium silicate remains highly stable at temperatures below 800°C, without melting, cracking, failure, or powdering. Its structure remains intact, and protective performance stays consistent, which defines the reliable heat resistance of potassium silicate raw material. This is precisely why we conservatively label its maximum usable temperature at 800°C.
When ambient temperature exceeds 800°C and approaches the melting point of 976°C, the performance of pure potassium silicate begins to degrade significantly, and stability drops sharply.
Additionally, the high-temperature decomposition temperature of potassium silicate varies slightly depending on its modulus, causing minor fluctuations in the upper temperature limit across different grades. However, overall, the practical upper limit of heat resistance of potassium silicate remains around 800°C. Therefore, 800°C represents the true, reliable, and long-term stable upper limit for pure potassium silicate raw material, serving as the most trustworthy baseline reference in the industry.
III. Why Finished Refractory Products Can Withstand Over 1000°C
If pure potassium silicate only reliably withstands up to 800°C, why can fireproof coatings, refractory materials, and high-temperature anti-corrosion coatings containing potassium silicate endure temperatures of 1000°C or higher?
The answer lies in formula modification. In industrial production, pure potassium silicate is never used alone to make refractory products. Instead, it acts as a binding agent combined with various high-temperature-resistant additives, significantly optimizing the overall heat resistance of potassium silicate composite products.
Commonly used high-temperature additives include alumina, magnesium oxide, aluminum powder, and wollastonite—high-performance refractory powders with melting points far exceeding 1000°C. When scientifically blended with potassium silicate, these materials effectively compensate for the poor high-temperature stability of pure potassium silicate, improving the final product’s heat resistance, thermal shock resistance, and crack prevention.
After formulation modification, the composite material achieves greatly enhanced thermal performance, easily surpassing the 1000°C threshold and meeting the demands of high-temperature furnaces, industrial equipment, and fire protection projects.
IV. Summary of Key Misconceptions in Procurement and Production
In summary, one crucial point must be clearly understood: 800°C represents the stable high-temperature performance of pure potassium silicate raw material and reflects its inherent base properties of heat resistance of potassium silicate.
The temperature resistance rating above 1000°C reflects the overall performance of potassium silicate-based composite refractory products, achieved through scientific formulations and modified processing techniques, rather than being an inherent property of potassium silicate as a single raw material.
This is why we specify 800°C—adhering to truthful labeling of actual raw material parameters without exaggeration or misguidance, enabling customers to precisely control formulation ratios and design appropriate production plans based on their own additive systems, thereby avoiding substandard refractory performance due to parameter misjudgment.
For manufacturers of fireproof coatings and refractory materials, clearly distinguishing between raw material and finished product performance of heat resistance of potassium silicate is crucial for ensuring product quality and mitigating production risks.
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May 28, 2026
Solid Potassium Silicate Glass (Potassium Water Glass) – Sanlee Chemical
What is potassium silicate glass?

Potassium silicate glass, commonly known as potassium water glass, is an extensively used inorganic compound. Due to its unique chemical properties and stable performance, it plays an indispensable role in various fields such as industry and agriculture. Compared with liquid potassium silicate, Potassium silicate glass is more convenient for storage, transportation, and proportioning use, with higher purity and more stable performance.
Sanlee Chemical as a professional potassium water glass supplier, we provide high-purity industrial potassium silicate with stable performance, especially the customized solid potassium silicate modulus 3.3-3.9 that meets diverse industrial production needs.
It is a core auxiliary material for many industries. This article will provide a detailed analysis of the basic properties, core characteristics, and multi-field applications of Potassium silicate glass, and helping everyone fully understand its application value, as well as the practical significance of potassium water glass in industrial and agricultural production.

Basic Properties and Core Characteristics of Potassium silicate glass (Potassium water glass)

Potassium silicate glass, as an inorganic compound, has a definite chemical composition and unique physical and chemical properties, which determine its wide range of applications. The specific details are as follows:

(1) Basic Physical and Chemical Properties

The chemical formula of Potassium silicate glass is usually written as K₂O·nSiO₂ (n is the modulus, representing the ratio of silicon dioxide to potassium oxide). Its appearance is mostly colorless or slightly yellowish transparent glass-like particles or blocks, with a hard texture and being difficult to break. Its core physical properties are outstanding. Its melting point is as high as 976℃, and it has excellent high-temperature resistance, not melting or deforming in high-temperature environments.
In terms of chemical properties, it can quickly dissolve in water, forming an alkaline solution after dissolution, which can react with acids to produce silicic acid precipitates, but it does not dissolve in organic solvents such as ethanol, and its stability is extremely strong—this is one of the most prominent chemical characteristics of potassium water glass.

(2) Core Feature Advantages

Apart from its basic properties, the core characteristics of Potassium silicate glass make it suitable for various application fields:
Firstly, it has strong adhesion, and the alkaline solution formed after dissolution has excellent adhesion ability, which can firmly bond various substances;
Secondly, it has excellent heat resistance and fire resistance, with a high melting point and non-flammability, making it suitable for high-temperature scenarios and fire prevention requirements;
Thirdly, it has good corrosion resistance, capable of resisting the erosion of various acids and alkalis, with strong stability; Fourthly, it is environmentally friendly and non-toxic, belonging to inorganic materials, without irritating odors, and relatively friendly to the environment and human body, suitable for various scenarios such as agriculture and civilian use.

CAS Number
CAS No.: 1312-76-1

Chemical Formula
General chemical formula: K₂O·nSiO₂; The specific formula of our solid potassium silicate modulus 3.3–3.9 is matched according to the precise molar ratio of silica and potassium oxide, with stable molecular structure and consistent product batch performance.
April 15, 2026