Liquid glass: pros and cons, properties and precautions

Talk about liquid glass pros and cons it's worth starting with a definition. Liquid glass ETIZ is an aqueous solution of sodium silicate obtained from natural raw materials (quartz sand and soda). Externally, it is a transparent-yellowish viscous concentrate, which is used in construction, repair and everyday life. It is important not to confuse sodium liquid glass with sheet and insulating materials: this is a silicate liquid, and not a composite sheet or reinforcement. ETIZ produces sodium liquid glass — a universal product for waterproofing, concrete and surface protection.

What is liquid glass in simple words

By chemical nature, liquid glass is a solution of sodium silicate (Na₂O·nSiO₂) in water. When applied to a porous surface, the water evaporates and the silicate forms a solid vitreous film that fills the pores and capillaries. It is this mechanism that gives the material its key properties: waterproofing, hardening, dedusting and protection against biodegradation. Sodium liquid glass is standardized GOST 13078 — specific indicators are indicated in the passport for the batch.

Advantages of liquid glass

The strengths of the material explain why it continues to be used for decades, despite the emergence of modern polymer compositions.

• Affordable price and economy. Liquid glass is one of the most affordable waterproofing and reinforcing materials; consumption is moderate, and the effect is noticeable.
• Reliable waterproofing. Penetrating into the pores of concrete, stone and plaster, silicate cuts off capillary moisture and increases the water resistance of the structure.
• Non-combustibility and fire protection. This is a mineral silicate — it does not burn and does not support combustion, therefore it is used as a fire-retardant impregnation of wood and the basis of refractory castings.
• Antiseptic properties. Alkaline environment inhibits mold, fungus and rotting — important for basements, cellars and wooden elements.
• Hardening and dedusting. Impregnation of the concrete floor binds dust, improves surface strength and wear resistance before laying the finish coating.
• Universality. One material covers several tasks: waterproofing, solution additive, primer, antiseptic, silicate adhesive for paper, cardboard, glass, porcelain.
• Increasing the resistance of concrete. As an additive in the cement slurry, liquid glass increases water resistance, chemical resistance and accelerates setting.

Disadvantages of liquid glass

An honest E-E-A-T parsing is impossible without restrictions. It is important to take them into account at the stage of work planning.

• Quickly grasps. The train "gets up" very quickly, so you need to work quickly and in small areas — it is difficult to process a large area in one pass.
• Fragile film in its pure form. The hardened layer of silicate without fillers is prone to cracking under deformations and impact loads; for membrane waterproofing, it is more often used in conjunction with cement.
• Not suitable for all finishes. Some paints, varnishes and adhesives do not fit well on clean liquid glass — a smooth non-porous film reduces adhesion. Compatibility is checked in advance.
• Alkaline environment Sodium silicate solution is alkaline, so when working, you need to protect your skin and eyes, use gloves and glasses.
• Requires experience in dosing. An excess of liquid glass in concrete can, on the contrary, reduce the strength — the proportions are selected for the task.
• Does not replace a full-fledged membrane. In complex hydraulic loads, liquid glass works as one of the layers of the system, rather than the only protection.

Advantages and disadvantages of liquid glass: summary table

Typical Characteristics of Sodium Liquid Glass

For the exact values, always refer to the ETHYZ data sheet; below are the indicative ranges typical of sodium liquid glass.

Where liquid glass is used

• Lubricating waterproofing foundation, basement, cellar, pool, well, walls, screed.
• Additive in concrete and mortar: waterproof and acid-resistant concrete, acceleration of setting.
• Priming and impregnation: dedusting and hardening of concrete floors and walls before finishing.
• Wood protection: flame retardant and antiseptic impregnation.
• Glue and putty: silicate adhesive for paper, cardboard, glass, porcelain; refractory putties for stoves and fireplaces.

You can choose the packaging and clarify the characteristics in the catalog: Liquid glass.

Indicative proportions

The proportions depend on the task and are approximate — always check according to the instructions. For waterproofing coating, the concentrate is usually diluted with water approximately 1:2–1:3. As an additive, a small fraction of the cement weight is introduced into the concrete liquid glass. Precise recipes are selected empirically in a small area, since excess reduces strength.

Precautionary statement(s)

• Work with gloves and safety glasses — the composition is alkaline.
• In case of contact with skin or eyes, rinse immediately with plenty of water.
• Apply in small areas: the material sets quickly.
• Rinse the instrument with water immediately after use, before solidification.
• Check compatibility with the finish coating on a small fragment.

Shelf life & storage

Liquid glass is stored in a tightly closed factory canister, away from direct sunlight, at a positive temperature — freezing and drying worsen the properties. The specific shelf life is indicated on the packaging and in the ETIZ passport; open containers are kept hermetically sealed so that the composition does not thicken and carbonize under the influence of air. Precipitation or thickening does not always mean spoilage — with a slight stratification, the solution is gently mixed.

Bottom line: liquid glass is a working and inexpensive material with clear advantages and honest disadvantages. If we take into account the fast setting, the brittleness of the clean film and the alkaline nature, the sodium liquid glass ETIZ solves a wide range of tasks — from waterproofing to protecting wood. Assortment and packaging — in liquid glass catalogue.

FAQs

What are the main pros and cons of liquid glass?

The main advantages: low price, reliable waterproofing due to pore filling, non-combustibility, antiseptic effect against mold and versatility. The main disadvantages are: very fast setting (you need to work in small areas), the fragility of the film in its pure form, limited compatibility with some paints and finishes, as well as an alkaline environment that requires you to protect your skin and eyes. With proper application, the pros outweigh the limitations.

Why does liquid glass produce a brittle film?

In its pure form, solidified sodium silicate forms a vitreous layer without elastic fillers, so it is prone to cracking under deformations and impacts. That is why, for membrane waterproofing, liquid glass is more often used in conjunction with cement or as a component of a solution, rather than as a single thin layer. This combination maintains water resistance and reduces the risk of cracks.

What liquid glass does ETHYZ produce — sodium or potassium?

ETHYZ produces sodium liquid glass — an aqueous solution of sodium silicate. It is a versatile product for construction, waterproofing, concrete additives and surface protection. Potassium liquid glass is another material that is more often used in paints and flame retardants; in this line, ETIZ does not position it. Packing of sodium liquid glass ETIZ — cans of 5 l (7 kg) and 10 l (14 kg).

How to dilute liquid glass and in what proportions?

The proportions are approximate and depend on the task, so always check them according to the instructions. For waterproofing coating, the concentrate is usually diluted with water approximately 1:2–1:3. As an additive, a small fraction of the cement weight is introduced into the concrete liquid glass. The exact values are selected in the trial section, since the excess composition can reduce the strength. Work quickly — the material catches on quickly.

What precautions do you need when working?

Liquid glass is an alkaline solution, so wear gloves and safety glasses, avoid contact with skin and eyes, and rinse with water immediately upon contact. Apply the compound in small areas due to fast setting and wash the tool immediately until it hardens. Before finishing, check the compatibility of the finish coating with the silicate film on a small surface fragment.

What is the shelf life and how to store liquid glass?

Store the liquid glass in a tightly closed factory canister at positive temperature, away from direct sunlight; avoid freezing and drying. The specific expiration date is indicated on the packaging and in the ETHYZ passport. Keep open containers hermetically sealed so that the compound does not thicken. Slight stratification or sediment does not always mean spoilage — the solution is gently mixed before use.