Will a sealer stop my floor dusting?

Yes, if you choose a product that forms a polymer layer - it binds the loose particles on the surface and gives a dust-free finish. It is not a substitute for a hardener where the concrete itself is dusting because it was poorly floated - the problem is then in the slab, not on it.

Can I seal concrete indoors?

Yes - choose a product approved for indoor use. With a solvent-based one, ventilate during application and for the period given in the product instructions.

What do I do about old oil stains?

Remove them before sealing, with an oil stain remover. A sealer applied over a stain seals it in and fixes it - oil will not evaporate through a sealed layer.

Does a sealer protect against road salt?

It helps - it limits the ingress of water and the salts dissolved in it.

What separates the -1 from the -2?

Composition and finish. The -1 versions are single-component, based on siloxanes alone, and dry colourless. The -2 versions are multi-component - siloxanes with modified silanes - and give a lasting wet-look finish. Both meet PN-EN 1504-2 tab. 3 and both leave the pores open.

When is the surface rain resistant?

After 5-6 hours. Until then, protect the freshly sealed surface from rain and from direct sun.

How do I work out the quantity for a fence?

Count both sides of the wall and work to the lower end of the coverage - 5 m²/l. A split-face block has far more surface than its outline suggests, so an area calculated from the fence dimensions is an underestimate.

Split-face concrete block sealer VBe-1 CTS Chemistry

Lowers the water uptake of split-face concrete blocks in fencing, walling and cladding, and dries colourless and transparent - the split-face texture stays in the foreground. A ready-to-use, water-based siloxane sealer; one litre covers 5-11 m², depending on the type of substrate and how absorbent it is.

Surface

Concrete and floors

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Product image: Split-face concrete block sealer VBe-1 CTS Chemistry

Concrete and floors

VBe-1 is a sealer for split-face concrete blocks - fence blocks, low walls, cladding. That is an exceptionally absorbent material with a developed, irregular surface.

Coverage is 5-11 m² per litre, depending on the type of material and how absorbent it is. The spread is wide because a split-face block can absorb twice as much product as a smooth one.

The product is colourless, water-based and vapour-permeable. Application temperature +5 to +30 °C.

Concrete accepts a sealer only when it is dry, clean and seasoned. A fresh slab is still giving off mix water and will push any coating off with it.

Remove cement laitance and mortar residue - left under the sealer, they come away with it.
Degrease the surface. Oil stains need an alkaline cleaner, not a detergent.
Primed or painted floors need the old coating removed; a penetrating sealer will not bond through paint.
Check the moisture in the substrate. Some solvent-based products require below 5-6 % - you will find the exact figure in the technical data.
Ventilate the room if you are working with a solvent-based product indoors.

A new floor and fresh precast units need time to season - for precast concrete it is usually around 28 days.

Before sealing the whole area, test on a patch hidden by a planter or in a corner of the patio. The same product can read differently on two batches of the same material, and on a surface with old coating left on it, it will not bond at all.

Coverage: 5-11 m²/l
Coats: 1
Base: water-based
Finish: invisible
Application method: soft roller, brush, spray
Dilution: Ready to use - do not dilute
Where to use: indoors, outdoors
Application temperature: from +5 °C to +30 °C
Product density: approx. 1.0 kg/dm³
pH: approx. 7
Colour: milky white; dries colourless and transparent
Rain resistance: after 5-6 hours
Water absorption coefficient: Wd < 0.1 kg/(m²·√h) or < 7.5 % per PN-EN 1504-2 / EN 13580
Alkali resistance: < 10 % per PN-EN 1504-2 / EN 13580
Penetration depth: > 5 mm, per EN 14630
Standard: PN-EN 1504-2 table 3

Will a sealer stop my floor dusting?: Yes, if you choose a product that forms a polymer layer - it binds the loose particles on the surface and gives a dust-free finish. It is not a substitute for a hardener where the concrete itself is dusting because it was poorly floated - the problem is then in the slab, not on it.
Can I seal concrete indoors?: Yes - choose a product approved for indoor use. With a solvent-based one, ventilate during application and for the period given in the product instructions.
What do I do about old oil stains?: Remove them before sealing, with an oil stain remover. A sealer applied over a stain seals it in and fixes it - oil will not evaporate through a sealed layer.
Does a sealer protect against road salt?: It helps - it limits the ingress of water and the salts dissolved in it.
What separates the -1 from the -2?: Composition and finish. The -1 versions are single-component, based on siloxanes alone, and dry colourless. The -2 versions are multi-component - siloxanes with modified silanes - and give a lasting wet-look finish. Both meet PN-EN 1504-2 tab. 3 and both leave the pores open.
When is the surface rain resistant?: After 5-6 hours. Until then, protect the freshly sealed surface from rain and from direct sun.
How do I work out the quantity for a fence?: Count both sides of the wall and work to the lower end of the coverage - 5 m²/l. A split-face block has far more surface than its outline suggests, so an area calculated from the fence dimensions is an underestimate.