# Water-based or solvent-based impregnating stain: differences, coverage and when to choose each > A practical guide to understanding which technology to choose for your wood protection project URL: https://legno.covemavernici.com/en/bottega/impregnante-allacqua-o-a-solvente-differenze-resa-e-quando-scegliere #### A practical guide to understanding which technology to choose for your wood protection project - [impregnating stains](https://legno.covemavernici.com/en/bottega?tag=impregnating%20stains) - [comparisons and guides](https://legno.covemavernici.com/en/bottega?tag=comparisons%20and%20guides) - [impregnante alta protezione](https://legno.covemavernici.com/en/bottega?tag=impregnante%20alta%20protezione) - [ecologic legno](https://legno.covemavernici.com/en/bottega?tag=ecologic%20legno) Category: Wood Products Reading time: 4 min It is one of the most searched-for questions among people approaching wood treatment for the first time, and also one of the most poorly answered online: water-based or solvent-based wood stain, which should you choose? **The truth is that there is no answer that always holds — it depends on the wood, the setting and what you really need.** #### The basic differences Water-based wood stains, such as the Impregnante Alta Protezione (65.665) in our range, are formulated with acrylic and urethane resins in emulsion. **They are odourless, fast-drying and generally seen as better suited to lived-in spaces — something increasingly sought after both by those who live in the treated spaces (terraces, verandas) and by professionals who work in close contact with the product.** Solvent-based wood stains, such as Ecologic Legno (62.620), represent the more traditional technology in wood treatment. **Their distinctive feature is strong penetration: the solvent carries the active ingredient deeper into the fibres, a technical advantage that in some situations remains irreplaceable.** #### When to choose water-based If you are treating lived-in spaces — a veranda, a home balcony, garden furniture where you spend time — water-based technology is generally the most convenient choice: no intrusive odour, fast drying (one hour touch-dry for Alta Protezione), and the ability to use the treated spaces again in a short time. #### When to choose solvent-based There are situations in which the greater penetration of solvent really makes the difference: very porous or already partly degraded wood, items exposed to extreme conditions, or renovation cycles on surfaces previously treated with solvent-based products, where sticking with the same technology ensures greater compatibility. #### An often underestimated factor: coverage It is not just a question of which product, but also of how much product you need. Impregnante Alta Protezione has a coverage of 6-8 m²/L; Ecologic Legno, being a penetrating product, has a coverage that varies with the substrate — that is, it depends heavily on the absorbency of the specific wood. **On very porous wood, a solvent-based product may require more coats but provide deeper, longer-lasting protection.** Can the two types be alternated? Yes, with care. Impregnante Alta Protezione can also be applied over previous finishes based on solvent-based wood stains, provided they have been properly sanded and cleaned. **The reverse switch — from water-based to solvent-based — generally calls for more caution and a case-by-case assessment, because solvents can react differently with an existing film.** #### In summary Water-based and solvent-based are not better or worse in absolute terms: they are two tools with different characteristics. **Choose water-based (65.665) for lived-in spaces, speed and ease of use; choose solvent-based (62.620) when deep penetration on difficult wood is the absolute priority.** #### Recommended products [BACK TO THE WORKSHOP](https://legno.covemavernici.com/en/bottega) #### Related articles - [impregnating stains Wood impregnating stain: a guide to choosing among the 4 impregnating stains in the Covema range Wood Products 4 min Alta Protezione, Effetto Cera, Seriltop or Ecologic: how to find your way among Covema impregnating stains for your project READ](https://legno.covemavernici.com/en/bottega/impregnante-per-legno-guida-alla-scelta-tra-i-4-impregnanti-della-gamma-covema) - [impregnating stains High Protection impregnating stain: when and how to use it on exterior wood Wood Products 4 min Everything you need to know about the most requested product in the Covema Linea Legno READ](https://legno.covemavernici.com/en/bottega/impregnante-ad-alta-protezione-quando-e-come-usarlo-per-il-legno-esterno) - [impregnating stains Teak and exotic woods (Tanganika included): how to treat them and maintain them over time Wood Substrates / Species 3 min Tropical woods need different care from European wood: here is how to look after them properly READ](https://legno.covemavernici.com/en/bottega/teak-e-legni-esotici-tanganika-compresa-come-trattarli-e-mantenerli-nel-tempo) - [impregnante alta protezione Wooden garden house or shed: how to choose the right treatments for long-lasting protection Ideas with Wood – Outdoors 3 min From small sheds to chalets: a guide to protection cycles for outdoor wooden structures READ](https://legno.covemavernici.com/en/bottega/casa-o-casetta-in-legno-da-giardino-come-scegliere-i-trattamenti-giusti-per-una-protezione-duratura)