How much product do I need for my project?

Coverage varies by product and stone porosity. Typical ranges: Cleaners (diluted): 50-200 m²/L. Intensive cleaners (diluted): 5-20 m²/L. Impregnators: 5-30 m²/L (very porous stone like sandstone uses more, dense granite uses less). Apply two coats on very porous stone. As a rule of thumb: for a 20m² room, you typically need 1L of impregnator and 0.5L of concentrated cleaner.

How important is it to seal sandstone?

Extremely important. Sandstone is one of the most porous natural stones — it absorbs water and stains very quickly. Unsealed sandstone outdoors will absorb water, leading to frost damage in winter and rapid biological growth. Unsealed sandstone indoors will stain easily from any liquid. Apply Lithofin MN Stain-Stop generously — two coats are recommended because sandstone is so absorbent. Re-seal outdoor sandstone every 2-3 years.

Should I seal stone before or after grouting?

After grouting is standard practice — seal once the grout has cured. However, pre-sealing before grouting can be beneficial for very porous stone (sandstone, some limestone) to prevent grout from staining the stone surface. If pre-sealing: apply one light coat of MN Stain-Stop, allow to cure 24h, then grout. After grouting and curing, clean cement haze, then apply the full sealing treatment. Note: pre-sealing adds cost and time, so it is mainly recommended for very porous or light-coloured stone.

Can I use a pressure washer on my stone?

Yes, but with caution. Keep minimum 30cm distance from the surface. Use a fan nozzle, not a point nozzle. Soft stone (sandstone, limestone, cotto) is more vulnerable — use lower pressure (max 100 bar). Hard stone (granite, basalt, slate) can tolerate higher pressure. Never aim at joints at close range — this can wash out joint sand/mortar. Never pressure wash polished stone (will damage the polish). Chemical pre-treatment with ALGEX or Outdoor Cleaner reduces the need for high pressure.

How do I protect outdoor stone from frost damage?

Frost damages stone when water inside the pores freezes and expands. Prevention: 1) Seal with a breathable impregnator (MN Stain-Stop or MN Basic Protection) — this prevents water from entering while allowing moisture to escape. 2) Ensure proper drainage slope (min 1-2%) so water doesn't pool. 3) Keep stone free of leaves and debris that trap moisture. 4) Re-seal before winter. Most susceptible: sandstone, limestone, cotto. Most resistant: granite, basalt, slate. New concrete must cure 28 days before sealing.

How can I prepare my outdoor stone for winter?

To prepare your outdoor stone for winter, it's essential to clean the surface thoroughly and apply a protective sealant. Lithofin MN Stain-Stop is ideal for this purpose, as it provides a water-repellent barrier against frost damage. Additionally, ensure that any cracks are filled to prevent water ingress, which can freeze and expand, causing further damage.

When is the best time to seal my stone?

The best time to seal your stone is when temperatures are between 10°C and 25°C. This ensures optimal adhesion and curing of the sealant. Lithofin MN Stain-Stop is recommended for sealing, as it provides long-lasting protection. Avoid sealing during extreme temperatures or rain to ensure the best results.

What is a seasonal maintenance calendar for my terrace?

A seasonal maintenance calendar for your terrace should include cleaning in spring with Lithofin Outdoor Cleaner, sealing in early summer with Lithofin MN Stain-Stop, and regular checks for algae and moss in autumn. In winter, ensure that the terrace is free of debris and snow to prevent frost damage. Consistent maintenance will prolong the life of your stone.

Pogosta vprašanja o peščenjaku | Vprašanja o negi kamna

Peščenjak — Pogosta vprašanja

8 vprašanj o negi peščenjaka

Koliko izdelka potrebujem za svoj projekt?

Poraba se razlikuje glede na izdelek in poroznost kamna. Običajni razponi: čistila (razredčena): 50-200 m²/L. Intenzivna čistila (razredčena): 5-20 m²/L. Impregnatorji: 5-30 m²/L (zelo porozen kamen, kot je peščenjak, porabi več, gost granit manj). Na zelo porozen kamen nanesite dva sloja. Približno: za sobo 20m² običajno potrebujete 1L impregnatorja in 0,5L koncentriranega čistila.

Priporočeno: Lithofin MN Power-Clean, Lithofin KF Intensive Cleaner, Lithofin TC Impregnator, Lithofin MN Stain-Stop

Kako pomembno je zatesniti peščenjak?

Zelo pomembno. Peščenjak je eden najbolj poroznih naravnih kamnov — hitro vpija vodo in madeže. Nezatesnjen peščenjak na prostem vpija vodo, kar vodi do poškodb zaradi zmrzali pozimi in hitre biološke rasti. Nezatesnjen peščenjak v notranjosti se zlahka obarva od tekočin. Nanesite Lithofin MN Stain-Stop obilno — priporočata se dva sloja, ker je peščenjak zelo vpojen. Zunanje peščenjake ponovno zatesnite vsakih 2-3 leta.

Priporočeno: Lithofin MN Stain-Stop

Ali naj kamen zatesnim pred ali po fugiranju?

Po fugiranju je standardna praksa — zatesnite, ko se fugirna masa strdi. Vendar je predhodno zatesnjenje pred fugiranjem lahko koristno za zelo porozen kamen (peščenjak, nekatere apnence), da preprečite, da bi fugirna masa obarvala površino kamna. Če predhodno zatesnjujete: nanesite en lahek sloj MN Stain-Stop, pustite, da se strdi 24h, nato fugirajte. Po fugiranju in strditvi očistite cementni film, nato nanesite celoten postopek zatesnitve. Opomba: predhodno zatesnjenje poveča stroške in čas, zato je priporočljivo predvsem za zelo porozen ali svetel kamen.

Priporočeno: Lithofin MN Stain-Stop

Ali lahko uporabim visokotlačni čistilec na svojem kamnu?

Da, vendar previdno. Ohranite najmanj 30 cm razdalje od površine. Uporabite šobo za ventilator, ne točkovno šobo. Mehki kamen (peščenjak, apnenec, cotto) je bolj občutljiv — uporabite nižji tlak (maks 100 bar). Trdi kamen (granit, bazalt, skrilavec) prenese višji tlak. Nikoli ne usmerjajte na spoje od blizu — to lahko izpere pesek/malto iz spojev. Nikoli ne čistite poliranega kamna pod pritiskom (poškoduje poliranje). Kemična predobdelava z ALGEX ali Outdoor Cleaner zmanjša potrebo po visokem tlaku.

Priporočeno: Lithofin MN Outdoor Cleaner, Lithofin ALGEX, Lithofin MN Easy-Clean

Kako zaščitim zunanji kamen pred poškodbami zaradi zmrzali?

Zmrzal poškoduje kamen, ko voda v porah zmrzne in se razširi. Preprečevanje: 1) Zatesnite z dihljivim impregnatorjem (MN Stain-Stop ali MN Basic Protection) — to preprečuje vstop vode, hkrati pa omogoča izhlapevanje vlage. 2) Zagotovite ustrezen naklon za odvodnjavanje (min 1-2 %), da se voda ne zbira. 3) Ohranite kamen brez listja in ostankov, ki zadržujejo vlago. 4) Ponovno zatesnite pred zimo. Najbolj občutljivi: peščenjak, apnenec, cotto. Najbolj odporni: granit, bazalt, skrilavec. Nov beton mora zoreti 28 dni pred zatesnitvijo.

Priporočeno: Lithofin MN Stain-Stop, Lithofin MN Basic Protection

Kako pripravim zunanji kamen na zimo?

Za pripravo zunanjega kamna na zimo je bistveno temeljito očistiti površino in nanesti zaščitni premaz. Lithofin MN Stain-Stop je idealen za ta namen, saj zagotavlja vodoodbojno pregrado proti poškodbam zaradi zmrzali. Poleg tega poskrbite, da so vse razpoke zapolnjene, da preprečite vdor vode, ki lahko zmrzne in se razširi, kar povzroči dodatne poškodbe.

Priporočeno: Lithofin MN Stain-Stop

Kdaj je najboljši čas za zatesnitev kamna?

Najboljši čas za zatesnitev kamna je, ko so temperature med 10°C in 25°C. To zagotavlja optimalno oprijemljivost in strjevanje premaza. Lithofin MN Stain-Stop je priporočljiv za zatesnitev, saj zagotavlja dolgotrajno zaščito. Izogibajte se zatesnjevanju pri ekstremnih temperaturah ali dežju za najboljše rezultate.

Priporočeno: Lithofin MN Stain-Stop

Kakšen je sezonski koledar vzdrževanja za mojo teraso?

Sezonski koledar vzdrževanja za vašo teraso naj vključuje čiščenje spomladi z Lithofin Outdoor Cleaner, zatesnitev v zgodnjem poletju z Lithofin MN Stain-Stop in redne preglede za alge in mah jeseni. Pozimi poskrbite, da je terasa brez ostankov in snega, da preprečite poškodbe zaradi zmrzali. Dosledno vzdrževanje bo podaljšalo življenjsko dobo vašega kamna.

Priporočeno: Lithofin Outdoor Cleaner, Lithofin MN Stain-Stop

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