{"id":12518,"date":"2019-11-08T10:06:02","date_gmt":"2019-11-08T10:06:02","guid":{"rendered":"https:\/\/www.federchemicals.it\/product\/sk-40\/"},"modified":"2025-11-30T17:23:38","modified_gmt":"2025-11-30T16:23:38","slug":"sk-40","status":"publish","type":"product","link":"https:\/\/www.federchemicals.it\/en\/product\/sk-40\/","title":{"rendered":"SK-40"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><div data-vc-full-width=\"true\" data-vc-full-width-init=\"false\" class=\"vc_row wpb_row vc_row-fluid bg-panna, blu vc_custom_1630681068972 vc_row-has-padding-top vc_row-has-padding-bottom vc_row-o-equal-height vc_row-bg-position-top vc_row-o-content-middle vc_row-flex\"><div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"vc_empty_space\"   style=\"height: 25px\"><span class=\"vc_empty_space_inner\"><\/span><\/div>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p style=\"text-align: center;\"><strong><span style=\"font-size: 18px;\">HOW TO USE<\/span><\/strong><\/p>\n\n\t\t<\/div>\n\t<\/div>\n<div class=\"vc_row wpb_row vc_inner vc_row-fluid vc_row-bg-position-top\"><div class=\"wpb_column vc_column_container vc_col-sm-6\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p style=\"text-align: justify;\"><strong>PRELIMINARY TESTS<br \/>\n<\/strong>Due to the heterogeneity of the types and components of the natural stones treated with SK 40, it is advisable to carry out preliminary tests from time to time to determine the right quantity of product to use to obtain the best water-repellent protection and to ensure the absence of any chromatic variations.<br \/>\n<strong>APPLICATION<br \/>\n<\/strong>SK 40 is a water repellent that prevents liquid water from being absorbed by capillary action by stone materials. SK 40 has proven effective for the following applications: - treatment of surfaces subjected to water pressure such as: swimming pools, fountains, etc. \u2013 protection of natural stone walls from driving rain and rising damp; \u2013 prevention of efflorescence, inhibiting the transport of salts to the surface; \u2013 prevention of damage caused by freeze-thaw cycles and salts. Prevents the penetration of water and saline solutions into the pores; protection from corrosion caused by acid rain.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><div class=\"wpb_column vc_column_container vc_col-sm-6\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p style=\"text-align: justify;\"><strong>HOW TO USE<br \/>\n<\/strong>SK 40 is suitable for the water-repellent impregnation of absorbent, slightly alkaline or neutral mineral building materials, especially natural stone. SK 40 is supplied ready for use. Apply SK 40 generously two or three times until saturated. The spray pressure and the diameter of the nozzle must be chosen in such a way that there is no atomization of the impregnating agent. Operate with low impregnation pressures (0.5 \u2013 0.7 bar). The quantity to be applied depends on the absorbency of the substrate and the desired penetration depth, approximately 300-500 g\/m2. Non-absorbent substrates cannot be treated with SK 40. Contact of SK 40 with water must be avoided before application. Containers and equipment must be clean and dry. Wet stone materials treated with SK 40 may show a darker color at the end of the treatment. Surfaces that are exposed to the external atmosphere and contaminated by dust, smog, salts, saline solutions, oil, etc. must be cleaned. In fact, the complete effectiveness of a water-repellent impregnation can only be ensured if the solution can penetrate the stone materials.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"vc_row-full-width vc_clearfix\"><\/div><div class=\"vc_row wpb_row vc_row-fluid vc_custom_1657700496601 vc_row-has-padding-top vc_row-has-padding-bottom vc_row-bg-position-top\"><div class=\"wpb_column vc_column_container vc_col-sm-6\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"vc_row wpb_row vc_inner vc_row-fluid vc_row-bg-position-top\"><div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p><strong><span style=\"font-size: 18px;\">PRECAUTIONS<\/span><\/strong><\/p>\n\n\t\t<\/div>\n\t<\/div>\n\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>Do not smoke during application. Do not apply in direct sunlight or during rain or strong winds. When working with SK 40, consider the flammability due to the isopropyl alcohol used as a solvent: therefore avoid naked flames, sparks and heat sources. Water and\/or CO2 extinguishers can be used to put out flames. Although SK 40 is not toxic, take the usual precautions for handling chemical products. Minimize contact. In case of contact of SK 40 with eyes, skin and clothes, wash immediately with plenty of water.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"wpb_column vc_column_container vc_col-sm-6\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"vc_row wpb_row vc_inner vc_row-fluid vc_row-bg-position-top\"><div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p><strong><span style=\"font-size: 18px;\">STORAGE<br \/>\n<\/span><\/strong><\/p>\n\n\t\t<\/div>\n\t<\/div>\n\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>Store in a dry place. Do not expose to heat sources. Avoid humidity.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<h3>Water repellent impregnating agent for natural stones<\/h3>\n<p>SK 40 has been specifically developed for the impregnation of slightly alkaline to neutral substrates and is particularly suitable for the treatment of sandstone and natural stone in general, and can also be used for the protective treatment of highly alkaline mineral materials. GENERAL CHARACTERISTICS SK 40 is a solution of monomolecular alkylsilanes in anhydrous alcohol which, thanks to their small size (the molecular diameter is in fact of the same order of magnitude as that of the water molecule), are able to penetrate deeply into absorbent mineral building materials. In the presence of humidity they react with the walls of the capillaries and pores, creating a highly water-repellent barrier due to the high surface tension and the capillary attraction forces which are, so to speak, inverted. They act against the penetration of liquid water. The permeability to water vapour remains unchanged, as SK 40 has no film-forming action.<\/p>\n[vc_row equal_height=\"yes\" content_placement=\"bottom\" kd_background_image_position=\"vc_row-bg-position-top\"][vc_column width=\"1\/2\"][vc_column_text]FORMATI DISPONIBILI[\/vc_column_text][vc_single_image image=\"16505\" img_size=\"full\"][vc_empty_space][vc_column_text]<a class=\"myButton\" style=\"width: 100%; text-align: center;\" href=\"https:\/\/www.federchemicals.it\/wp-content\/uploads\/2026\/07\/SK-40-SCHEDA-TECNICA-CLP-ING.pdf\" target=\"_blank\" rel=\"noopener\">DATA SHEET<\/a>[\/vc_column_text][\/vc_column][vc_column width=\"1\/2\" hcbrwpb_visible_for_roles=\"administrator,subscriber,customer\"][\/vc_column][\/vc_row]","protected":false},"featured_media":12519,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"product_cat":[463,456],"product_tag":[],"class_list":["post-12518","product","type-product","status-publish","has-post-thumbnail","product_cat-idrorepellenti","product_cat-trattamento-marmo","first","instock","shipping-taxable","product-type-simple"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.11 (Yoast SEO v22.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>SK-40 - Federchemicals<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.federchemicals.it\/en\/product\/sk-40\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SK-40\" \/>\n<meta property=\"og:description\" content=\"Idrorepellente impregnante per pietre naturali SK 40 \u00e8 stato sviluppato espressamente per l&#039;impregnazione di substrati da debolmente alcalini a neutri ed \u00e8 particolarmente idoneo per il trattamento di pietre di tipo arenarie e pietre naturali in genere, ed \u00e9 possibile tuttavia impiegarlo per il trattamento protettivo di materiali minerali molto alcalini. CARATTERISTICHE GENERALI SK 40 \u00e8 una soluzione di alchilsilani monomolecolari in alcool anidro che grazie alle loro piccole dimensioni (il diametro molecolare \u00e8 infatti dello stesso ordine di grandezza di quello della molecola d&#039;acqua) sono in grado di penetrare profondamente nei materiali da costruzione minerali assorbenti. In presenza di umidit\u00e0 essi reagiscono con le pareti dei capillari e dei pori, creando una barriera fortemente idrorepellente a causa dell&#039;alta tensione superficiale e le forze di attrazione capillare che sono, per cos\u00ec dire, invertite. Esse agiscono contro la penetrazione dell&#039;acqua liquida. La permeabilit\u00e0 al vapore acqueo rimane inalterata, in quanto SK 40 non ha alcuna azione filmogena\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.federchemicals.it\/en\/product\/sk-40\/\" \/>\n<meta property=\"og:site_name\" content=\"Federchemicals\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/federchemicalsofficial\" \/>\n<meta property=\"article:modified_time\" content=\"2025-11-30T16:23:38+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.federchemicals.it\/wp-content\/uploads\/2022\/02\/sk-40-foto.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"696\" \/>\n\t<meta property=\"og:image:height\" content=\"709\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.federchemicals.it\/prodotto\/sk-40\/\",\"url\":\"https:\/\/www.federchemicals.it\/prodotto\/sk-40\/\",\"name\":\"SK-40 - Federchemicals\",\"isPartOf\":{\"@id\":\"https:\/\/www.federchemicals.it\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.federchemicals.it\/prodotto\/sk-40\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.federchemicals.it\/prodotto\/sk-40\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.federchemicals.it\/wp-content\/uploads\/2022\/02\/sk-40-foto.jpg\",\"datePublished\":\"2019-11-08T10:06:02+00:00\",\"dateModified\":\"2025-11-30T16:23:38+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/www.federchemicals.it\/prodotto\/sk-40\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.federchemicals.it\/prodotto\/sk-40\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.federchemicals.it\/prodotto\/sk-40\/#primaryimage\",\"url\":\"https:\/\/www.federchemicals.it\/wp-content\/uploads\/2022\/02\/sk-40-foto.jpg\",\"contentUrl\":\"https:\/\/www.federchemicals.it\/wp-content\/uploads\/2022\/02\/sk-40-foto.jpg\",\"width\":696,\"height\":709},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.federchemicals.it\/prodotto\/sk-40\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.federchemicals.it\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Shop\",\"item\":\"https:\/\/www.federchemicals.it\/shop\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"SK-40\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.federchemicals.it\/#website\",\"url\":\"https:\/\/www.federchemicals.it\/\",\"name\":\"Federchemicals\",\"description\":\"Trattamento pavimenti in cemento\",\"publisher\":{\"@id\":\"https:\/\/www.federchemicals.it\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.federchemicals.it\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.federchemicals.it\/#organization\",\"name\":\"Federchemicals\",\"url\":\"https:\/\/www.federchemicals.it\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.federchemicals.it\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.federchemicals.it\/wp-content\/uploads\/2022\/03\/federchemicals-logo-new.png\",\"contentUrl\":\"https:\/\/www.federchemicals.it\/wp-content\/uploads\/2022\/03\/federchemicals-logo-new.png\",\"width\":458,\"height\":97,\"caption\":\"Federchemicals\"},\"image\":{\"@id\":\"https:\/\/www.federchemicals.it\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/www.facebook.com\/federchemicalsofficial\"]}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"SK-40 - Federchemicals","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.federchemicals.it\/en\/product\/sk-40\/","og_locale":"en_US","og_type":"article","og_title":"SK-40","og_description":"Idrorepellente impregnante per pietre naturali SK 40 \u00e8 stato sviluppato espressamente per l'impregnazione di substrati da debolmente alcalini a neutri ed \u00e8 particolarmente idoneo per il trattamento di pietre di tipo arenarie e pietre naturali in genere, ed \u00e9 possibile tuttavia impiegarlo per il trattamento protettivo di materiali minerali molto alcalini. 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