{"id":8372,"date":"2025-08-05T14:28:18","date_gmt":"2025-08-05T11:28:18","guid":{"rendered":"https:\/\/www.starkimya.com\/en\/?post_type=product&#038;p=8372"},"modified":"2026-07-08T12:17:04","modified_gmt":"2026-07-08T09:17:04","slug":"heavy-duty-concrete-and-masonry-cleaner-phosphate-free-industrial-concentrate","status":"publish","type":"product","link":"https:\/\/www.starkimya.com\/en\/product\/heavy-duty-concrete-and-masonry-cleaner-phosphate-free-industrial-concentrate\/","title":{"rendered":"STR-1920 | Heavy-Duty Concrete and Masonry Cleaner \u2013 Phosphate-Free Industrial Concentrate"},"content":{"rendered":"<p data-start=\"697\" data-end=\"1080\">STR-1920 is a professional-grade concentrated surface cleaner formulated to dissolve and lift the most stubborn deposits on concrete, stone, grout, and uncoated surfaces. With its alkaline pH of 12.3, it penetrates porous substrates to loosen baked-on carbon, grease, oil stains, tar, and asphalt residues commonly found in industrial and automotive environments.<\/p>\n<p data-start=\"1082\" data-end=\"1367\">The formula is phosphate-free and environmentally conscious, containing zero VOCs, making it compliant with strict air quality regulations (AQMD Rule 102). It does not damage high-pressure pumps, making it perfectly compatible with both cold and hot water pressure washers.<\/p>\n<p data-start=\"1369\" data-end=\"1578\">In addition to concrete, STR-1920 is safe for use on aluminum, stainless steel, painted metal, plastic, and glass surfaces\u2014making it a versatile solution across many commercial and industrial applications.<\/p>\n<hr data-start=\"1580\" data-end=\"1583\" \/>\n<h5 data-start=\"1585\" data-end=\"1607\">Application Areas<\/h5>\n<ul data-start=\"1608\" data-end=\"1963\">\n<li data-start=\"1608\" data-end=\"1660\">\n<p data-start=\"1610\" data-end=\"1660\">Concrete floors, driveways, ramps, and sidewalks<\/p>\n<\/li>\n<li data-start=\"1661\" data-end=\"1694\">\n<p data-start=\"1663\" data-end=\"1694\">Workshop and garage entryways<\/p>\n<\/li>\n<li data-start=\"1695\" data-end=\"1739\">\n<p data-start=\"1697\" data-end=\"1739\">Manufacturing and maintenance facilities<\/p>\n<\/li>\n<li data-start=\"1740\" data-end=\"1779\">\n<p data-start=\"1742\" data-end=\"1779\">Service bays and vehicle wash areas<\/p>\n<\/li>\n<li data-start=\"1780\" data-end=\"1839\">\n<p data-start=\"1782\" data-end=\"1839\">Outdoor masonry and cement surfaces with baked-on grime<\/p>\n<\/li>\n<li data-start=\"1840\" data-end=\"1897\">\n<p data-start=\"1842\" data-end=\"1897\">Pre-cleaning for repainting or resurfacing operations<\/p>\n<\/li>\n<li data-start=\"1898\" data-end=\"1963\">\n<p data-start=\"1900\" data-end=\"1963\">Grout lines and unfinished wall surfaces in industrial settings<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"1965\" data-end=\"1968\" \/>\n<h5 data-start=\"1970\" data-end=\"1993\">Directions for Use<\/h5>\n<ol data-start=\"1994\" data-end=\"2403\">\n<li data-start=\"1994\" data-end=\"2056\">\n<p data-start=\"1997\" data-end=\"2056\">Dilute the product at a 1:50 ratio with clean water.<\/p>\n<\/li>\n<li data-start=\"2057\" data-end=\"2119\">\n<p data-start=\"2060\" data-end=\"2119\">Spray the solution from bottom to top on the surface.<\/p>\n<\/li>\n<li data-start=\"2120\" data-end=\"2185\">\n<p data-start=\"2123\" data-end=\"2185\">Allow it to dwell for 5\u201310 minutes. Do not allow to dry.<\/p>\n<\/li>\n<li data-start=\"2186\" data-end=\"2249\">\n<p data-start=\"2189\" data-end=\"2249\">Rinse thoroughly from top to bottom using clean water.<\/p>\n<\/li>\n<li data-start=\"2250\" data-end=\"2328\">\n<p data-start=\"2253\" data-end=\"2328\">For severe contamination, apply the product undiluted as a pre-treatment.<\/p>\n<\/li>\n<li data-start=\"2329\" data-end=\"2403\">\n<p data-start=\"2332\" data-end=\"2403\">Use with hot water pressure washers to enhance cleaning efficiency.<\/p>\n<\/li>\n<\/ol>\n<p data-start=\"2405\" data-end=\"2532\">Important: Industrial use only. Always wear gloves, goggles, and protective clothing. Do not discharge into open waterways.<\/p>\n<hr data-start=\"2893\" data-end=\"2896\" \/>\n<h5 data-start=\"2898\" data-end=\"2925\">Technical Specifications<\/h5>\n<div class=\"_tableContainer_16hzy_1\">\n<div class=\"_tableWrapper_16hzy_14 group flex w-fit flex-col-reverse\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"2927\" data-end=\"3620\">\n<thead data-start=\"2927\" data-end=\"2990\">\n<tr data-start=\"2927\" data-end=\"2990\">\n<th data-start=\"2927\" data-end=\"2958\" data-col-size=\"sm\">Specification<\/th>\n<th data-start=\"2958\" data-end=\"2990\" data-col-size=\"sm\">Value<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"3054\" data-end=\"3620\">\n<tr data-start=\"3054\" data-end=\"3116\">\n<td data-start=\"3054\" data-end=\"3084\" data-col-size=\"sm\">Appearance<\/td>\n<td data-col-size=\"sm\" data-start=\"3084\" data-end=\"3116\">Yellow liquid<\/td>\n<\/tr>\n<tr data-start=\"3117\" data-end=\"3179\">\n<td data-start=\"3117\" data-end=\"3147\" data-col-size=\"sm\">Fragrance<\/td>\n<td data-col-size=\"sm\" data-start=\"3147\" data-end=\"3179\">Citrus scent<\/td>\n<\/tr>\n<tr data-start=\"3180\" data-end=\"3242\">\n<td data-start=\"3180\" data-end=\"3210\" data-col-size=\"sm\">pH (Concentrate)<\/td>\n<td data-col-size=\"sm\" data-start=\"3210\" data-end=\"3242\">12.3<\/td>\n<\/tr>\n<tr data-start=\"3243\" data-end=\"3305\">\n<td data-start=\"3243\" data-end=\"3273\" data-col-size=\"sm\">pH (Diluted 1:150)<\/td>\n<td data-col-size=\"sm\" data-start=\"3273\" data-end=\"3305\">10.4<\/td>\n<\/tr>\n<tr data-start=\"3306\" data-end=\"3368\">\n<td data-start=\"3306\" data-end=\"3336\" data-col-size=\"sm\">Foaming Level<\/td>\n<td data-col-size=\"sm\" data-start=\"3336\" data-end=\"3368\">5 \u2013 High foam<\/td>\n<\/tr>\n<tr data-start=\"3369\" data-end=\"3431\">\n<td data-start=\"3369\" data-end=\"3399\" data-col-size=\"sm\">Hard Water Compatibility<\/td>\n<td data-col-size=\"sm\" data-start=\"3399\" data-end=\"3431\">5 \u2013 Excellent<\/td>\n<\/tr>\n<tr data-start=\"3432\" data-end=\"3494\">\n<td data-start=\"3432\" data-end=\"3462\" data-col-size=\"sm\">VOC Content<\/td>\n<td data-start=\"3462\" data-end=\"3494\" data-col-size=\"sm\">0%<\/td>\n<\/tr>\n<tr data-start=\"3495\" data-end=\"3557\">\n<td data-start=\"3495\" data-end=\"3525\" data-col-size=\"sm\">Biodegradability<\/td>\n<td data-col-size=\"sm\" data-start=\"3525\" data-end=\"3557\">Readily biodegradable<\/td>\n<\/tr>\n<tr data-start=\"3558\" data-end=\"3620\">\n<td data-start=\"3558\" data-end=\"3588\" data-col-size=\"sm\">Flash Point<\/td>\n<td data-col-size=\"sm\" data-start=\"3588\" data-end=\"3620\">100\u00b0C (212\u00b0F)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div class=\"sticky end-(--thread-content-margin) h-0 self-end select-none\">\n<div class=\"absolute end-0 flex items-end\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<hr data-start=\"3622\" data-end=\"3625\" \/>\n<h5 data-start=\"3627\" data-end=\"3650\">Storage Conditions<\/h5>\n<ul data-start=\"3651\" data-end=\"3903\">\n<li data-start=\"3651\" data-end=\"3701\">\n<p data-start=\"3653\" data-end=\"3701\">Store in a cool, dry, and well-ventilated area<\/p>\n<\/li>\n<li data-start=\"3702\" data-end=\"3763\">\n<p data-start=\"3704\" data-end=\"3763\">Keep container tightly closed and protected from sunlight<\/p>\n<\/li>\n<li data-start=\"3764\" data-end=\"3821\">\n<p data-start=\"3766\" data-end=\"3821\">Storage temperature: <strong data-start=\"3787\" data-end=\"3819\">+5\u00b0C to +30\u00b0C (41\u00b0F to 86\u00b0F)<\/strong><\/p>\n<\/li>\n<li data-start=\"3822\" data-end=\"3877\">\n<p data-start=\"3824\" data-end=\"3877\">Avoid contact with strong acids or oxidizing agents<\/p>\n<\/li>\n<li data-start=\"3878\" data-end=\"3903\">\n<p data-start=\"3880\" data-end=\"3903\">Keep away from children<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"3905\" data-end=\"3908\" \/>\n<h5 data-start=\"3910\" data-end=\"3936\">Packaging Information<\/h5>\n<ul data-start=\"3937\" data-end=\"3979\">\n<li data-start=\"3937\" data-end=\"3958\">\n<p data-start=\"3939\" data-end=\"3958\">5 L HDPE Canister<\/p>\n<\/li>\n<li data-start=\"3959\" data-end=\"3979\">\n<p data-start=\"3961\" data-end=\"3979\">20 L HDPE Canister<\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p data-start=\"258\" data-end=\"591\">STR-1920 is a high-alkaline, phosphate-free industrial cleaner formulated for the removal of oil, tar, asphalt, carbon buildup, and heavy dirt from concrete, stone, and unfinished surfaces. It is pressure washer-compatible and suitable for use on aluminum, glass, plastic, stainless steel, and painted materials.<\/p>\n<p data-start=\"593\" data-end=\"933\">\n","protected":false},"featured_media":8373,"template":"","meta":[],"product_brand":[211],"product_cat":[241],"product_tag":[2306,2166,1248,2314,2307,2305,2312,2308,2311,2221,2310,2313,2309],"class_list":{"0":"post-8372","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-can-star","7":"product_cat-industrial-products","8":"product_tag-alkaline-floor-cleaner","9":"product_tag-biodegradable-degreaser","10":"product_tag-concrete-cleaner","11":"product_tag-concrete-degreaser","12":"product_tag-garage-degreaser","13":"product_tag-heavy-duty-surface-cleaner","14":"product_tag-high-ph-detergent","15":"product_tag-high-foaming-concrete-wash","16":"product_tag-industrial-concrete-cleaner","17":"product_tag-phosphate-free-detergent","18":"product_tag-pressure-washer-detergent","19":"product_tag-stone-and-masonry-cleaner","20":"product_tag-tar-and-asphalt-remover","22":"first","23":"instock","24":"shipping-taxable","25":"product-type-simple"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.5 - 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