{"id":14465,"date":"2026-05-06T07:59:42","date_gmt":"2026-05-06T07:59:42","guid":{"rendered":"https:\/\/tenessy.com\/?p=14465"},"modified":"2026-05-06T08:00:06","modified_gmt":"2026-05-06T08:00:06","slug":"how-to-choose-the-right-hpmc-grade-for-your-drymix-mortar-formulations","status":"publish","type":"post","link":"https:\/\/tenessy.com\/it\/how-to-choose-the-right-hpmc-grade-for-your-drymix-mortar-formulations\/","title":{"rendered":"How to Choose the Right HPMC Grade for Your Drymix Mortar Formulations"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"14465\" class=\"elementor elementor-14465\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fdbc6e4 e-flex e-con-boxed e-con e-parent\" data-id=\"fdbc6e4\" data-element_type=\"container\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-20af60d elementor-widget elementor-widget-image\" data-id=\"20af60d\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"491\" src=\"https:\/\/tenessy.com\/wp-content\/uploads\/2026\/05\/drymix-mortar.jpg\" class=\"attachment-large size-large wp-image-14472\" alt=\"drymix-mortar\" srcset=\"https:\/\/tenessy.com\/wp-content\/uploads\/2026\/05\/drymix-mortar.jpg 1000w, https:\/\/tenessy.com\/wp-content\/uploads\/2026\/05\/drymix-mortar-300x184.jpg 300w, https:\/\/tenessy.com\/wp-content\/uploads\/2026\/05\/drymix-mortar-768x472.jpg 768w, https:\/\/tenessy.com\/wp-content\/uploads\/2026\/05\/drymix-mortar-18x12.jpg 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5ae54ec elementor-widget elementor-widget-text-editor\" data-id=\"5ae54ec\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\">In the world of drymix mortar production, small differences in raw materials can lead to major variations in final product performance. Among all additives,\u00a0<a href=\"https:\/\/tenessy.com\/products\/hpmc-hydroxypropyl-methyl-cellulose\/\"><strong>Idrossipropilmetilcellulosa (HPMC)<\/strong><\/a>\u00a0stands out as one of the most critical functional ingredients. It directly influences water retention, workability, sag resistance, open time, and adhesion strength.<\/p><p class=\"ds-markdown-paragraph\">However, selecting the\u00a0<strong>right HPMC grade<\/strong>\u00a0for your specific drymix mortar formulation is not a one-size-fits-all decision. With dozens of viscosity options, substitution types, and modification degrees available,\u00a0<strong>how do you make the correct choice?<\/strong><\/p><p class=\"ds-markdown-paragraph\">This guide\u2014based on TENESSY\u2019s 15+ years of experience in <a href=\"https:\/\/tenessy.com\/products\/cellulose-ether\/\">etere di cellulosa<\/a> supply and mortar formulation support\u2014will help you understand the key parameters and make an informed, application-driven decision.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bbece77 elementor-widget elementor-widget-heading\" data-id=\"bbece77\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">I.  Why HPMC Grade Selection Matters in Drymix Mortar<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1d6e955 elementor-widget elementor-widget-image\" data-id=\"1d6e955\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"800\" height=\"534\" src=\"https:\/\/tenessy.com\/wp-content\/uploads\/2026\/05\/Hydroxypropyl-Methyl-Cellulose-powder-1024x683.webp\" class=\"attachment-large size-large wp-image-14470\" alt=\"Hydroxypropyl-Methyl-Cellulose-powder\" srcset=\"https:\/\/tenessy.com\/wp-content\/uploads\/2026\/05\/Hydroxypropyl-Methyl-Cellulose-powder-1024x683.webp 1024w, https:\/\/tenessy.com\/wp-content\/uploads\/2026\/05\/Hydroxypropyl-Methyl-Cellulose-powder-300x200.webp 300w, https:\/\/tenessy.com\/wp-content\/uploads\/2026\/05\/Hydroxypropyl-Methyl-Cellulose-powder-768x512.webp 768w, https:\/\/tenessy.com\/wp-content\/uploads\/2026\/05\/Hydroxypropyl-Methyl-Cellulose-powder-1536x1024.webp 1536w, https:\/\/tenessy.com\/wp-content\/uploads\/2026\/05\/Hydroxypropyl-Methyl-Cellulose-powder-2048x1365.webp 2048w, https:\/\/tenessy.com\/wp-content\/uploads\/2026\/05\/Hydroxypropyl-Methyl-Cellulose-powder-18x12.webp 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d7524a3 elementor-widget elementor-widget-text-editor\" data-id=\"d7524a3\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\">HPMC is not merely a thickener. In drymix mortar, it performs three primary functions:<\/p><ol start=\"1\"><li><p class=\"ds-markdown-paragraph\"><strong>Ritenzione idrica<\/strong>\u00a0\u2013 Prevents water from migrating too quickly into the substrate, ensuring proper cement hydration.<\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>Workability improvement<\/strong>\u00a0\u2013 Provides smooth, non-sticky mixing and application properties.<\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>Open time extension<\/strong>\u00a0\u2013 Allows sufficient time for tile positioning or surface leveling before the mortar skins over.<\/p><\/li><\/ol><p class=\"ds-markdown-paragraph\">If you choose the\u00a0<strong>wrong HPMC grade<\/strong>, you may face:<\/p><ul><li><p class=\"ds-markdown-paragraph\">Sagging or slipping in thick-layer applications<\/p><\/li><li><p class=\"ds-markdown-paragraph\">Short open time for tile adhesives<\/p><\/li><li><p class=\"ds-markdown-paragraph\">Poor adhesion strength<\/p><\/li><li><p class=\"ds-markdown-paragraph\">Sticky or heavy-feeling mortar<\/p><\/li><li><p class=\"ds-markdown-paragraph\">Inconsistent setting and cracking<\/p><\/li><\/ul><p class=\"ds-markdown-paragraph\">Thus, understanding HPMC specifications is not a luxury\u2014it is a\u00a0<strong>necessity<\/strong>\u00a0for mortar producers seeking consistent quality and competitive advantage.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0c8fd91 elementor-widget elementor-widget-heading\" data-id=\"0c8fd91\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">II.  Key Parameters for Selecting HPMC in Drymix Mortar<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ad5ddaa elementor-widget elementor-widget-text-editor\" data-id=\"ad5ddaa\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\">When evaluating HPMC grades for drymix mortar, focus on the following five technical parameters:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4a0d139 elementor-widget elementor-widget-heading\" data-id=\"4a0d139\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">1. Viscosity (mPa\u00b7s, 2% solution, 20\u00b0C)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c7729ed elementor-widget elementor-widget-text-editor\" data-id=\"c7729ed\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\">Viscosity is the most commonly discussed property, but it is also the most misunderstood.<\/p><p class=\"ds-markdown-paragraph\"><strong>Low viscosity (e.g., 400\u20132,000 mPa\u00b7s):<\/strong><\/p><ul><li><p class=\"ds-markdown-paragraph\">Suitable for <a href=\"https:\/\/tenessy.com\/applications\/application-self-leveling\/\">self\u2011leveling mortars<\/a> and highly fluid systems<\/p><\/li><li><p class=\"ds-markdown-paragraph\">Provides moderate water retention without excessive thickening<\/p><\/li><li><p class=\"ds-markdown-paragraph\">Allows rapid air release and good flow<\/p><\/li><\/ul><p class=\"ds-markdown-paragraph\"><strong>Medium viscosity (e.g., 10,000\u201340,000 mPa\u00b7s):<\/strong><\/p><ul><li><p class=\"ds-markdown-paragraph\">Ideal for general thin\u2011bed <a href=\"https:\/\/tenessy.com\/applications\/tile-adhesive\/hpmc-for-tile-adhesive\/\">adesivi per piastrelle<\/a>, <a href=\"https:\/\/tenessy.com\/applications\/painting-coatings-solutions\/\">skim coats<\/a>, and plaster mortars<\/p><\/li><li><p class=\"ds-markdown-paragraph\">Balanced water retention and workability<\/p><\/li><li><p class=\"ds-markdown-paragraph\">Most commonly used range in drymix formulations<\/p><\/li><\/ul><p class=\"ds-markdown-paragraph\"><strong>High viscosity (e.g., 60,000\u2013100,000+ mPa\u00b7s):<\/strong><\/p><ul><li><p class=\"ds-markdown-paragraph\">Designed for thick\u2011bed mortars, <a href=\"https:\/\/tenessy.com\/applications\/eifs-etics-exterior-insulation-and-finish-systems\/\">EIFS<\/a> adhesives, and textured renders<\/p><\/li><li><p class=\"ds-markdown-paragraph\">Maximum water retention and anti\u2011sag performance<\/p><\/li><li><p class=\"ds-markdown-paragraph\">Requires careful mixing to avoid lumps<\/p><\/li><\/ul><p class=\"ds-markdown-paragraph\"><strong>TENESSY tip:<\/strong>\u00a0Never rely solely on viscosity. A 75,000 mPa\u00b7s grade from one manufacturer may behave differently from another. Always test in your formulation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0506129 elementor-widget elementor-widget-heading\" data-id=\"0506129\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">2. Degree of Substitution (DS) and Hydroxypropoxy Content (HP)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a4bdde9 elementor-widget elementor-widget-text-editor\" data-id=\"a4bdde9\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"ds-scroll-area ds-scroll-area--show-on-focus-within _1210dd7 c03cafe9\"><p class=\"ds-markdown-paragraph\">HPMC is characterized by\u00a0<strong>methoxy (\u2013OCH\u2083)<\/strong>\u00a0e\u00a0<strong>hydroxypropoxy (\u2013OCH\u2082CH(OH)CH\u2083)<\/strong>\u00a0substitution.<\/p><ul><li><p class=\"ds-markdown-paragraph\"><strong>Higher methoxy content<\/strong>\u00a0\u2192 faster hydration and faster viscosity development<\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>Higher hydroxypropoxy content<\/strong>\u00a0\u2192 better water solubility and thermal gelation resistance<\/p><\/li><\/ul><p class=\"ds-markdown-paragraph\">For drymix mortars used in hot climates or cement\u2011rich systems, an HPMC with\u00a0<strong>higher hydroxypropyl modification<\/strong>\u00a0is preferred. It prevents viscosity loss at elevated temperatures (thermal gelation), ensuring consistent performance even on warm substrates.<\/p><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-00775b3 elementor-widget elementor-widget-heading\" data-id=\"00775b3\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">3. Water Retention Rate (%)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-77e4b92 elementor-widget elementor-widget-text-editor\" data-id=\"77e4b92\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\">Water retention directly affects cement hydration and final bond strength.<\/p><ul><li><p class=\"ds-markdown-paragraph\"><strong>Standard grades:<\/strong>\u00a085\u201392% water retention (suitable for indoor, mild conditions)<\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>High\u2011retention grades:<\/strong>\u00a093\u201398% (essential for <a href=\"https:\/\/tenessy.com\/applications\/gypsum-based-plaster\/\">gypsum\u2011based mortars<\/a>, high\u2011temperature environments, or highly absorbent substrates like aerated concrete)<\/p><\/li><\/ul><p class=\"ds-markdown-paragraph\">Gypsum\u2011based drymix mortars require\u00a0<strong>especially high water retention<\/strong>\u00a0because gypsum hydrates quickly and loses workability if water is withdrawn too fast.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cb7b433 elementor-widget elementor-widget-heading\" data-id=\"cb7b433\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">4. Gel Temperature<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9c05709 elementor-widget elementor-widget-text-editor\" data-id=\"9c05709\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\">Most HPMC grades have a gel point between 55\u00b0C and 75\u00b0C. When the mortar temperature exceeds this threshold, HPMC precipitates out of solution, causing sudden loss of water retention and workability.<\/p><ul><li><p class=\"ds-markdown-paragraph\">For standard applications,\u00a0<strong>60\u201365\u00b0C gel temperature<\/strong>\u00a0is sufficient.<\/p><\/li><li><p class=\"ds-markdown-paragraph\">For hot climates or thin\u2011bed applications on sun\u2011heated tiles\/substrates (temperature can reach 40\u201350\u00b0C+ mortar temperature), choose\u00a0<strong>high\u2011gel\u2011temperature HPMC (\u226570\u00b0C)<\/strong>.<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-40b0bff elementor-widget elementor-widget-heading\" data-id=\"40b0bff\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">5. Particle Size and Dispersion Speed<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e92cbcd elementor-widget elementor-widget-text-editor\" data-id=\"e92cbcd\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\">HPMC added to drymix mortar must disperse quickly without agglomeration.<\/p><ul><li><p class=\"ds-markdown-paragraph\"><strong>Surface\u2011treated (delayed dissolution) grades<\/strong>\u00a0mix well in cement\u2011based systems, avoiding \u201cfish eyes\u201d (undissolved gel particles).<\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>Dimensione delle particelle<\/strong>\u00a0should be &gt;98% passing 100 mesh (150 \u00b5m) for uniform distribution.<\/p><\/li><\/ul><p class=\"ds-markdown-paragraph\">For large\u2011scale drymix mortar plants using continuous mixers, fast\u2011dispersing HPMC grades are critical to prevent uneven spots in the final product.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-9b2cd0b e-flex e-con-boxed e-con e-parent\" data-id=\"9b2cd0b\" data-element_type=\"container\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-47b4288 elementor-widget elementor-widget-heading\" data-id=\"47b4288\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">III. HPMC Selection Guide by Mortar Type<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bdbd11f elementor-widget elementor-widget-text-editor\" data-id=\"bdbd11f\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\">The following practical table summarizes TENESSY\u2019s recommended HPMC parameters for common drymix mortar formulations.<\/p><div class=\"ds-scroll-area ds-scroll-area--show-on-focus-within _1210dd7 c03cafe9\"><table><thead><tr><th><strong>Mortar Type<\/strong><\/th><th><strong>Recommended Viscosity (mPa\u00b7s)<\/strong><\/th><th><strong>Ritenzione idrica<\/strong><\/th><th><strong>Key Consideration<\/strong><\/th><\/tr><\/thead><tbody><tr><td>Cement\u2011based tile adhesive (C1\/C2)<\/td><td>15,000 \u2013 40,000<\/td><td>\u226594%<\/td><td>Open time \u226520 min; anti\u2011sag for large tiles<\/td><\/tr><tr><td>Exterior plaster \/ render (cement)<\/td><td>40,000 \u2013 75,000<\/td><td>\u226594%<\/td><td>Crack resistance; good adhesion on concrete<\/td><\/tr><tr><td>Gypsum plaster \/ joint filler<\/td><td>20,000 \u2013 40,000<\/td><td>\u226596%<\/td><td>High retention; avoids premature setting<\/td><\/tr><tr><td>Self\u2011leveling mortar (cement)<\/td><td>400 \u2013 1,500<\/td><td>Moderato<\/td><td>Low viscosity; fast air release<\/td><\/tr><tr><td>EIFS adhesive (external insulation)<\/td><td>60,000 \u2013 100,000<\/td><td>\u226596%<\/td><td>High water retention + high viscosity<\/td><\/tr><tr><td>Skim coat \/ putty (powder form)<\/td><td>35,000 \u2013 50,000<\/td><td>Moderate\u2011high<\/td><td>Smooth finish; easy sanding<\/td><\/tr><tr><td>Repair mortar (thick layer)<\/td><td>50,000 \u2013 75,000<\/td><td>Alto<\/td><td>Anti\u2011sag; good thixotropy<\/td><\/tr><\/tbody><\/table><\/div><p class=\"ds-markdown-paragraph\"><em>Note: Values are indicative. Actual selection should be confirmed by laboratory trials with your local raw materials.<\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-83ea234 elementor-widget elementor-widget-heading\" data-id=\"83ea234\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">IV. Common Mistakes to Avoid When Choosing HPMC<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3712386 elementor-widget elementor-widget-text-editor\" data-id=\"3712386\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"ds-scroll-area ds-scroll-area--show-on-focus-within _1210dd7 c03cafe9\">\n<p class=\"ds-markdown-paragraph\">Over the years, TENESSY\u2019s technical team has observed several frequent mistakes:<\/p>\n\n<h3 style=\"font-size: 20px\">\u274c Mistake 1: Choosing the highest viscosity \u201cjust to be safe\u201d<\/h3>\n<p class=\"ds-markdown-paragraph\">High viscosity does not always mean better performance. In self\u2011leveling mortars, high viscosity traps air and kills flow. In tile adhesives, excessively high viscosity reduces wetting and decreases bond strength.<\/p>\n\n<h3 style=\"font-size: 20px\">\u274c Mistake 2: Ignoring the substrate absorbency<\/h3>\n<p class=\"ds-markdown-paragraph\">On highly absorbent substrates (e.g., red brick, AAC blocks), standard HPMC grades often fail. A high\u2011water\u2011retention grade is mandatory.<\/p>\n\n<h3 style=\"font-size: 20px\">\u274c Mistake 3: Not testing HPMC\u2011cement compatibility<\/h3>\n<p class=\"ds-markdown-paragraph\">Some HPMC grades retard cement setting too strongly. Always run a compatibility test with your specific cement type.<\/p>\n\n<h3 style=\"font-size: 20px\">\u274c Mistake 4: Focusing only on price<\/h3>\n<p class=\"ds-markdown-paragraph\">Lower\u2011priced HPMC often comes with inconsistent viscosity, lower purity (higher salt content), or poor gel temperature stability. The cost of field complaints far exceeds the raw material savings.<\/p>\n\n<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a3f4944 elementor-widget elementor-widget-heading\" data-id=\"a3f4944\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">V. The TENESSY Approach: Supporting Your HPMC Selection<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8fce879 elementor-widget elementor-widget-text-editor\" data-id=\"8fce879\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\">A\u00a0<strong>TENEREZZA<\/strong>, we do not simply sell HPMC. We provide\u00a0<strong>formulation\u2011led technical support<\/strong>\u00a0to help drymix mortar manufacturers succeed.<\/p><h3>Our process includes:<\/h3><ol start=\"1\"><li><p class=\"ds-markdown-paragraph\"><strong>Needs analysis<\/strong>\u00a0\u2013 We ask about your mortar type, target market, substrate conditions, and climate.<\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>Sample testing<\/strong> \u2013 Free samples of\u00a0 recommended HPMC grades for your internal trials.<\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>Optimization feedback<\/strong>\u00a0\u2013 Our chemists guide you on dosage fine\u2011tuning<\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>Consistent supply chain<\/strong>\u00a0\u2013 Full traceability and batch\u2011to\u2011batch stability.<\/p><\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9cf3064 elementor-widget elementor-widget-heading\" data-id=\"9cf3064\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Conclusione<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d55bd9a elementor-widget elementor-widget-text-editor\" data-id=\"d55bd9a\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\">Choosing the right HPMC grade for your drymix mortar formulation is a strategic technical decision, not a commodity purchase.\u00a0<strong>Viscosity, water retention, gel temperature, and substitution chemistry<\/strong>\u00a0must all align with your mortar type, climate conditions, and application requirements.<\/p><p class=\"ds-markdown-paragraph\">A\u00a0<a href=\"https:\/\/tenessy.com\/\"><strong>TENEREZZA<\/strong><\/a>, we combine deep cellulose ether <a href=\"https:\/\/tenessy.com\/hpmc-supplier\/innovation\/\">R&amp;S<\/a> expertise with practical drymix mortar formulation support. Whether you produce\u00a0<strong>cement\u2011based tile adhesives, gypsum plasters, self\u2011leveling compounds, or exterior renders<\/strong>, our team can help you select and validate the optimal HPMC grade\u2014efficiently and reliably.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>In paint formulation design, Hydroxyethyl Cellulose (HEC) is one of the most commonly used rheology modifiers and water retention agents.<\/p>","protected":false},"author":1,"featured_media":14472,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[35],"tags":[],"class_list":["post-14465","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to Choose the Right HPMC Grade for Your Drymix Mortar Formulations - HPMC|HEMC|HEC|RDP Manufacturer-TENESSY<\/title>\n<meta name=\"description\" content=\"HEC&#039;s DS governs structural stability; MS governs hydrophilicity and open time. 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