{"id":10525,"date":"2026-07-10T00:00:55","date_gmt":"2026-07-10T00:00:55","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=10525"},"modified":"2026-07-10T07:06:30","modified_gmt":"2026-07-10T07:06:30","slug":"d545-vs-d547-vs-d548","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/fr\/d545-vs-d547-vs-d548\/","title":{"rendered":"WD-D545 vs WD-D547 vs WD-D548: Which Wetting Additive Fits Waterborne Wood, UV Cure, or Fast Dynamic Wetting?"},"content":{"rendered":"<p><strong>R\u00e9ponse rapide :<\/strong> Les acheteurs ne doivent pas traiter <a href=\"https:\/\/longchangchemical.com\/fr\/product\/agesin-wd-d545\/\">CHLUMICRYL\u00ae WD-D545<\/a>, <a href=\"https:\/\/longchangchemical.com\/fr\/product\/agesin-wd-d547-wetting-agent\/\">CHLUMICRYL\u00ae WD-D547<\/a>et <a href=\"https:\/\/longchangchemical.com\/fr\/product\/agesin-wd-d548\/\">CHLUMICRYL\u00ae WD-D548<\/a> as interchangeable wetting additives. <strong>WD-D545<\/strong> belongs earlier when the job is clearly a <strong>waterborne wood, industrial, or plastic coating<\/strong> program and the team wants a route supported around <strong>very strong surface-tension reduction<\/strong> plus <strong>high varnish transparency<\/strong>. <strong>WD-D547<\/strong> deserves earlier review when the buyer needs the <strong>broadest application-system window<\/strong>, because Longchang supports it across <strong>water-borne, solvent, solvent-free, and UV-cure paint<\/strong> while also listing <strong>anti-cratering, recoating, defoaming, and leveling<\/strong>. <strong>WD-D548<\/strong> should move up first when the project lives in <strong>water-borne or solvent-based paint<\/strong> and the team wants a route with a stronger <strong>dynamic surface-tension score<\/strong>, broader <strong>0,1% \u00e0 1,0%<\/strong> dosage window, and strong wetting and spreading support.<\/p>\n<p>This is a narrower buyer-selection page inside the CHLUMICRYL\u00ae wetting branch. The broader page on <a href=\"https:\/\/longchangchemical.com\/fr\/wetting-additives-coatings-inks\/\">how to choose wetting additives for coatings, inks, and difficult substrates<\/a> answers <strong>when wetting additives belong in the shortlist<\/strong>. This page answers the next question: <strong>which of these three wetting additives should be screened first once the buyer already knows the issue is substrate wetting?<\/strong><\/p>\n<h2>Why this page deserves to exist beside the broader wetting guide<\/h2>\n<p>The live CHLUMICRYL\u00ae cluster already includes the overview page for <a href=\"https:\/\/longchangchemical.com\/fr\/chlumicryl-coating-ink-additives\/\">CHLUMICRYL\u00ae Additifs pour rev\u00eatements et encres<\/a>, the broad <a href=\"https:\/\/longchangchemical.com\/fr\/wetting-additives-coatings-inks\/\">additifs mouillants<\/a> page, and the defect-routing page on <a href=\"https:\/\/longchangchemical.com\/fr\/coating-defect-additive-selection\/\">wetting additive vs leveling additive vs defoamer vs fluorine surfactant<\/a>. Those pages help buyers choose the right additive family. They do not fully answer how to choose between <strong>three specific organosilicon wetting routes<\/strong> that share the same branch but split by <strong>system boundary, secondary defect support, recommendation scores, and low-temperature handling behavior<\/strong>.<\/p>\n<p>That is why this page is still useful and non-overlapping. It helps coating and ink buyers make a tighter first-sample decision instead of testing three similar labels blindly.<\/p>\n<h2>What these three products share, and where they split<\/h2>\n<p>All three products are supported by Longchang as <strong>polyether modified polydimethyl siloxane<\/strong> wetting additives. All three are positioned around <strong>wetting and spreading<\/strong>. The split starts when buyers check <strong>which systems are supported<\/strong>, <strong>which side benefits are explicitly listed<\/strong>et <strong>which recommendation scores are strongest<\/strong>.<\/p>\n<ul>\n<li><strong>WD-D545:<\/strong> Longchang supports it for <strong>peinture \u00e0 l&#039;eau pour bois, peinture industrielle \u00e0 l&#039;eau et peinture \u00e0 l&#039;eau pour plastique<\/strong>. The page says it can <strong>r\u00e9duire plus efficacement la tension superficielle<\/strong>, has an <strong>excellente capacit\u00e9 de mouillage et d&#039;\u00e9talement<\/strong>, et \u00e0 <strong>0,2% dans l&#039;eau<\/strong> peut r\u00e9duire la tension superficielle de l&#039;eau \u00e0 <strong>20,5 mN\/m<\/strong>. The recommendation table gives it <strong>transparence dans le vernis 4<\/strong>, <strong>dynamic surface tension 4<\/strong>, <strong>static surface tension 3<\/strong>et <strong>defoaming 0<\/strong>.<\/li>\n<li><strong>WD-D547:<\/strong> Longchang supports it for <strong>Peintures \u00e0 l&#039;eau, peintures \u00e0 solvant et sans solvant, et peintures \u00e0 s\u00e9chage UV<\/strong>. The page says it can <strong>most effectively reduce the surface tension in water system<\/strong>, a <strong>excellent mouillage et \u00e9talement<\/strong>, and also provides <strong>good anti-cratering, re-coating, defoaming, and leveling<\/strong>. Its recommendation table shows <strong>transparency in varnish 1<\/strong>, <strong>defoaming 3<\/strong>, <strong>dynamic surface tension 3<\/strong>et <strong>static surface tension 4<\/strong>.<\/li>\n<li><strong>WD-D548:<\/strong> Longchang supports it for <strong>peinture \u00e0 l&#039;eau et peinture \u00e0 base de solvant<\/strong>. The page says it can <strong>effectively reduce the surface tension<\/strong>, provides <strong>excellent mouillage et \u00e9talement<\/strong>, and adds <strong>good anti-cratering, re-coating, and leveling<\/strong>. Its recommendation table shows <strong>transparence dans le vernis 4<\/strong>, <strong>defoaming 0<\/strong>, <strong>dynamic surface tension 5<\/strong>et <strong>static surface tension 4<\/strong>.<\/li>\n<\/ul>\n<p>That is enough differentiation to justify a dedicated comparison page for real buyer screening.<\/p>\n<h2>Quick comparison table: WD-D545 vs WD-D547 vs WD-D548<\/h2>\n<table>\n<thead>\n<tr>\n<th>Facteur d'achat<\/th>\n<th>WD-D545<\/th>\n<th>WD-D547<\/th>\n<th>WD-D548<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Fen\u00eatre syst\u00e8me principale prise en charge<\/td>\n<td>Water-borne wood, industrial, and plastic paint<\/td>\n<td>Water-borne paint, solvent and solvent-free paint, UV-cure paint<\/td>\n<td>Water-borne paint, solvent-based paint<\/td>\n<\/tr>\n<tr>\n<td>Meilleur premier emploi<\/td>\n<td>Waterborne substrate wetting with high transparency and strong surface-tension reduction<\/td>\n<td>Cross-system wetting route with anti-cratering, recoating, defoaming, and leveling support<\/td>\n<td>Fast dynamic wetting in water-borne or solvent-based paints with broader dosage flexibility<\/td>\n<\/tr>\n<tr>\n<td>Suggested addition<\/td>\n<td>0.1% to 0.5% of total formulation<\/td>\n<td>0.1% to 0.5% of total formulation<\/td>\n<td>0,1% \u00e0 1,0% de la formulation totale<\/td>\n<\/tr>\n<tr>\n<td>Directly supported special note<\/td>\n<td>At 0.2% in water, surface tension of water can be reduced to 20.5 mN\/m<\/td>\n<td>Good anti-cratering, re-coating, defoaming, and leveling<\/td>\n<td>Dynamic surface-tension score 5 and may freeze at lower temperature<\/td>\n<\/tr>\n<tr>\n<td>Transparency in varnish score<\/td>\n<td>4<\/td>\n<td>1<\/td>\n<td>4<\/td>\n<\/tr>\n<tr>\n<td>Dynamic \/ static surface tension score<\/td>\n<td>4 \/ 3<\/td>\n<td>3 \/ 4<\/td>\n<td>5 \/ 4<\/td>\n<\/tr>\n<tr>\n<td>Defoaming score<\/td>\n<td>0<\/td>\n<td>3<\/td>\n<td>0<\/td>\n<\/tr>\n<tr>\n<td>Low-temperature handling watchpoint<\/td>\n<td>Freeze may occur at low temperature, but clarity and flow return after heating<\/td>\n<td>No special freeze note stated on page<\/td>\n<td>May be frozen at lower temperature, but becomes transparent and flowing after heating or solvent dilution<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Quand WD-D545 est le meilleur premier pas<\/h2>\n<p>WD-D545 belongs earlier when the project is clearly a <strong>waterborne substrate-wetting problem<\/strong> rather than a broad cross-system defect problem. Longchang supports it specifically for <strong>peinture \u00e0 l&#039;eau pour bois, peinture industrielle \u00e0 l&#039;eau et peinture \u00e0 l&#039;eau pour plastique<\/strong>, which is already a strong buying signal. The same page also gives the clearest direct surface-tension statement of the three: at <strong>0,2% dans l&#039;eau<\/strong>, the surface tension of water can be reduced to <strong>20,5 mN\/m<\/strong>.<\/p>\n<p>WD-D545 should move up first when:<\/p>\n<ul>\n<li>the coating line is firmly <strong>waterborne<\/strong>,<\/li>\n<li>the buyer is screening for <strong>wood, industrial, or plastic paint<\/strong> rather than UV-cure ink or solvent-free routes,<\/li>\n<li><strong>varnish transparency<\/strong> matters more than secondary defoaming help, or<\/li>\n<li>the team wants the cleaner first benchmark for <strong>wetting and spreading<\/strong> without leaning on additional anti-cratering or defoaming claims.<\/li>\n<\/ul>\n<p>The watchpoint is practical. Longchang notes that <strong>freeze may occur at low temperatures<\/strong>, but the product will become <strong>transparent and flowing again after heating<\/strong> without affecting quality. That matters for shipping, winter storage, and plant-side handling.<\/p>\n<h2>When WD-D547 is the better first move<\/h2>\n<p>WD-D547 belongs earlier when the buyer needs the <strong>broadest supported application window<\/strong> and wants one wetting route that already carries more explicit secondary defect-control language. Longchang supports it across <strong>Peintures \u00e0 l&#039;eau, peintures \u00e0 solvant et sans solvant, et peintures \u00e0 s\u00e9chage UV<\/strong>. That makes it the broadest system-fit route of the three.<\/p>\n<p>The same product page also says WD-D547 gives <strong>good performance of anti-cratering, re-coating, defoaming, as well as leveling<\/strong>. This is a real separation point. Many buyers are not only solving wetting, they are also trying to stabilize crater behavior or recoating performance without moving into a different additive family too early.<\/p>\n<p>WD-D547 should move up first when:<\/p>\n<ul>\n<li>the plant needs one route that can be sampled across <strong>water-borne, solvent, solvent-free, and UV-cure<\/strong> programs,<\/li>\n<li>la liste des d\u00e9fauts comprend <strong>wetting plus anti-cratering or recoating concerns<\/strong>,<\/li>\n<li>some <strong>defoaming support<\/strong> is useful in the same trial window, or<\/li>\n<li>the buyer wants a compatibility-first benchmark before narrowing into a more transparent or more dynamic-wetting route.<\/li>\n<\/ul>\n<p>The tradeoff is visible in the recommendation table. WD-D547 has a <strong>transparency in varnish score of 1<\/strong>, lower than WD-D545 and WD-D548. Buyers working on clear varnishes or appearance-sensitive systems should keep that in view during screening.<\/p>\n<h2>When WD-D548 is the better first move<\/h2>\n<p>WD-D548 deserves earlier review when the line lives in <strong>water-borne or solvent-based paint<\/strong> and the buyer wants a route with stronger supported <strong>dynamic wetting<\/strong> and a broader dosing window. Longchang gives WD-D548 a <strong>dynamic surface tension score of 5<\/strong>, which is the strongest of the three, while also listing <strong>static surface tension 4<\/strong> et <strong>transparence dans le vernis 4<\/strong>.<\/p>\n<p>That makes WD-D548 a strong first route when:<\/p>\n<ul>\n<li>the substrate has to be wetted under <strong>fast application conditions<\/strong>,<\/li>\n<li>the buyer still wants <strong>anti-cratering, recoating, and leveling<\/strong> support,<\/li>\n<li>the line is <strong>water-borne or solvent-based<\/strong> but not necessarily UV-cure or solvent-free, or<\/li>\n<li>the formulator wants a little more dosage room at <strong>0,1% \u00e0 1,0%<\/strong> instead of stopping at 0.5%.<\/li>\n<\/ul>\n<p>Longchang also notes a low-temperature handling watchpoint here. WD-D548 <strong>may be frozen at lower temperature<\/strong>, but becomes <strong>transparent and flowing after heating or after dilution with solvent<\/strong>. That is operationally useful information for plant-side handling.<\/p>\n<h2>How buyers should choose between these three wetting routes<\/h2>\n<h3>1. Start with the system boundary before the recommendation scores<\/h3>\n<p>If the project is tightly waterborne and sits in wood, industrial, or plastic coating work, WD-D545 usually deserves an earlier look than WD-D547. If the plant wants one sample route that can travel into solvent-free and UV-cure work too, WD-D547 is the stronger first benchmark. If the job is in water-borne or solvent-based paint and dynamic wetting speed matters more, WD-D548 becomes more attractive.<\/p>\n<h3>2. Separate pure wetting jobs from mixed defect-control jobs<\/h3>\n<p>WD-D545 is the cleaner fit when the buyer mainly wants <strong>strong wetting and spreading with better transparency<\/strong>. WD-D547 is stronger when the defect list includes <strong>anti-cratering, recoating, defoaming, and leveling<\/strong> in the same conversation. WD-D548 sits between them, adding <strong>good anti-cratering and recoating support<\/strong> with a stronger dynamic-wetting score.<\/p>\n<h3>3. Use dynamic and static surface tension scores the right way<\/h3>\n<p>External industry framing commonly separates <strong>tension superficielle dynamique<\/strong>, which matters during fast liquid application and fresh interface formation, from <strong>static surface tension<\/strong>, which matters once the liquid has had more time to settle. That framing helps explain why WD-D548 can be a better first trial when fast spreading matters, while WD-D547 can still remain attractive for more balanced static wetting plus secondary defect support. The actual product-choice facts above still come from the Longchang product pages.<\/p>\n<h3>4. Keep transparency visible if the system is appearance-sensitive<\/h3>\n<p>For clear varnishes and appearance-sensitive systems, the difference between a <strong>transparency score of 4<\/strong> and a <strong>score of 1<\/strong> is not trivial. That is one reason WD-D545 or WD-D548 may move ahead of WD-D547 in some clear-system screens.<\/p>\n<h3>5. Keep low-temperature handling visible in real-world supply decisions<\/h3>\n<p>Both WD-D545 and WD-D548 include explicit low-temperature freeze notes, but both product pages also state that clarity and flow return after heating, and in WD-D548\u2019s case also after solvent dilution. That does not kill the product choice, but it does matter for inventory handling and winter shipments.<\/p>\n<h2>Itin\u00e9raire recommand\u00e9 pour Longchang \u00e0 partir de cette page<\/h2>\n<ul>\n<li><strong>Waterborne wood, industrial, and plastic paint route:<\/strong> <a href=\"https:\/\/longchangchemical.com\/fr\/product\/agesin-wd-d545\/\">CHLUMICRYL\u00ae WD-D545<\/a><\/li>\n<li><strong>Cross-system wetting plus anti-cratering route:<\/strong> <a href=\"https:\/\/longchangchemical.com\/fr\/product\/agesin-wd-d547-wetting-agent\/\">CHLUMICRYL\u00ae WD-D547<\/a><\/li>\n<li><strong>Fast dynamic wetting route for water-borne or solvent-based paint:<\/strong> <a href=\"https:\/\/longchangchemical.com\/fr\/product\/agesin-wd-d548\/\">CHLUMICRYL\u00ae WD-D548<\/a><\/li>\n<li><strong>Aper\u00e7u du cluster\u00a0:<\/strong> <a href=\"https:\/\/longchangchemical.com\/fr\/chlumicryl-coating-ink-additives\/\">CHLUMICRYL\u00ae Additifs pour rev\u00eatements et encres<\/a><\/li>\n<li><strong>Page de fonction associ\u00e9e\u00a0:<\/strong> <a href=\"https:\/\/longchangchemical.com\/fr\/wetting-additives-coatings-inks\/\">Comment choisir les additifs mouillants pour les rev\u00eatements, les encres et les supports difficiles<\/a><\/li>\n<li><strong>Related defect-routing page:<\/strong> <a href=\"https:\/\/longchangchemical.com\/fr\/coating-defect-additive-selection\/\">Additif mouillant vs additif de nivellement vs antimousse vs tensioactif fluor\u00e9<\/a><\/li>\n<li><strong>Related flow page:<\/strong> <a href=\"https:\/\/longchangchemical.com\/fr\/uv-coating-flow-leveling\/\">Comment am\u00e9liorer la fluidit\u00e9 et le nivellement des rev\u00eatements UV<\/a><\/li>\n<\/ul>\n<h2>FAQ<\/h2>\n<h3>Which wetting additive should I test first for waterborne wood coatings?<\/h3>\n<p>Usually WD-D545, because Longchang directly supports it for water-borne wood paint and gives it strong wetting and spreading language plus a direct 20.5 mN\/m surface-tension statement at 0.2% in water.<\/p>\n<h3>When should WD-D547 move ahead of WD-D545?<\/h3>\n<p>WD-D547 should move ahead when the project needs one route that can cross water-borne, solvent, solvent-free, and UV-cure paint systems, or when the defect list also includes anti-cratering, recoating, defoaming, and leveling.<\/p>\n<h3>Why would WD-D548 be the better fit for fast application conditions?<\/h3>\n<p>Because Longchang gives it the strongest dynamic surface-tension recommendation score of the three. That makes it a sensible first route when rapid substrate wetting matters during application.<\/p>\n<h3>Is WD-D547 the best route for clear varnishes?<\/h3>\n<p>Not automatically. Its current transparency-in-varnish score is lower than WD-D545 and WD-D548, so clear-system buyers should verify that tradeoff during screening.<\/p>\n<h3>Do the freeze notes on WD-D545 and WD-D548 mean they are unsuitable?<\/h3>\n<p>No. The current product pages state that clarity and flow return after heating, and WD-D548 can also recover after solvent dilution. The note is mainly an operational handling watchpoint.<\/p>\n<h2>Need a shorter wetting shortlist?<\/h2>\n<p>If the team already knows the problem is substrate wetting, do not stop at a generic wetting-additive page. Separate the first sample route by <strong>system boundary<\/strong>, <strong>secondary defect needs<\/strong>et <strong>dynamic-wetting priority<\/strong>. That usually makes the wetting shortlist much cleaner and much cheaper to test.<\/p>","protected":false},"excerpt":{"rendered":"<p>Compare CHLUMICRYL\u00ae WD-D545, WD-D547, and WD-D548 for wetting-additive selection in waterborne wood and plastic coatings, solvent or solvent-free coatings, and UV-cure systems.<\/p>","protected":false},"author":6,"featured_media":10526,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-10525","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.3.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>WD-D545 vs WD-D547 vs WD-D548 for Wetting Additive Selection<\/title>\n<meta name=\"description\" content=\"Compare WD-D545, WD-D547, and WD-D548 by application system, dynamic and static wetting behavior, 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