{"id":976,"date":"2026-05-02T21:40:11","date_gmt":"2026-05-02T13:40:11","guid":{"rendered":"https:\/\/mr.kuart.space\/?p=976"},"modified":"2026-05-02T22:02:47","modified_gmt":"2026-05-02T14:02:47","slug":"why-is-it-called-502-glue","status":"publish","type":"post","link":"https:\/\/mr.kuart.space\/en\/why-is-it-called-502-glue\/","title":{"rendered":"Why is it called 502 glue? A complete analysis of common number glues + a practical buying guide."},"content":{"rendered":"<p>You may use \"502 glue\" every day, but have you ever thought about:<strong>Why is it called 502? Does 502 exist abroad? What do numbers like 401 and 406 represent?<\/strong><\/p>\n<p>This article explains it all clearly and will help you understand.<strong>Differences in domestic and international terminology + Practical purchasing tips<\/strong>To avoid making the same mistakes again.<\/p>\n<hr>\n<h2>1. Why is 502 glue called \"502\"?<\/h2>\n<p>\"502\" doesn't actually have a chemical meaning, but rather...<strong>Formula number during research and development<\/strong>\u3002<\/p>\n<p>During the development process, different formulations are distinguished by numbers. When the formulation with the number \"502\" performs the best (high bonding strength, fast curing, and good stability), it is finalized and used directly as the product name.<\/p>\n<p><strong>In short:<\/strong>502 = Successful recipe number.<\/p>\n<hr>\n<h2>II. Is there any \"502 glue\" available abroad?<\/h2>\n<p><strong>There are similar products, but they are generally not called \"502\".<\/strong><\/p>\n<p>The essence of 502 glue is:<\/p>\n<ul>\n<li>cyanoacrylate glue<\/li>\n<li>Also called instant glue\/fast-drying glue<\/li>\n<\/ul>\n<p>Abroad, this type of glue is usually called:<\/p>\n<ul>\n<li><strong>Super Glue<\/strong><\/li>\n<li><strong>Instant Glue<\/strong><\/li>\n<li><strong>CA Glue\uff08Cyanoacrylate\uff09<\/strong><\/li>\n<\/ul>\n<p><strong>Key differences:<\/strong><\/p>\n<table border=\"1\" cellpadding=\"8\" data-no-auto-translation=\"\">\n<tr>\n<th>Comparison items<\/th>\n<th>China (502)<\/th>\n<th>Overseas (Super Glue)<\/th>\n<\/tr>\n<tr>\n<td>Naming conventions<\/td>\n<td>Formula number (502, 401, etc.)<\/td>\n<td>Functional naming (Super Glue)<\/td>\n<\/tr>\n<tr>\n<td>Whether to unify standards<\/td>\n<td>\u274c Inconsistent<\/td>\n<td>\u274c Not uniform<\/td>\n<\/tr>\n<tr>\n<td>User perception<\/td>\n<td>Treating \"502\" as a type of glue<\/td>\n<td>Treat \"super glue\" as a product category<\/td>\n<\/tr>\n<tr>\n<td>Product Differences<\/td>\n<td>Model distinctions are detailed (e.g., 401\/406).<\/td>\n<td>Further categorization by application (gel\/liquid, etc.)<\/td>\n<\/tr>\n<\/table>\n<p><strong>Simply put:<\/strong><\/p>\n<p style=\"font-size:18px;\"><strong>502 = Chinese name; Super Glue = international name<\/strong><\/p>\n<hr>\n<h2>III. What are some common types of digital glue?<\/h2>\n<h3>1\ufe0f\u20e3 Instant glue (most common)<\/h3>\n<table border=\"1\" cellpadding=\"8\" data-no-auto-translation=\"\">\n<tr>\n<th>model<\/th>\n<th>Features<\/th>\n<th>Applicable Scenarios<\/th>\n<\/tr>\n<tr>\n<td>502<\/td>\n<td>General-purpose type<\/td>\n<td>Routine repairs<\/td>\n<\/tr>\n<tr>\n<td>401<\/td>\n<td>It is thinner and has stronger permeability.<\/td>\n<td>Precision components<\/td>\n<\/tr>\n<tr>\n<td>406<\/td>\n<td>Suitable for rubber and plastics<\/td>\n<td>Shoes, soft materials<\/td>\n<\/tr>\n<tr>\n<td>495<\/td>\n<td>Industrial grade strength<\/td>\n<td>Structural bonding<\/td>\n<\/tr>\n<\/table>\n<p>\u26a0\ufe0f Note: Numbers vary by brand<strong>Not entirely universal<\/strong>\u3002<\/p>\n<hr>\n<h3>2\ufe0f\u20e3 AB glue (two-component)<\/h3>\n<ul>\n<li>101 \/ 102<\/li>\n<li>201 \/ 202<\/li>\n<\/ul>\n<p>\ud83d\udc49 Requires mixing; high strength but slow curing.<\/p>\n<hr>\n<h3>3\ufe0f\u20e3 Epoxy resin adhesive<\/h3>\n<ul>\n<li>E-44<\/li>\n<li>E-51<\/li>\n<\/ul>\n<hr>\n<h3>4\ufe0f\u20e3 Hot melt adhesive<\/h3>\n<ul>\n<li>HM-100<\/li>\n<li>HM-200<\/li>\n<\/ul>\n<hr>\n<h2>IV. Adhesive Selection Guide for Different Scenarios (Practical Version)<\/h2>\n<h3>\ud83e\uddf0 Routine repairs<\/h3>\n<p><strong>recommend:<\/strong>502 \/ 401<\/p>\n<hr>\n<h3>\ud83d\udc5f Shoes\/Rubber<\/h3>\n<p><strong>recommend:<\/strong>406 or shoe glue<\/p>\n<p><strong>Don't use 502 glue!<\/strong><\/p>\n<hr>\n<h3>\ud83d\udd29 Metal \/ High Strength<\/h3>\n<p><strong>recommend:<\/strong>AB glue<\/p>\n<hr>\n<h3>\ud83e\uddf4 Seam filling<\/h3>\n<p><strong>recommend:<\/strong>Epoxy Putty<\/p>\n<hr>\n<h3>\ud83d\udcf1 Precision components<\/h3>\n<p><strong>recommend:<\/strong>401 \/ 403<\/p>\n<hr>\n<h3>\ud83d\udc5c Leather (Key Point)<\/h3>\n<table border=\"1\" cellpadding=\"8\" data-no-auto-translation=\"\">\n<tr>\n<th>type of glue<\/th>\n<th>Is it recommended?<\/th>\n<th>illustrate<\/th>\n<\/tr>\n<tr>\n<td>Leather glue\/Shoe glue<\/td>\n<td>\u2705 Recommended<\/td>\n<td>Soft and flexible<\/td>\n<\/tr>\n<tr>\n<td>406<\/td>\n<td>\ud83d\udfe1 Available<\/td>\n<td>Small-scale emergency<\/td>\n<\/tr>\n<tr>\n<td>502<\/td>\n<td>\u274c Not recommended<\/td>\n<td>It will harden and crack.<\/td>\n<\/tr>\n<\/table>\n<hr>\n<h2>V. The most common pitfalls<\/h2>\n<ul>\n<li>\u274c Using super glue (502) to glue shoes \u2192 They will crack very quickly.<\/li>\n<li>\u274c Using super glue (502) on large areas \u2192 will make it brittle.<\/li>\n<li>\u274c Using super glue for structures \u2192 Not strong enough<\/li>\n<\/ul>\n<p style=\"font-size:18px;\"><strong>Core principle: Instant adhesives are responsible for \"speed,\" while structural adhesives are responsible for \"firmness.\"<\/strong><\/p>\n<hr>\n<h2>VI. Conclusion<\/h2>\n<p>Digital glue may look complicated, but the logic is actually quite simple:<\/p>\n<ul>\n<li>502 is just a formula number.<\/li>\n<li>This type of adhesive is used all over the world, but it's called by different names.<\/li>\n<li>The key to choosing adhesives is their intended use, not just the numbers.<\/li>\n<\/ul>\n<p style=\"font-size:18px;\"><strong>Remember: Choosing the right adhesive is more important than remembering the model number.<\/strong><\/p>\n<div style=\"text-align:center; margin:20px 0; border:1px solid #ddd; padding:15px; border-radius:8px; max-width:350px;\">\n  <!-- \u5f15\u5bfc\u6587\u5b57 --><\/p>\n<p style=\"font-weight:bold; font-size:16px; margin-bottom:10px;\">\n    Recommended purchase: Large capacity pack - Gorilla Instant Glue!\n  <\/p>\n<p>  <!-- \u56fe\u7247+\u94fe\u63a5 --><br \/>\n  <a href=\"https:\/\/amzn.to\/4uoDNxk\" target=\"_blank\" rel=\"nofollow noopener\"><br \/>\n    <img decoding=\"async\" src=\"https:\/\/m.media-amazon.com\/images\/I\/61dX3OUg8dL.jpg\" \n         alt=\"Gorilla Super Glue Gel XL\" \n         style=\"width:100%; max-width:300px; border-radius:5px;\" \/><br \/>\n  <\/a><\/p>\n<p>  <!-- \u8d2d\u4e70\u6309\u94ae --><\/p>\n<div style=\"margin-top:10px;\">\n    <a href=\"https:\/\/amzn.to\/4uoDNxk\" target=\"_blank\" rel=\"nofollow noopener\" style=\"display:inline-block; background-color:#FF9900; color:#fff; font-weight:bold; padding:10px 20px; border-radius:5px; text-decoration:none;\"><br \/>\n      Buy it now<br \/>\n    <\/a>\n  <\/div>\n<\/div>\n<p><strong>PS\uff1a<\/strong>As an Amazon Affiliate member, I earn commissions from qualified purchases.<\/p>","protected":false},"excerpt":{"rendered":"<p>\u4f60\u53ef\u80fd\u6bcf\u5929\u90fd\u5728\u7528\u201c502\u80f6\u6c34\u201d\uff0c\u4f46&#8230;<\/p>","protected":false},"author":1,"featured_media":-1,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[29],"tags":[101,100],"class_list":["post-976","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-29","tag-101","tag-100","wpcat-29-id"],"views":12,"_links":{"self":[{"href":"https:\/\/mr.kuart.space\/en\/wp-json\/wp\/v2\/posts\/976","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mr.kuart.space\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mr.kuart.space\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mr.kuart.space\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mr.kuart.space\/en\/wp-json\/wp\/v2\/comments?post=976"}],"version-history":[{"count":5,"href":"https:\/\/mr.kuart.space\/en\/wp-json\/wp\/v2\/posts\/976\/revisions"}],"predecessor-version":[{"id":983,"href":"https:\/\/mr.kuart.space\/en\/wp-json\/wp\/v2\/posts\/976\/revisions\/983"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mr.kuart.space\/en\/wp-json\/"}],"wp:attachment":[{"href":"https:\/\/mr.kuart.space\/en\/wp-json\/wp\/v2\/media?parent=976"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mr.kuart.space\/en\/wp-json\/wp\/v2\/categories?post=976"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mr.kuart.space\/en\/wp-json\/wp\/v2\/tags?post=976"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}