{"id":4063,"date":"2026-02-21T00:32:46","date_gmt":"2026-02-20T16:32:46","guid":{"rendered":"https:\/\/www.hkejw.com\/%e6%9c%aa%e5%88%86%e9%a1%9e\/application-of-sika-waterproof-materials-in-aluminium-window-projects-comprehensive-guide-to-professional-water-seepage-prevention\/"},"modified":"2026-06-23T04:27:41","modified_gmt":"2026-06-22T20:27:41","slug":"application-of-sika-waterproof-materials-in-aluminium-window-projects-comprehensive-guide-to-professional-water-seepage-prevention","status":"publish","type":"post","link":"https:\/\/www.hkejw.com\/en\/am-information\/application-of-sika-waterproof-materials-in-aluminium-window-projects-comprehensive-guide-to-professional-water-seepage-prevention\/","title":{"rendered":"Application of Sika Waterproof Materials in Aluminium Window Projects: Comprehensive Guide to Professional Water Seepage Prevention"},"content":{"rendered":"[vc_row type=&#8221;in_container&#8221; full_screen_row_position=&#8221;middle&#8221; column_margin=&#8221;default&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; scene_position=&#8221;center&#8221; text_color=&#8221;dark&#8221; text_align=&#8221;left&#8221; row_border_radius=&#8221;none&#8221; row_border_radius_applies=&#8221;bg&#8221; row_position_desktop=&#8221;default&#8221; row_position_tablet=&#8221;inherit&#8221; row_position_phone=&#8221;inherit&#8221; overflow=&#8221;visible&#8221; overlay_strength=&#8221;0.3&#8243; gradient_direction=&#8221;left_to_right&#8221; shape_divider_position=&#8221;bottom&#8221; bg_image_animation=&#8221;none&#8221;][vc_column column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; flex_gap_desktop=&#8221;10px&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; column_position=&#8221;default&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/1&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]In Hong Kong, thousands of water seepage complaints are received every typhoon season. According to Buildings Department statistics, aluminium window frames and window sills are among the primary sources of residential water seepage, accounting for over 30% of all cases. <strong>Sika waterproof<\/strong> materials are widely used in the industry, yet many property owners still have only a partial understanding of product selection, application methods, and critical precautions. This often leads to recurrent leakage shortly after repairs. This article, written from the practical perspective of experienced aluminium window engineering professionals, systematically analyses the characteristics of Sika waterproof products, the selection logic for aluminium window waterproof materials, and the correct construction procedures for window water seepage prevention, helping property owners and building management make informed decisions.<\/p>\n<h2 id=\"table-of-contents\">Table of Contents<\/h2>\n<p><\/p>\n<ul>\n<li><a href=\"#sika-waterproof-materials-overview\">Overview of Sika Waterproof Materials<\/a><\/li>\n<li><a href=\"#aluminium-window-waterproof-material-selection\">Selection Logic for Aluminium Window Waterproof Materials<\/a><\/li>\n<li><a href=\"#window-water-seepage-prevention-process\">Window Water Seepage Prevention Construction Process<\/a><\/li>\n<li><a href=\"#common-construction-errors\">Common Construction Errors and Consequences<\/a><\/li>\n<li><a href=\"#sika-product-comparison\">Sika Waterproof Product Comparison<\/a><\/li>\n<li><a href=\"#mandatory-window-inspection-relationship\">Relationship Between Mandatory Window Inspection Scheme and Waterproofing Works<\/a><\/li>\n<li><a href=\"#faq\">Frequently Asked Questions<\/a><\/li>\n<\/ul>\n<p><\/p>\n<h2 id=\"key-highlights\">Key Highlights<\/h2>\n<p><\/p>\n<table>\n<thead>\n<tr>\n<th>Key Insights<\/th>\n<th>Detailed Explanation<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Sika offers a wide range of waterproof products with distinct applications<\/td>\n<td>Sikaflex, SikaTop, and Sika Waterproofing Coating each serve specific purposes. Sikaflex sealant series is commonly used in aluminium window projects; not all Sika products are suitable for window frame joints.<\/td>\n<\/tr>\n<tr>\n<td>Substrate preparation is the decisive factor for waterproofing effectiveness<\/td>\n<td>If old silicone, dirt, and loose cement are not thoroughly removed before application, even high-quality waterproof materials will suffer from poor adhesion, often failing after just one or two typhoon seasons.<\/td>\n<\/tr>\n<tr>\n<td>Window frame-to-wall joints require layered treatment<\/td>\n<td>Relying solely on outer sealant cannot resolve structural seepage. A complete waterproof system combining inner joint filling and waterproof coating is essential.<\/td>\n<\/tr>\n<tr>\n<td>Temperature and humidity significantly affect construction quality<\/td>\n<td>Sika sealants cure abnormally under high humidity or temperatures below 5\u00b0C. Special attention to ventilation and sun shading is required during summer construction in Hong Kong to prevent premature surface skinning.<\/td>\n<\/tr>\n<tr>\n<td>Mandatory window inspection does not equal waterproofing works<\/td>\n<td>The Buildings Department\u2019s Mandatory Window Inspection Scheme compliance report only covers window safety; waterproof repairs must be arranged separately. Both are indispensable.<\/td>\n<\/tr>\n<tr>\n<td>Use materials meeting recognised standards<\/td>\n<td>For maintenance works in Hong Kong public housing and private estates, sealants complying with ISO 11600 or ASTM C920 standards are recommended. Many Sika products meet these requirements.<\/td>\n<\/tr>\n<tr>\n<td>DIY application risks are often underestimated<\/td>\n<td>Common issues in owner self-application include wrong product selection, insufficient joint depth, and failure to use backer rods, resulting in overly thick sealant that cannot cure properly and provides only false waterproofing.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><\/p>\n<h2 id=\"sika-waterproof-materials-overview\">Overview of Sika Waterproof Materials<\/h2>\n<p>Sika is a global Swiss construction chemicals brand with over fifty years of history in the Hong Kong building and maintenance market. In aluminium window projects, <strong>Sika waterproof<\/strong> products mainly fall into three categories: polyurethane sealants (Sikaflex series), polymer-modified cementitious waterproof coatings (SikaTop series), and transparent waterproof coatings (Sika Transparent Coating series). Each type differs significantly in chemical composition, suitable substrates, and durability.<\/p>\n<p>A common misconception is that all Sika products are suitable for joints between aluminium window frames and concrete walls. SikaTop series are rigid waterproof coatings suitable for large-area concrete surfaces but not for window frame joints that require elasticity and movement accommodation. Incorrect selection will cause cracking due to thermal expansion and contraction of the window frame, with seepage recurring within months.<\/p>\n<p>The correct choice is high-elasticity, weather-resistant products with excellent adhesion to both aluminium and concrete, such as <strong>Sikaflex-221<\/strong> or <strong>Sikaflex-291<\/strong>. The former is suitable for general joint sealing, while the latter offers superior resistance to seawater and UV exposure, making it ideal for exposed window frames in high-rise coastal residential buildings in Hong Kong.<\/p>\n<h3>Sika Waterproof Coatings for Window Sill Applications<\/h3>\n<p>Window sill seepage is one of the most common issues in older Hong Kong buildings, especially private residential properties over twenty years old. Concrete window sills suffer long-term rainwater erosion and aging of the original waterproof layer. Comprehensive repair often requires SikaTop-107 Seal. The application method involves mixing SikaTop-107 Seal with water, then applying it in two to three coats on the cleaned concrete surface. Each coat must dry before applying the next, forming a continuous seamless waterproof membrane.<\/p>\n<p>In practice, many contractors apply only one coat to shorten the schedule, resulting in insufficient membrane thickness that cannot withstand typhoon rain pressure. According to Sika\u2019s official technical guidelines, the total recommended thickness of SikaTop-107 Seal should not be less than 2 mm, with layered application ensuring uniform thickness.<\/p>\n<figure><\/figure>\n<p><\/p>\n<figure><\/figure>\n<p><\/p>\n<h2 id=\"aluminium-window-waterproof-material-selection\">Selection Logic for Aluminium Window Waterproof Materials<\/h2>\n<p>The market offers numerous <strong>aluminium window waterproof materials<\/strong>, including Dow Corning silicone sealants, GE Momentive, Tremco, and others. However, brand is not the only consideration; the chemical type must match the substrate and environmental conditions.<\/p>\n<p>Common sealant types for aluminium window projects are silicone, polyurethane, and polysulfide. Silicone offers the best weather resistance for exposed joints but cannot be painted and is difficult to repair; polyurethane provides strong adhesion and paintability, suitable for interior and semi-exposed areas; polysulfide excels in elasticity and chemical resistance, often used in structural joints.<\/p>\n<h3>Influence of Different Substrates on Waterproof Material Selection<\/h3>\n<p>Joints between aluminium window frames and walls involve two very different materials: smooth aluminium alloy with high thermal expansion and porous, water-absorbent concrete. The selected sealant must provide strong adhesion to both while possessing sufficient elasticity to accommodate dynamic joint movement.<\/p>\n<p>A common mistake is using cheap acetic-cure silicone (recognisable by its pungent vinegar smell) directly on aluminium frames. Acetic acid released during curing corrodes the protective oxide layer on aluminium, leading to long-term corrosion spots and adhesion failure. The correct approach is to use neutral or non-acetic sealants. The Sikaflex series, being polyurethane-based and acetic-free, is suitable for direct contact with aluminium alloy.<\/p>\n<p>Additionally, if the joint width exceeds 20 mm, filling with sealant alone will prevent proper curing at the centre. The correct method is to first insert an appropriately sized polyethylene backer rod to control the depth-to-width ratio (generally 1:2), then apply the sealant to ensure complete curing and optimal elasticity.<\/p>\n<p><strong>Tip:<\/strong> Before construction, perform a small adhesion test on both aluminium frame and concrete substrate. After 24 hours, peel by hand and check for cohesive failure (break within the sealant). Adhesive failure (break at the interface) indicates insufficient substrate preparation or incorrect product selection, requiring re-treatment.<\/p>\n<h2 id=\"window-water-seepage-prevention-process\">Window Water Seepage Prevention Construction Process<\/h2>\n<p><strong>Window water seepage prevention<\/strong> engineering is far more than simply applying a bead of sealant around the window frame. Based on EJW\u2019s extensive practical experience, a complete professional seepage prevention process consists of six essential steps.<\/p>\n<p>The first step is thorough substrate cleaning. All old sealant must be completely removed using a utility knife and specialised cleaners. Residual old sealant is the primary cause of new sealant adhesion failure. After removal, clean both sides of the joint with a wire brush and solvent (such as alcohol or dedicated primer cleaner) to ensure a dust-free, grease-free, and loose-material-free surface.<\/p>\n<h3>Necessity of Primer Application<\/h3>\n<p>Whether a primer is required before applying sealant depends on the substrate and chosen sealant. Using Sika Primer-3 N with Sikaflex series significantly enhances adhesion on concrete, brickwork, and some metal surfaces. In typical older Hong Kong buildings where concrete has become porous due to weathering, primer penetrates and strengthens the surface, providing a superior bonding base.<\/p>\n<p>Many teams skip primer to save time and cost. While this may have limited impact on new materials, it is often a major cause of waterproofing failure in older buildings. The cost of primer is negligible compared to sealant, yet its effect on long-term durability is substantial.<\/p>\n<h3>Sealant Application and Surface Finishing<\/h3>\n<p>Apply sealant evenly with a caulking gun, ensuring no air bubbles or breaks. Immediately after application, tool the surface with a soap-water-dipped tool or spatula to create a slight concave profile. This helps direct rainwater away from the joint centre. Do not disturb the sealant before full curing. Sikaflex-221 typically achieves skin formation in 60\u201390 minutes and full cure in 24\u201372 hours, depending on temperature and humidity.<\/p>\n<p>The final step is water-tightness testing: spray water continuously on the joints for at least five minutes using a hose and carefully inspect for leaks from inside. This critical verification step is often omitted in the industry but is the most direct way to confirm effectiveness.<\/p>\n<figure><\/figure>\n<p><\/p>\n<h2 id=\"common-construction-errors\">Common Construction Errors and Consequences<\/h2>\n<p><\/p>\n<h3 id=\"ejw-diy\">During actual window inspections and repair works, EJW technicians consistently observe recurring construction error patterns. These occur not only in DIY cases but also with unlicensed or inexperienced contractors.<\/h3>\n<p>The most common error is \u201clayering\u201d \u2014 applying new sealant directly over old sealant without removal. Adhesion between new and old layers is far weaker than on a clean substrate. While it may look complete, the sealant often detaches entirely during the first typhoon season. Another frequent issue is insufficient sealant thickness, especially at the top of window frames (lintel position), where application is difficult and thickness is often only 2\u20133 mm, inadequate to resist wind and water pressure from typhoons.<\/p>\n<h3>Ignoring Internal Structural Seepage Paths<\/h3>\n<p>Many owners focus only on external joints while overlooking seepage through micro-cracks or capillary action within the wall. In such cases, repairing only the outer joint cannot solve the root problem. Internal wall waterproofing and proper window sill drainage slope must also be addressed.<\/p>\n<p>An effective approach is to apply an elastic waterproof coating on interior window sills and lintels while repairing external joints, creating a dual-line defence. Even if the outer layer is occasionally damaged, the inner layer prevents water from reaching interior finishes. This \u201cdouble defence\u201d concept is now standard in high-end residential repairs and is particularly important in Hong Kong\u2019s typhoon-prone climate.<\/p>\n<p><strong>Tip:<\/strong> If seepage is suspected to originate from the wall rather than frame joints, use a handheld thermal imager or moisture meter on rainy days. Moist areas show lower temperature and significantly higher humidity readings, helping accurately locate the source and avoid wasteful blind repairs.<\/p>\n<h2 id=\"sika-product-comparison\">Sika Waterproof Product Comparison<\/h2>\n<p>The following comparison table evaluates the three most commonly used Sika products for aluminium window waterproofing across suitable locations, movement capability, and expected service life, assisting owners and engineers in selection.<\/p>\n<table>\n<thead>\n<tr>\n<th>Product Name<\/th>\n<th>Most Suitable Locations and Uses<\/th>\n<th>Movement Capability and Expected Service Life<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Sikaflex-221 (Polyurethane Sealant)<\/td>\n<td>Exposed joints between aluminium window frames and walls, lintels, and window sill perimeters; suitable for aluminium alloy, concrete, and brick substrates<\/td>\n<td>Movement \u00b125%. With correct application, service life approximately 10\u201315 years. Paintable. Suitable for general residential environments in Hong Kong.<\/td>\n<\/tr>\n<tr>\n<td>SikaTop-107 Seal (Polymer-Modified Cementitious Waterproof Coating)<\/td>\n<td>Overall window sill waterproofing, large-area concrete wall repair; not suitable for joints with dynamic movement<\/td>\n<td>Rigid coating with limited movement. Suitable for concrete surfaces without significant cracks. Service life generally 8\u201312 years depending on thickness.<\/td>\n<\/tr>\n<tr>\n<td>Sika Transparent Waterproofing Coating<\/td>\n<td>Penetrating waterproofing for tile gaps around window frames and overall brick facade protection; does not alter appearance<\/td>\n<td>Penetrating protection with no visible thickness. Service life 5\u20138 years. Suitable for aesthetic-conscious facade repair projects.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The comparison clearly shows that no single product can address all aluminium window waterproofing needs. A complete waterproofing solution typically requires the combined use of at least two different product types to provide optimal protection for different locations and functional requirements.<\/p>\n<blockquote><p>\u201cThe effectiveness of waterproofing works depends on the overall system design rather than the performance of a single material. Even with the highest-grade Sika products, results will be disappointing without correct application procedures and a comprehensive waterproofing system concept.\u201d (Sika AG Official Technical White Paper, 2022 Edition)<\/p><\/blockquote>\n<p><\/p>\n<h2 id=\"mandatory-window-inspection-relationship\">Relationship Between Mandatory Window Inspection Scheme and Waterproofing Works<\/h2>\n<p>Under the Hong Kong Buildings Ordinance (Cap. 123), private buildings aged 10 years or above must undergo mandatory window inspection. The Buildings Department\u2019s Mandatory Window Inspection Scheme requires qualified persons to inspect window safety and submit written reports. However, many owners mistakenly believe that passing the inspection means the windows have no issues.<\/p>\n<p>In reality, the assessment focuses on structural safety, including hinges, locks, and frame fixings, rather than waterproof performance. A window may pass safety assessment while suffering from serious seepage problems. The evaluation criteria are entirely different.<\/p>\n<h3>How Window Inspection Reports Identify Potential Seepage Risks<\/h3>\n<p>EJW\u2019s computer-generated window inspection reports detail the condition of each window\u2019s joints, degree of sealant aging, and water stain marks around frames. Although not mandatory under the scheme, this information serves as an early warning system, allowing owners to arrange waterproof repairs before problems affect interior finishes.<\/p>\n<p>In practice, EJW technicians find that approximately 40% of windows rated \u201cpass\u201d in mandatory inspections still exhibit varying degrees of sealant aging or joint defects. Without timely treatment, the probability of seepage within three to five years is high. This highlights the importance of combining mandatory inspection with professional waterproof assessment.<\/p>\n<p>When arranging mandatory window inspection, owners are advised to request simultaneous assessment of waterproof conditions. The report should clearly list locations requiring waterproof repair and recommended materials. This ensures windows meet standards in both safety and waterproofing aspects. EJW is committed to recommending only genuinely necessary repairs without exaggeration, ensuring owners do not pay for unnecessary works.<\/p>\n<h2 id=\"faq\">Frequently Asked Questions<\/h2>\n<p><\/p>\n<h3>What is the difference between Sika sealants and ordinary silicone sealants?<\/h3>\n<p>Sika Sikaflex series belongs to the polyurethane system. The main differences from ordinary silicone are: polyurethane sealants are paintable, offer stronger adhesion to porous substrates (such as concrete and brick), and are acetic-free, so they will not corrode aluminium alloy. While ordinary silicone has good weather resistance, it cannot be painted and has weaker adhesion on damp substrates. If construction environment control is inadequate, adhesion failure easily occurs. For joints between aluminium window frames and concrete walls, Sikaflex series is the more suitable choice.<\/p>\n<h3>How many years after waterproofing works is re-treatment required?<\/h3>\n<p>High-quality Sika sealant applied with correct procedures generally lasts 10\u201315 years in Hong Kong\u2019s climate. Actual service life is affected by factors such as window frame movement, solar exposure, and typhoon frequency. Visual inspection every 5\u20137 years is recommended. If cracking, edge detachment, or loss of elasticity is found, repairs should be arranged immediately rather than waiting for visible seepage, as interior damage costs often far exceed repair expenses.<\/p>\n<h3 id=\"diy\">Can owners purchase Sika products and perform DIY repairs?<\/h3>\n<p>Technically feasible, but with considerable risks. Products like Sikaflex are available in hardware stores, but correct application involves multiple steps including old sealant removal, primer treatment, backer rod installation, and surface finishing. Errors in any step will compromise results. More importantly, owners often cannot accurately identify the seepage source. If the problem lies in the wall structure rather than the outer joint, DIY outer sealant repair only treats the symptom. It is advisable to engage professionals for assessment when the seepage source is unclear before deciding on the repair plan.<\/p>\n<h3>Who bears the cost if seepage is found after mandatory window inspection?<\/h3>\n<p>Under current Hong Kong law, window repair and waterproofing costs are generally borne by the owner. In managed estates, waterproofing of external walls and common areas may be covered by management fees, but individual unit window sealing and waterproofing usually fall under owner responsibility. Owners should first check the Deed of Mutual Covenant with the Owners\u2019 Corporation or management company to understand cost-sharing arrangements before deciding whether to engage contractors independently.<\/p>\n<h3>After a typhoon, should window seepage be repaired immediately or after drying?<\/h3>\n<p>If seepage is found after a typhoon, immediate temporary protection (such as using towels to absorb water and protect furniture) should be arranged. However, formal waterproof repairs must wait until walls and frames are completely dry. Applying sealant or coating on damp substrates greatly reduces adhesion, resulting in ineffective repairs. It is generally recommended to schedule professional works only after three to five consecutive sunny days to ensure substrate dryness meets construction requirements.<\/p>\n<h2 id=\"references\">References<\/h2>\n<p><\/p>\n<ul>\n<li><a href=\"https:\/\/www.buildingauthority.gov.hk\" rel=\"nofollow noopener\" target=\"_blank\">Hong Kong Buildings Department Official Website: Mandatory Window Inspection Scheme and Buildings Ordinance<\/a><\/li>\n<li><a href=\"https:\/\/www.sika.com\" rel=\"nofollow noopener\" target=\"_blank\">Sika AG Official Website: Technical Data and Application Guidelines for Sika Waterproofing and Sealant Products<\/a><\/li>\n<li><a href=\"https:\/\/www.astm.org\" rel=\"nofollow noopener\" target=\"_blank\">ASTM International: International Testing Standards for Building Sealants and Waterproof Materials (including ASTM C920)<\/a><\/li>\n<li><a href=\"https:\/\/www.iso.org\" rel=\"nofollow noopener\" target=\"_blank\">International Organization for Standardization (ISO): Performance Classification Standards for Building Joint Sealants (ISO 11600)<\/a><\/li>\n<\/ul>\n[\/vc_column_text][\/vc_column][\/vc_row]\n","protected":false},"excerpt":{"rendered":"<p>This in-depth analysis examines the correct application methods of Sika waterproof materials in Hong Kong aluminium window projects. It covers Sikaflex product selection logic, the full window water seepage prevention construction process, common errors, and the relationship with mandatory window inspection requirements. Written from the perspective of EJW professional engineers, this guide equips property owners with the essential knowledge to make informed decisions.<\/p>\n","protected":false},"author":1,"featured_media":3576,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rs_blank_template":"","rs_page_bg_color":"","slide_template_v7":"","footnotes":""},"categories":[30,232],"tags":[210,209,101,211],"class_list":{"0":"post-4063","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-am-information","8":"category-waterproofing","9":"tag-aluminium-window-waterproof-materials","10":"tag-sika-waterproofing","11":"tag-waterproofing-engineering","12":"tag-window-water-seepage-prevention"},"_links":{"self":[{"href":"https:\/\/www.hkejw.com\/en\/wp-json\/wp\/v2\/posts\/4063","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hkejw.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hkejw.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hkejw.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hkejw.com\/en\/wp-json\/wp\/v2\/comments?post=4063"}],"version-history":[{"count":2,"href":"https:\/\/www.hkejw.com\/en\/wp-json\/wp\/v2\/posts\/4063\/revisions"}],"predecessor-version":[{"id":4065,"href":"https:\/\/www.hkejw.com\/en\/wp-json\/wp\/v2\/posts\/4063\/revisions\/4065"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.hkejw.com\/en\/wp-json\/wp\/v2\/media\/3576"}],"wp:attachment":[{"href":"https:\/\/www.hkejw.com\/en\/wp-json\/wp\/v2\/media?parent=4063"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hkejw.com\/en\/wp-json\/wp\/v2\/categories?post=4063"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hkejw.com\/en\/wp-json\/wp\/v2\/tags?post=4063"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}