{"id":38882,"date":"2026-05-27T11:32:38","date_gmt":"2026-05-27T16:32:38","guid":{"rendered":"https:\/\/www.polywater.com\/?p=38882"},"modified":"2026-05-27T11:32:38","modified_gmt":"2026-05-27T16:32:38","slug":"protecting-crews-and-cables-with-the-right-sealant","status":"publish","type":"post","link":"https:\/\/www.polywater.com\/en\/knowledge-hub\/protecting-crews-and-cables-with-the-right-sealant\/","title":{"rendered":"Protecting Crews and Cables with the Right Sealant"},"content":{"rendered":"<div id=\"vyLightbox\"><\/div>\n<h2>Background<\/h2>\n<p>Utility line workers face ongoing challenges from wildlife and insects that can damage equipment and create hazardous working conditions. Squirrels, in particular, are a leading cause of outages, often chewing through wiring or triggering short circuits on transformers. In addition, wasp infestations\u2014especially from aggressive species like bald-faced hornets\u2014pose serious safety risks when servicing pole-top infrastructure.<\/p>\n<p>To address these issues, utilities rely on a mix of preventive and direct mitigation strategies designed to protect both equipment and personnel.<\/p>\n<p>For squirrel-related damage, common solutions include:<\/p>\n<ul>\n<li><strong>Pole Guards\/Wraps<\/strong>: Non-conductive, slick plastic barriers installed on poles to prevent animals from climbing and reaching critical equipment.<\/li>\n<li><strong>Line Guards\/Spinners<\/strong>: Rotating devices mounted on overhead lines that spin when touched, preventing animals from maintaining balance and crossing.<\/li>\n<li><strong>Chemical Sealants<\/strong>: Foam-based sealants used to close off entry points in U-guards and conduits stopping rodents from nesting or tunneling into riser poles.<\/li>\n<\/ul>\n<p>To manage wasp-related risks, linemen implement:<\/p>\n<ul>\n<li><strong>Preventive Sealing<\/strong>: Closing gaps in equipment enclosures and conduits to discourage nesting and reduce exposure to stinging insects.<\/li>\n<\/ul>\n<p>Together, these measures improve grid reliability while reducing safety risks for field crews.<\/p>\n<table style=\"width: 100%; border: 3px solid #273A80; background-color: #69c3e8; margin: 15px 0px 15px 0px;\">\n<tbody>\n<tr>\n<td style=\"padding: 20px; text-align: center;\"><a href=\"https:\/\/www.polywater.com\/en\/knowledge-hub\/keeping-rodents-out-of-critical-infrastructure\/\" target=\"_blank\" rel=\"noopener\"><strong>Related Content: <\/strong>Keeping Rodents Out of Critical Infrastructure<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Challenge<\/h2>\n<p>A utility in the southern United States experienced persistent outages caused by squirrels damaging cables. The contractor needed a sealing solution that could:<\/p>\n<ul>\n<li>Effectively block access for animals and insects<\/li>\n<li>Be quick and easy to install<\/li>\n<li>Provide a durable, long-lasting seal<\/li>\n<li>Withstand harsh weather and UV exposure<\/li>\n<li>Eliminate the need for complex tools or long cure times.<\/li>\n<\/ul>\n<p>Additionally, minimizing the time linemen spent working from aerial buckets\u2014especially in high winds\u2014was a critical safety priority.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-38890\" src=\"https:\/\/www.polywater.com\/wp-content\/uploads\/2026\/04\/Dead-squirrel-in-riser-pole-1.png\" alt=\"A dead squirrel inside a broken riser pole.\" width=\"383\" height=\"228\" srcset=\"https:\/\/www.polywater.com\/wp-content\/uploads\/2026\/04\/Dead-squirrel-in-riser-pole-1.png 383w, https:\/\/www.polywater.com\/wp-content\/uploads\/2026\/04\/Dead-squirrel-in-riser-pole-1-300x179.png 300w\" sizes=\"auto, (max-width: 383px) 100vw, 383px\" \/><\/p>\n<h2><strong>Evaluating a Solution<\/strong><\/h2>\n<p>The utility had previously specified <a href=\"https:\/\/www.polywater.com\/en\/product\/polywater-fst-foam-duct-sealant\/\" target=\"_blank\" rel=\"noopener\">Polywater\u00ae FST\u2122<\/a> for sealing vault openings. This two-part urethane system provided a reliable barrier against water ingress, particularly during storms when groundwater levels rose.<\/p>\n<p>However, for sealing U-guards on utility poles, crews needed a faster and simpler alternative. While effective, Polywater FST required more time and handling than desired for elevated work.<br \/>\nTo address this gap, the utility chose to trial <a href=\"https:\/\/www.polywater.com\/en\/product\/polywater-aft-spray-foam-sealant\/\" target=\"_blank\" rel=\"noopener\">Polywater\u00ae AFT\u2122 Spray Foam Sealant<\/a>, a faster-curing sealant designed for easier field application.<\/p>\n<table style=\"width: 100%; border: 3px solid #273A80; background-color: #69c3e8; margin: 15px 0px 15px 0px;\">\n<tbody>\n<tr>\n<td style=\"padding: 20px; text-align: center;\"><a href=\"https:\/\/www.polywater.com\/en\/knowledge-hub\/sealing-conduits-for-resilient-electrical-and-telecommunication-systems\/\" target=\"_blank\" rel=\"noopener\"><strong>Related Content: <\/strong>Sealing Conduits for Resilient Electrical and Telecommunication Systems<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Implementation and Results<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright wp-image-32996 size-medium\" src=\"https:\/\/www.polywater.com\/wp-content\/uploads\/2026\/04\/AFT-installed-in-riser-pole-1200x900p.png\" alt=\"Polywater AFT foam sealant shown sealing the top of riser poles on a wooden utility pole.\" width=\"225\" height=\"300\" \/>Field crews reported overwhelmingly positive feedback following the trial. Polywater AFT proved easy to apply and reached a functional cure within minutes, significantly reducing installation time.<\/p>\n<p>Key outcomes included:<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li>Faster application with no specialized tools required<\/li>\n<li>Reduced time spent working at height in bucket trucks<\/li>\n<li>Immediate, reliable sealing performance.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>Based on these results, the utility officially specified Polywater AFT for sealing risers on utility poles.<\/p>\n<h2>Conclusion<\/h2>\n<p>Preventing wildlife-related damage is essential for maintaining reliable power delivery. Polywater AFT provided an effective solution for sealing utility pole risers, blocking both rodent and insect intrusion.<\/p>\n<p>Its fast cure time and ease of use improved crew efficiency and safety by reducing time spent in elevated work conditions. By protecting critical cable infrastructure, Polywater AFT helps minimize outages, enhance system reliability, and support a safer working environment for utility personnel.<\/p>\n<h2>Have any questions?<\/h2>\n<p><button class=\"button button--primary\" data-micromodal-trigger=\"polywater-modal--email-us-form\">Email Us <\/button><\/p>\n<div class=\"modal micromodal-slide\" id=\"polywater-modal--email-us-form\" aria-hidden=\"true\"><div class=\"modal__overlay\" tabindex=\"-1\" data-micromodal-close><div class=\"modal__container\" role=\"dialog\" aria-modal=\"true\" aria-labelledby=\"polywater-modal--email-us-form-title\"><header class=\"modal__header\"><h2 id=\"polywater-modal--email-us-form-title\">Email Us Form<\/h2><button class=\"button--secondary modal__close\" aria-label=\"Close modal\" data-micromodal-close><\/button><\/header><div id=\"polywater-modal--email-us-form-content\"><!-- [if lte IE 8]>\r\n<script charset=\"utf-8\" type=\"text\/javascript\" src=\"\/\/js.hsforms.net\/forms\/v2-legacy.js\"><\/script>\r\n<![endif]-->\r\n<script charset=\"utf-8\" type=\"text\/javascript\" src=\"\/\/js.hsforms.net\/forms\/v2.js\"><\/script>\r\n<script>\r\nhbspt.forms.create({\r\n  region: \"na1\",\r\n  portalId: \"6060295\",\r\n  formId: \"7658eeb9-0cf9-469d-a7f1-0f033127bb9d\",\r\n  onFormReady: function (a) {\r\n    a.on('change', function(){\r\n      var zip = a.find('input[name=\"zip\"]');\r\n      if( zip ) {\r\n        if( zip.val() && zip.val().length > 4 ) {\r\n          var url = \"https:\/\/api.zippopotam.us\/us\/\" + zip.val();\r\n          var client = new XMLHttpRequest();\r\n          client.open(\"GET\", url, true);\r\n          client.onreadystatechange = function() {\r\n            if(client.readyState == 4) {\r\n              var resp = JSON.parse(client.responseText);\r\n              var city = resp.places[0]['place name'];\r\n              var state = resp.places[0]['state'];\r\n              a.find('input[name=\"city\"]').val(city);\r\n              a.find('input[name=\"state\"]').val(state);\r\n            };\r\n          };\r\n          client.send();\r\n        }\r\n      }\r\n    });\r\n  },\r\n});\r\n<\/script><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Background Utility line workers face ongoing challenges from wildlife and insects that can damage equipment and create hazardous working conditions&#8230;.<\/p>\n","protected":false},"author":8,"featured_media":38895,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"","_relevanssi_noindex_reason":"","footnotes":""},"categories":[2993,2991,2994,2997,2998,2999,3003,3004,3005],"tags":[],"industry-type":[2980,2981],"writer":[2965],"class_list":["post-38882","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-asset-life-extension","category-damage-to-field-assets","category-health-safety-2","category-system-hardening","category-asset-protection","category-critter-management","category-health-safety-3","category-content-type","category-case-study","industry-type-telecommunications","industry-type-electrical-infrastructure","writer-polywater-de-2"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Protecting Crews and Cables with the Right Sealant - Polywater<\/title>\n<meta name=\"description\" content=\"Protect crews and cables from squirrels and insects. 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