{"id":975,"date":"2015-01-26T11:33:53","date_gmt":"2015-01-26T16:33:53","guid":{"rendered":"http:\/\/www.bottompaintstore.com\/blog\/?p=975"},"modified":"2026-02-17T11:58:17","modified_gmt":"2026-02-17T16:58:17","slug":"filling-hole-fiberglass","status":"publish","type":"post","link":"https:\/\/www.bottompaintstore.com\/blog\/epoxy\/filling-hole-fiberglass\/","title":{"rendered":"Filling a Hole in Fiberglass"},"content":{"rendered":"<p class=\"post-updated\"><strong>Last Updated: February 16, 2026<\/strong><!--?php echo get_the_modified_date('F j, Y'); ?--><\/p>\r\n<!-- Quick Recommendation Box: Filling a Hole in Fiberglass -->\r\n<div class=\"bps-quick-reco\" style=\"border: 1px solid #e5e5e5; border-left: 6px solid #0a6fb5; background: #f8fbff; padding: 16px 18px; margin: 14px 0 22px; border-radius: 8px;\">\r\n<p style=\"margin: 0 0 8px; font-size: 13px; letter-spacing: .06em; text-transform: uppercase; color: #0a6fb5; font-weight: bold;\">Quick Recommendation<\/p>\r\n<h2 style=\"margin: 0 0 10px; font-size: 20px; line-height: 1.25;\">How to Fill a Hole in Fiberglass<\/h2>\r\n<ul style=\"margin: 0; padding-left: 18px; line-height: 1.6;\">\r\n<li><strong>Small holes (screw\/bolt size):<\/strong> Use <strong>marine epoxy with filler<\/strong> to seal and restore strength.<\/li>\r\n<li><strong>Larger holes:<\/strong> Rebuild with <strong>fiberglass cloth and resin<\/strong> in layers before fairing and finishing.<\/li>\r\n<li><strong>Prep properly:<\/strong> Grind or bevel the edges, clean thoroughly, and ensure the surface is dry before applying resin.<\/li>\r\n<li><strong>Bottom line:<\/strong> Structural repairs require <strong>fiberglass reinforcement first<\/strong>, then fairing and finishing with <a href=\"https:\/\/www.bottompaintstore.com\/blog\/gelcoat\/gelcoat-did-not-cure-what-caused-it-and-whats-next\/\">gelcoat<\/a> or paint.<\/li>\r\n<\/ul>\r\n<p style=\"margin: 12px 0 0; color: #555; line-height: 1.5;\"><strong>Tip:<\/strong> If the surrounding fiberglass feels soft or wet, address moisture issues before sealing the repair.<\/p>\r\n<\/div>\r\n<p>When you are trying to repair a small hole in fiberglass, the best type of product to use is a premium epoxy. This will insure a proper repair and will not allow for shrinking of the material and create a water tight seal.<\/p>\r\n<p>We recommend the <span style=\"color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"https:\/\/www.bottompaintstore.com\/hawk-epoxy-size-1-kit-p-28223.html\"><strong>Hawk Epoxy Kit<\/strong><\/a>.<\/span> It contains the epoxy resin, <a href=\"https:\/\/www.bottompaintstore.com\/blog\/gelcoat\/gelcoat-did-not-cure-what-caused-it-and-whats-next\/\">catalyst<\/a> and filler for the job. Watch the video below to see the steps needed to perform a small hole repair.<\/p>\r\n<p><iframe loading=\"lazy\" title=\"Filling Small Holes With Epoxy\" width=\"625\" height=\"352\" src=\"https:\/\/www.youtube.com\/embed\/I55CM9dhuP0?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\r\n<p>&nbsp;<\/p>\r\n\r\n<h3 class=\"wp-block-heading\">How to sand fiberglass for paint<\/h3>\r\n\r\n\r\n\r\n<p>Whether you&#8217;re trying to give your boat a new paint job or just touched up a few scratches, properly sanding fiberglass is an important step to ensure a smooth, even finish. Here&#8217;s a quick guide on how to sand fiberglass for paint:<\/p>\r\n\r\n\r\n\r\n<ol class=\"wp-block-list\">\r\n<li>Start with a coarse grit paper (40-60) to remove any existing paint or surface imperfections.<\/li>\r\n<li>Progress to a medium grit paper (80-100) to smooth out the surface.<\/li>\r\n<li>Finally, use a fine grit paper (200+) to achieve a glass-like finish.<\/li>\r\n<li>For best results, wet sanding is recommended &#8211; simply soak the sandpaper in water for 10-15 minutes before use. This will help to prevent deep scratches and gouges.<\/li>\r\n<\/ol>\r\n\r\n\r\n\r\n<p><strong>How to prep fiberglass for paint<\/strong><\/p>\r\n\r\n\r\n\r\n<p>One way to do that is to make sure the fiberglass is properly prepared for painting. Here are some tips for prepping fiberglass for paint:<\/p>\r\n\r\n\r\n\r\n<p>First, wash the area with boat soap and a soft brush. This will remove any dirt or grime that could prevent the paint from adhering properly.<\/p>\r\n\r\n\r\n\r\n<p>Next, sand the area with fine-grit sandpaper. This will create a smooth surface for the paint to adhere to.<\/p>\r\n\r\n\r\n\r\n<p>Finally, wipe down the area with a tack cloth to remove any dust from sanding.<\/p>\r\n\r\n\r\n\r\n<p>If you have additional questions feel free to reach out to the <a href=\"https:\/\/www.bottompaintstore.com\/\">Botton Paint Store<\/a> technical team 888-505-2313.<\/p>\r\n<script type=\"text\/javascript\" charset=\"utf-8\" src=\"http:\/\/w.sharethis.com\/widget\/?wp=6.9.7\"><\/script>","protected":false},"excerpt":{"rendered":"<p>Last Updated: February 16, 2026 Quick Recommendation How to Fill a Hole in Fiberglass Small holes (screw\/bolt size): Use marine epoxy with filler to seal and restore strength. Larger holes: Rebuild with fiberglass cloth and resin in layers before fairing and finishing. Prep properly: Grind or bevel the edges, clean thoroughly, and ensure the surface [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[182,272],"tags":[250,251,253,252],"class_list":["post-975","post","type-post","status-publish","format-standard","hentry","category-epoxy","category-hawk-epoxy","tag-fill-a-small-hole-in-fiberglass","tag-hawk-epoxy-repair","tag-hawk-epoxy-to-fill-a-hole","tag-repair-a-small-in-fiberglass"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.bottompaintstore.com\/blog\/wp-json\/wp\/v2\/posts\/975","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bottompaintstore.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bottompaintstore.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bottompaintstore.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bottompaintstore.com\/blog\/wp-json\/wp\/v2\/comments?post=975"}],"version-history":[{"count":7,"href":"https:\/\/www.bottompaintstore.com\/blog\/wp-json\/wp\/v2\/posts\/975\/revisions"}],"predecessor-version":[{"id":4182,"href":"https:\/\/www.bottompaintstore.com\/blog\/wp-json\/wp\/v2\/posts\/975\/revisions\/4182"}],"wp:attachment":[{"href":"https:\/\/www.bottompaintstore.com\/blog\/wp-json\/wp\/v2\/media?parent=975"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bottompaintstore.com\/blog\/wp-json\/wp\/v2\/categories?post=975"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bottompaintstore.com\/blog\/wp-json\/wp\/v2\/tags?post=975"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}