{"product_id":"mypond-ms300-marine-sealant-underwater-cure-4x-stronger-than-silicone-300ml","title":"MyPond MS300 Marine Sealant – Underwater Cure, 4x Stronger Than Silicone, 300ml","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eMyPond MS300 is a versatile, fish safe MS polymer sealant designed for ponds, fountains, and a range of water features. It creates durable, flexible seals on a variety of materials while performing underwater. The formulation minimizes odor and avoids formaldehyde, supporting long‑lasting repairs without harsh toxins.\u003c\/p\u003e\n\u003cp\u003eBuilt for real‑world aquatic projects, MS300 tolerates movement and weather while remaining reliable across substrates commonly found around water features. It forms a strong bond with concrete, stone, wood, glass, metal, rubber, plastic, and fiberglass, helping you tackle leaks and liner seams with confidence.\u003c\/p\u003e\n\u003ch3\u003eWhy MS300 stands out\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e4x stronger than traditional silicone sealants, which can lead to fewer touch‑ups over time.\u003c\/li\u003e\n  \u003cli\u003eUnderwater cure in about 24 hours, letting you repair without draining water features.\u003c\/li\u003e\n  \u003cli\u003eFish‑safe formula supports healthy aquatic life while sealing liners and windows.\u003c\/li\u003e\n  \u003cli\u003eNo shrinkage after curing and a flexible bond that adapts to substrate movement.\u003c\/li\u003e\n  \u003cli\u003eNo priming required on clean, grease‑free surfaces; concrete priming is suggested for the best bond on concrete.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSurface compatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eConcrete and stone\u003c\/li\u003e\n  \u003cli\u003eWood, glass and ceramic\u003c\/li\u003e\n  \u003cli\u003eMetal, rubber, plastic and fiberglass\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTips for best results\u003c\/h3\u003e\n\u003cp\u003eApply a single generous bead rather than multiple small beads for a stronger seal. Aim for at least 2 mm of thickness to ensure coverage. Start with clean and dry surfaces, removing grease, dust, and debris before application. Allow the product to cure with support if sealing large beads underwater. Heavier joints may require longer curing time in the center than at the surface.\u003c\/p\u003e\n\u003cp\u003eKeep away from fire and out of reach of children. Use in a well‑ventilated area and follow safety guidelines for uncured adhesive contact with skin or eyes. The product skins in 24 hours but can take longer to cure fully in the center of large beads. This flexible finish helps water features adapt to temperature changes and seasonal movement without cracking.\u003c\/p\u003e\n\u003ch3\u003eTypical use cases\u003c\/h3\u003e\n\u003cp\u003eMS300 works well for pond leaks, window installations on liners, bottom drain sealing, and repairs in koi ponds or fountains. It can also serve as a marine grade sealant for glass or metal components and can be used around gutters where water exposure is frequent.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What surfaces does MyPond MS300 bond to?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It adheres to concrete, stone, wood, glass, metal, rubber, plastic, and fiberglass for underwater repairs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How long does it take to cure?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Skin forms in about 24 hours; full center cure may take longer, especially in large beads; cures underwater with support.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"MyPond","offers":[{"title":"Default Title","offer_id":45741692158138,"sku":"B0C2VBJ2BL","price":71.32,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/3536\/8890\/files\/mypond-ms300-bottle-front.jpg?v=1774829943","url":"https:\/\/gardencanada.ca\/products\/mypond-ms300-marine-sealant-underwater-cure-4x-stronger-than-silicone-300ml","provider":"Garden Canada","version":"1.0","type":"link"}