{"product_id":"7-8-kool-rod-backer-foam-for-deck-o-seal-installation-1-foot-4650875","title":"7\/8\" Kool-Rod Backer Foam For Deck-O-Seal Installation | 1 Foot | 4650875","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eKool-Rod 4650875 is a 7\/8-inch closed-cell polyethylene foam backer rod manufactured by W. R. Meadows, specifically designed for use with Deck-O-Seal and other cold-applied pool deck joint sealants. Sold per lineal foot, it installs quickly into pool coping-to-deck expansion joints and cantilever decking joints to control sealant depth, establish the correct 2:1 width-to-depth joint ratio, and prevent sealant from over-filling or sinking into the joint cavity. The 7\/8-inch diameter is well suited for slightly narrower expansion joints where a full 1-inch rod would be too wide to compress properly into place. The closed-cell foam structure is virtually non-absorbent and chemically inert to most solvents, ensuring it will not absorb moisture, trap air, or bond to the sealant applied above it — eliminating the risk of three-sided adhesion failure that compromises long-term joint performance. Fully compatible with acrylic, butyl, polyurethane, polysulfide, silicone, and most other cold-applied sealant compounds, Kool-Rod can be cut to length or compressed into place with a blunt instrument or roller with no special tools required.\u003c\/p\u003e\n\u003ch3 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eHighlights\u003c\/h3\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003e7\/8\" Diameter for Narrower Expansion Joints:\u003c\/strong\u003e The 7\/8-inch diameter is ideally sized for slightly narrower pool deck and coping expansion joints where a 1-inch rod would over-compress or resist proper seating — always select a rod diameter slightly larger than the joint width for a secure, tight fit.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eControls Sealant Depth for Proper Joint Design:\u003c\/strong\u003e Installed below the sealant layer, Kool-Rod establishes the correct 2:1 width-to-depth joint ratio recommended for Deck-O-Seal and all cold-applied pool deck sealants — ensuring a properly configured joint that performs and seals as intended over the long term.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eClosed-Cell Foam — Non-Absorbent \u0026amp; Air-Tight:\u003c\/strong\u003e The closed-cell polyethylene structure is virtually non-absorbent and prevents air or moisture from becoming trapped between the backer rod and the sealant above, eliminating a common cause of joint seal failure in pool deck and coping applications.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eNon-Bonding to Sealant — Eliminates Three-Sided Adhesion Failure:\u003c\/strong\u003e Kool-Rod will not adhere to any cold-applied sealant compound, ensuring the sealant bonds only to the two joint faces rather than the backer rod below — the correct two-sided adhesion configuration that allows the joint to flex and move without cracking or delaminating.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eCompatible with All Major Cold-Applied Sealants:\u003c\/strong\u003e Fully compatible with acrylic, butyl, polyurethane, polysulfide, silicone, and most other cold-applied sealant compounds — including the full Deck-O-Seal product line — making it a universally reliable backer rod for pool deck, coping, and expansion joint applications.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Deck-O-Seal","offers":[{"title":"Default Title","offer_id":51677652091168,"sku":"4650875","price":0.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0922\/3326\/9536\/files\/dpm.87inKool-RodBackerFoamForDeck-O-SealInstallation1Foot4650875_2.jpg?v=1779294419","url":"https:\/\/discountpoolmart.com\/products\/7-8-kool-rod-backer-foam-for-deck-o-seal-installation-1-foot-4650875","provider":"Discount Pool Mart","version":"1.0","type":"link"}