{"product_id":"nomaco-hbr-closed-cell-backer-rod-2-3-x-6-black-foam","title":"Nomaco HBR Closed Cell Backer Rod 2\" \u0026 3\" x 6' – Black Foam","description":"\u003ch1\u003eNomaco HBR Closed Cell Backer Rod 2\" \u0026amp; 3\" x 6' – Black Foam\u003c\/h1\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eNomaco HBR is a closed cell backer rod for filling concrete expansion and contraction joints before sealant application. This page lists two sizes: 2\" x 6' and 3\" x 6' black rods, each sold as one piece. Nomaco engineered foam materials serve commercial, residential, municipal, civil and industrial projects.\u003c\/strong\u003e\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eKey Features:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eClosed Cell Foam:\u003c\/strong\u003e Closed cell construction backer rod supports joint sealant application.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJoint Filler:\u003c\/strong\u003e Used as a filler for concrete expansion and contraction joints almost anywhere concrete is used.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile Applications:\u003c\/strong\u003e Designed for commercial, residential, municipal, civil and industrial projects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo Diameters:\u003c\/strong\u003e Available in 2\" and 3\" diameters, each 6 ft. long.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlack Color:\u003c\/strong\u003e Black foam blends into concrete joints during installation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch2\u003eSpecifications Table:\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eDetails\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNomaco\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSell unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 piece, 6 ft. length (2 in. or 3 in. diameter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct line\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNomaco engineered construction foam materials\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAvailable colors\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBlack (3\" item listed as Black; color not stated for the 2\" item)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAvailable sizes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2\" x 6' and 3\" x 6'\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eClosed cell foam\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2 in. or 3 in. diameter x 6 ft. length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIntended use\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFiller for concrete expansion and contraction joints; backing for joint sealants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAssembly\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePress into clean joint before applying sealant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003chr\u003e\u003ch2\u003eCoverage \u0026amp; How Much You Need:\u003c\/h2\u003e\u003cp\u003eEach 6 ft. rod fills 6 linear feet of joint. Measure total joint footage and order enough rods to cover it, choosing a rod diameter roughly 25% larger than the joint width so it compresses and stays in place.\u003c\/p\u003e\u003ch2\u003eFit and Compatibility:\u003c\/h2\u003e\u003cp\u003eWorks under compatible joint sealants in concrete expansion and contraction joints. Select rod diameter to suit joint width; the 2\" rod suits wider joints than typical 3\/8\"–1\" applications, and the 3\" rod fits very large joints.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eFrequently Asked Questions (FAQ):\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eQ: What is included?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e One 6 ft. backer rod per item ordered, in either 2\" or 3\" diameter depending on the variant.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: What does backer rod do?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e It fills concrete expansion and contraction joints and provides backing so sealant is applied at the proper depth and shape.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: Which diameter should I choose?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Common practice is to pick a rod about 25% wider than the joint so it friction-fits; use 2\" for large joints and 3\" for very large joints.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: What projects is it for?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Nomaco engineered foam materials are designed for commercial, residential, municipal, civil and industrial projects.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: Is it open cell or closed cell?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This is a closed cell backer rod (HBR).\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: How is it installed?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Press the rod into the cleaned joint to the required depth, then apply sealant over it.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eExpert Verdict — Reviewed by the SuperArbor Pro Desk\u003c\/h2\u003e\u003cp\u003eBacker rod controls sealant depth so the joint can flex without the sealant bonding to the bottom—a three-point bonding failure you avoid with proper backing. Closed cell rod suits horizontal concrete joints; size the rod about 25% oversized for a friction fit and do not stretch it during installation. For very wide slab joints, the 3\" diameter offered here is a practical choice.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eReview the sealant manufacturer's instructions for joint preparation and compatibility before installing backer rod and sealant.\u003c\/em\u003e\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eOrder Nomaco HBR Closed Cell Backer Rod in 2\" or 3\" and back your concrete joint sealant the right way.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Nomaco","offers":[{"title":"Black \/ 3\" x 6'","offer_id":53524024656239,"sku":"NOM3379130001","price":12.55,"currency_code":"USD","in_stock":true},{"title":"Standard \/ 2\" x 6'","offer_id":53524024689007,"sku":"NOM3379120001","price":4.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0830\/3499\/7051\/files\/NOM3379130001_0.jpg?v=1790270559","url":"https:\/\/superarbor.io\/products\/nomaco-hbr-closed-cell-backer-rod-2-3-x-6-black-foam","provider":"Super Arbor","version":"1.0","type":"link"}