Nomaco | Hard Backer Rod HBRHard Backer Rod (HBR) Not all backer rod is created equal! Nomaco HBR limits the depth of the sealant and prevents excessive sealant use. It also helps sealant assume optimum shape factor to prolong sealant service life and acts as a barrier to the flow of sealant through the joint. Common applications include, but are not limited to, expansion and contraction joints, curtain walls, construction partitions, parking decks and bridge construction. Also sometimes called nomafoam, crack filler rod, foam rod, quick rod, foam filler, insulating filler, filler rope, poly foam, chinking foam, denver foam, titan foam, tundra foam, mile high foam, expansion joint sealant backer, caulk saver, log home chinking, whatever you call it, we have it, and the largest selection in-stock ready to ship!We have ALL SIZES IN-STOCK !! Want a custom size or length? Send us a message and we can get whatever size you want!We Sell Backer Rod by the foot, by the stick, by the case, by the roll, and by the pallet, call us to order!(Custom-cut Backer Rod sold by the foot is non-returnable, non-refundable, non-cancellable; color could be gray or charcoal and is non-selectable)Additional Uses for Backer Rod; • Roofing Applications • Compression Seal Windows and Doors • Log Home Chinking • Crack Repair • Water Barrier • Safety Bumpers • Weather Stripping • Sealant Backing • Door Frame Filler • Window Seals • Boat Dock Bumpers • Air Moisture Penetration Filler