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Foamlite Backer Rod 5/8 Inch Diameter (Sold Per Lineal Foot) Item: KT934625

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Olympic's Foamlite Backer Rod is polystyrene rope that is a subfiller for expansion joints and crack repair. It is for use underneath as a base for Thermolastic and Permaseal fillers.

Prevents the need to completely fill the gap as it provides a surface for the filler to harden on top of. Significantly reduces the amount of filler required to fill gaps.

Since the foam does contract, it is suggested that you purchase a diameter slightly larger than your crack to ensure a tight seal.

Deck-O-Seal 2-Part Pourable Joint Sealant 96 Oz. Item: #96JFM