Sika 108130 Backer Rod, 3/4 in Dia, 20 ft L, Gray
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Use to partially fill deep cracks or joints before applying sealant. 3/4 in closed cell.
M-D 71464 Backer Rod, 3/8 in Dia, 20 ft
DAP 18275 Premium Sealant, White, 1 day