Caulk Saver Backer Rod, Frost King, 3/8 in Dia, 20 ft L, Polyfoam, Gray

Frost King C21H Caulk Saver, 3/8 in Dia, 20 ft L, Polyfoam, Gray. Poly foam caulk savers are used behind caulks to fill wide cracks and save on caulk.

• Reduces the amount of caulk you need to fill or seal large openings
• Made of durable, resilient poly foam, it works with virtually every type of caulk and sealant

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