Frost King Poly Foam Caulk Saver

Frost King C21H 3/8″ x 20′ Caulk Saver

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

Reduces the amount of caulk needed to fill large gaps. Works with virtually every type of caulk & sealant. Made of durable, resilient, moisture repellant poly foam. Just press in place, then caulk on top of it. Moisture repellent Saves expensive caulk while filling large gaps Also referred to as backer rod Additional discounts apply for this item when purchased as Bulk.