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Backer Rod Insulater (Sizes)
Backer Rod Insulater (Sizes)
Please Note: We try very hard to present accurate product images, but product changes occur constantly. All images should be considered approximations. If a particular product feature, color or characteristic is especially important, please call us to verify that information before placing your order. Thank you.
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Backer Rod Insulater (Sizes)


  • Pre-caulking material
  • Fills large gaps & openings, such as expansion joints
  • Use with all types of caulks & sealants
  • Helps repel moisture
  • Saves money by using less caulk recommended for joints and gaps over 1/2 In x 1/2 In
  • Shapes caulk bead for proper performance

Stocking Data is current as of 8/2/2025 1:15:03 PM CT

Product SKU Mfr Part # Selling Unit Qty Avail/Qty On-order Price Order
Backer Rod Insulater, 3/8 In X 20 Ft 100501 3540077 EA 12/0In Stock
1- 11
$3.790
12-71
$3.411
72+
$3.222
Backer Rod Insulator, 1/2 In X 20 Ft 100497 8105611 EA 13/0In Stock
1- 11
$3.990
12-71
$3.591
72+
$3.392
Backer Rod Insulator, 5/8 In X 20 Ft 100499 0718734 EA 12/0In Stock
1- 11
$5.290
12-71
$4.761
72+
$4.497
Backer Rod Insulator, 3/4 In X 20 Ft 100503 3519295 EA 16/0In Stock
1- 11
$8.690
12-71
$7.821
72+
$7.387