how many feet come in a 3 pk?

Both INDIVIDUAL packs - the 3/8" and the 1/2"- are 20 feet long.

no 1/4" one? either 20 or 50ft?

Not in this brand, but Amazon offers 1/4-inch backer rod in various lengths, from 10 feet to 100 feet, from other brands. Just search on "Backer Rod 1/4 Inch".

can the backer rod be sliced for smaller openings?

I have not done that, but it cuts easily with a sharp knife or scissors, so you should be able to slice it to fit whatever opening you have. It's good stuff!

Can his be used for exterior windows before caulking?

I used it to push into larger cracks in my driveway before applying concrete filler, and it worked great. I'm thinking that it should work well for filling in spaces around your windows prior to caulking.

M D Building Products Versatile Gray Foam Backer Rod Essential

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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3860 som

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Sold byAmazon KyrgyzstanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛡️ Seal smart, save more — the ultimate caulk saver for pros and DIYers alike!

MULTI USE HOME ESSENTIAL - Ideal for concrete, expansion joints, insulation, and draft-proofing
BUILT TO BRAVE THE ELEMENTS - Durable, weatherproof material ensures year-round protection
PRECISION FIT FOR EVERY GAP - Snug 3/8 inch foam diameter seals medium cracks flawlessly
CUT TO PERFECTION CONVENIENCE - Trim with scissors for a custom fit every time
EFFORTLESS INSTALLATION INSTANT RESULTS - Push-in design saves time and avoids messy adhesives

The M-D Building Products Versatile Gray Foam Backer Rod is a 3/8 inch diameter, 20-foot long foam rod designed to fill medium gaps in concrete, expansion joints, and cracks. Made from durable, weather-resistant rubber foam, it provides a reliable base for caulking, enhances insulation, and prevents drafts both indoors and outdoors. Easy to install and trim, this waterproof backer rod is a must-have for professional-grade sealing and energy efficiency.

Specifications

ASIN	B000BQS90G
Best Sellers Rank	#99,520 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #6 in Rope Caulk #267 in Industrial Sealants #21,396 in Hardware
Brand	M-D Building Products
Brand Name	M-D Building Products
Color	Gray
Customer Reviews	4.6 out of 5 stars 1,642 Reviews
Global Trade Identification Number	00043374714647
Included Components	MD Building - 71464 - 2pk
Item Form	Foam
Item Type Name	MD Building - 71464 - 2pk
Item Weight	0.6 Ounces
Manufacturer	M-D Building Products
Material Type	Rubber
Model	71464
Number of Items	1
Part Number	71464
Surface Recommendation	surface_recommendation
UPC	043374714647
Unit Count	1.0 Count
Warranty Description	All M-D products are warranted to be free from defects in material and workmanship if installed and used in strict accordance with our installation instructions.
Water Resistance Level	Waterproof

Reviews

M**N

8.02.2026

A**E

6.01.2026

J**J

23.02.2026

R**S

25.11.2023

U**T

8.04.2026

B**I

9.01.2026

B**E

22.07.2024

D**I

7.01.2026

B**S

30.09.2023

P**S

13.06.2018

M**Y

24.10.2025

A**W

12.10.2025

D**N

8.11.2024

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Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

3860 som

Duties & taxes included

In stock

Sold byAmazon KyrgyzstanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Kyrgyzstan.

Secure transaction

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M-D Building Products - Versatile Gray Foam Backer Rod - Essential Caulk Saver for Sealing Concrete Gaps, Expansion Joints, and Crack Filling, 3/8 by 20 Feet (71464)

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Description

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Common Questions