If the concrete slabs are 1 inch apart, will this work? I could not find any 1" being sold... Should the rope seal be the same width or smaller width?

You want to fit the gap. If the backer rod was too small I put in two rods of different sizes to fill the gap. Took some work to make it fit ok and look ok but once I put in the self leveling chalking it looked good. If there is a gap around the rods the chalk will seep down between. Not good. Could use a different chalk type but I liked the look of the self leveling after it dried.

Will this work between the tub and tile in the bathroom?

Hello. Sika Backer Rod can be used in this application if the sealant installation to follow calls for a closed-cell backer rod. Thank you for considering Sika!

Can this be used to seal between facia boards and brick wall to keep bats out?

We used this to fill big cracks in our driveway and then used concrete sealer over that. I suppose you can use it for your purpose.

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SIKA Closed-Cell Foam Backer Rod for Concrete Joints, Gray, 3/4 in x 20 ft

SIKA Closed-Cell Foam Backer Rod for Concrete Joints, Gray, 3/4 in x 20 ft

Product ID: 38638699

Details

Brand
SIKA
Item Weight
0.04 kg
Item dimensions L x W x H
240 x 0.75 x
Material
Polyurethane
Style
Joint Filler

💧Water-resistant for lasting durability

📏20 feet length for extensive coverage

🛠️3/4" diameter for perfect joint fit

₨13469

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Description

💼 Seal the deal with SIKA – where durability meets precision!

PRECISION JOINT FILLER - Perfectly sized 3/4" diameter ensures seamless crack and joint filling for professional-grade results.
UNIVERSAL COMPATIBILITY - Neutral gray color blends with most surfaces and sealants, ideal for windows, doors, and expansion joints.
SEALANT EFFICIENCY BOOSTER - Prevents 3-point adhesion and controls sealant depth, saving you time and material costs.
WATER RESISTANT DURABILITY - Closed-cell foam resists moisture, preventing damage and extending the life of your sealant.
FLEXIBLE EASY INSTALLATION - Compressible polyurethane foam inserts smoothly into gaps, making DIY or pro projects effortless.

The SIKA Closed Cell Foam Backer Rod is a 3/4" diameter, 20-foot long polyurethane foam joint filler designed for water-resistant, flexible, and durable sealing applications. Ideal for interior and exterior use, it enhances sealant performance by controlling depth and preventing adhesion issues, making it a must-have for professional-quality crack and joint repairs.

Specifications

ASIN	B013XSV3A6
Best Sellers Rank	#50,669 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #185 in Hardware Sealers
Brand Name	SIKA
Color	Grey
Compatible Material	Foam
Customer Reviews	4.6 4.6 out of 5 stars (1,052)
Global Trade Identification Number	00033886001595
Included Components	Backer Rod
Item Dimensions	240 x 0.75 x 0.75 inches
Item Form	Foam
Item Highlight	Water-resistant polyethylene, Flexible and durable, Fills cracks before sealant application, Helps control sealant depth
Item Type Name	Backer Rod
Item Weight	0.04 kg
Manufacturer	Sika
Material Type	Polyurethane
Model	108130
Number of Items	1
Number of Packs	1
Part Number	108130
Style Name	Joint Filler
Surface Recommendation	Window,Door
UPC	033886001595
Unit Count	1 Count
Water Resistance Level	Water Resistant

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TrustScore 4.5 | 7,300+ reviews

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Received my product in pristine condition. Great service overall.

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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₨13469

Duties & taxes included

In stock

Sold byAmazon Sri LankaDelivered 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 Sri Lanka.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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The delivery time was excellent, and the packaging was secure.

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