Sikaflex 1a 20 oz Sausage, Aluminum Gray, 1 Unit, One Component, Elastomeric, Non Sag, Polyurethane Concrete and Masonry Joint Sealant for Vertical and Horizontal Joints

This product worked great as a gap sealer between the concrete slab and bottom plate of our wood framed workshop. It is very rubbery when cured so it won't crack or shrink, very similar to silicone but with a rubbery feel to it. I have also used it as a sealer between the window flange and framing of a window opening in new construction applications. I think you can seal gaps up to 3/4" but that's gonn use a lot of material for a gap that large. I reccomend using appropriate size backer rod, then top coat with this product. -MLC Remodeling

works fine have used it before

I am remaking Spinal Tap, so this was handy...

After cleaning the expansion joint between the garage slab and driveway, I followed directions to ensure uniform depth with foam. Application was easy and required some smoothing, it turned out great. I highly recommend this product.

This is an expired product. It’s pretty sad I have to wait to receive something that shouldn’t be used. Today is March 1 and it expired three weeks ago.

Put in a channel drain and sealed to side walk with this product. Adheres nicely and easy to work with and dries fairly quickly. Good concrete joint sealer.

Flows and fills in better than most other sealants. Soft and flexible, tubes are large and cover bigger cracks/gaps.

I used 4 of these to seal up an old trailer. It worked perfectly and was fully cured in about 5 days. Simply put an amazing product.

I use SIKA products, particularly the Flex products, on countless build and repair products. Great sealant and adhesive combined. Timber builds. Foundation connections. Wall penetrations. Window installations. Sheathing joint seals. Custom floor board and ceiling planking attachments. Repairs. Super versatile. Use across a range of temperature applications. Have used on projects on three coasts and in three countries. Really quality stuff. Get maxiumum product usage out of the 20oz sausage tubes. Able to seal, store and reuse multiple times. After using literally hundreds of these tubes, I keep reaching for more. The only blip has been occasional inventory SKU mess-ups where a Black or White tube may be inserted into the mix of Limestone color, or visa versa. Always resolved quickly through Amazon.

This is a much more durable caulk than latex or silicone. It’s not water-cleanup so you’ll want the have a solvent ready to wipe up any messes.

Happy with the results.