Choosing the Right Repair Caulk: Sashco’s Slab vs. Mor-Flexx

It can be confusing to choose the right caulking product when they have a lot in common.

Say you have a concrete crack in your sidewalk, and a crack in your stucco near a window. Sashco makes two great products, both made for these textured surfaces. So which one should you use?

The answer is both.

Yes, Sashco’s Slab® and Mor-Flexx® have some similarities:

They’re both for textured surfaces.
They’re both easy to apply.
They’re both easy to clean up with water.
They’re both safe through 10 freeze-thaw cycles when unopened.
They both come with a Limited Lifetime Guarantee.
They both have really cool names (even if we do say so ourselves).

How Slab and Mor-Flexx are different

	Slab®	Mor-Flexx®
Packaging (Yep, they look different.)
Uses	Cracks in horizontal concrete, like sidewalks, driveways, garages, basements, and more.	Cracks in vertical surfaces, like stucco, and the mortar in between brick and stone
Texture	Lightly textured to match the texture of concrete	More heavily textured to blend in with mortar and stucco
Color	1 color: Gray, to match aged concrete	2 colors: Gray and Beige, to match the most common mortar and stucco colors
Formula	Specially formulated: For superb adhesion to concrete With extra elasticity, to handle the extreme movement and heaving that concrete undergoes with changes in temperatures and humidity	Specially formulated: For superb adhesion to brick, stucco, stone, mortar, and other common building materials With extra elasticity, to handle the movement that all normal homes undergo with wind and changes in weather

Can I use Slab in place of Mor-Flexx? Or Mor-Flexx in place of Slab®?

Yes, you may use Slab where you use Mor-Flexx, but it probably won’t match as well as Mor-Flexx. For better overall aesthetics, choose Mor-Flexx. (It’s also costs a bit less.)

No, you may not use Mor-Flexx where you use Slab. It’ll get beat up and damaged by foot and vehicle traffic.

The right product every time

Sashco makes it easy for you to choose the right product for each project around the house. Click here to find your project and the Sashco products that are perfect for you.