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It’s easy, it’s fast, and it works.

Quickly repair crumbling mortar or cracked stucco with a lasting, weatherproof seal. Mor-Flexx has a realistic textured matte finish that stretches & stays flexible, making it the most convenient way to repair all your textured substrates in one high-performance caulk.

Find Mor-Flexx® Near You
Learn more about Mor-Flexx® features and benefits Video 0:48
MSRP $8.79

No mixing needed.

Replacement and repeated repairs re-crack, not to mention they're costly and time-consuming. That's why you need Mor-Flexx. It's textured, so while it may look like mortar and stucco, it stretches like rubber, staying elastic year after year.

Textured matte finish 

A better match with realistic mortar finish for all EIFS, mortar, stucco, concrete, & stone install & repair needs. The textured caulk that makes chimney tuckpointing a breeze

Easily applies & tools

Professional water-based formula for easy application, easy water clean-up & no stinky, stringy mess. Even works on damp surfaces.

Superior adhesion & elasticity 

Remains flexible like rubber allowing for a permanent, tight seal. No callbacks or reword necessary. Stretches up to 3 inches wide with no slumping.

Paintable without the paint gloss

Compatible with latex paint and most oil-based paints, sealers, and stains and won’t cause paint gloss, making it easy to use on any color.

Blends like a dream

The textured formula of Mor-Flexx is so easy to apply, smooth out, and clean up, even a novice can execute a seamlessly blended, beautiful repair on crumbly mortar, or cracked stucco.

A permanent solution

It’s the best elastic repair for cracked and brittle mortar, stucco, and grout. No need to mix up patching materials. Save time with a quick simple solution that looks good, and lasts, too.

Mor-Flexx Colors

Great for interior and exterior use

Mor-Flexx comes in Gray, Beige, Charcoal, Ironstone, and White, and is available in 10.5oz plastic cartridges.  A 10.5oz cartridge will yield approximately 26 lineal feet with a 1/4 inch (6mm) bead.


Find out What Mor-Flexx® Can Do

Technical Info and Safety Data Sheets

Mor-Flexx will handle most any movement your substrate can experience all without crumbling. It’s perfect for many interior and exterior applications, including:

  • Brick, block, and mortar repair
  • Chimney tuckpointing
  • Stucco repair
  • Windows
  • Siding
  • Faux stone installation

Adheres to a variety of building materials and other surfaces, including:

Chimney tuckpointing

Where not to use

You shouldn’t use Mor-Flexx®:

In areas of constant water submersion or frequent, prolonged puddling. (Think ship hulls and swamps.)

In areas with high foot or vehicle traffic* such as driveways, sidewalks, or decks.

On concrete that’s less than 6 months old. It’s so immature, it’ll just make wise cracks.

Where hydrostatic resistance is wanted, like the Hoover Dam.

*Does not include hoverboards or flying vehicle traffic

We’re here to help see your project through to the end

Not sure which sealant, caulk, or other product is right for your job? Looking for the nearest location to buy products for your next home project? Don’t know exactly how to tackle your repair? We’re here to help.

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