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.
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.
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
Professional water-based formula for easy application, easy water clean-up & no stinky, stringy mess. Even works on damp surfaces.
Remains flexible like rubber allowing for a permanent, tight seal. No callbacks or reword necessary. Stretches up to 3 inches wide with no slumping.
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.
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.
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 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.
It’s now more than two years since filling the large cracks and this stuff is holding up great – still looks just like concrete, adhering extremely well without a single area where edges have pulled loose, and clearly very tough. No cracking or any other signs of distress. This stuff is great. Highly recommended.
JohnG, Amazon.com review
I had a company quote me $1500 to fix all the cracks in my mortar from my house settling over the years. I found out about this product on-line and found it in a local hardware store for $8. It was a perfect match for my mortar and was easy to apply. My friends can’t even tell where the cracks were. Awesome product. I would highly recommend it.
biggunn, Amazon.com review
This is one of those top 0.1% products for me. It has literally saved me from having to replace (i.e. add a second tile layer) my old fashion type Spanish roof (a roughly 90-year-old home). I can only imagine how much money this will save me. The 3 year old application still looks totally solid in spite of being constantly exposed to intense California sunshine. It is just an amazing product and I am their customer for life.
B. Cunningham, Amazon.com review
Mor-Flexx will handle most any movement your substrate can experience all without crumbling. It’s perfect for many interior and exterior applications, including:
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
Keys to caulking success
Choose the right product: Mor-Flexx vs Slab
Splits and Tears in Your Caulk? Oh My! Learn about Adhesive Failure
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