SKU: 74768181476

MAPEI Mapelastic CI Crack-Isolation Membrane – 1 Gallon

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Description

MAPEI Mapelastic CI Crack-Isolation Membrane – 1 GallonMapelastic CI Roller Applied Crack Isolation Membrane Premixed, liquid rubber membrane designed to isolate nonstructural in plane cracks under tile and stone. Quick drying and ready for polymer modified or epoxy mortars, it meets ANSI A118. 12 to help prevent cracks up to 1 8 inch from telegraphing through finishes. Key Features: Quick Drying Protection: Dries in about 3050 minutes for faster installs ANSI A118. 12 Compliant: Isolates in plane floor

Mapelastic CI Roller-Applied Crack-Isolation Membrane

Premixed, liquid-rubber membrane designed to isolate nonstructural in-plane cracks under tile and stone. Quick-drying and ready for polymer-modified or epoxy mortars, it meets ANSI A118.12 to help prevent cracks up to 1/8 inch from telegraphing through finishes.


Key Features:

  • Quick-Drying Protection: Dries in about 30–50 minutes for faster installs
  • ANSI A118.12 Compliant: Isolates in-plane floor cracks up to 1/8 in. (3 mm)
  • Ready-to-Use Formula: Premixed, liquid-rubber membrane rolls on easily
  • Versatile Application: For residential/commercial, interior/exterior under tile and stone
  • Compatible Adhesives: Accepts most MAPEI polymer-modified or epoxy mortars

Please check the Product Data Sheet Here


Specifications Table:

Specification Details
Product name Mapelastic CI
Format Premixed, liquid-rubber membrane
Application method Roller-applied
Dry time before setting About 30–50 minutes (when fully dry)
Standards Meets ANSI A118.12
Function Prevents nonstructural, in-plane floor cracks up to 1/8 in. (3 mm) from transferring through tile/stone
Use cases Under ceramic tile or stone; residential and commercial; interior and exterior
Compatible mortars Most MAPEI polymer-modified or epoxy mortars
Package shown 1 U.S. gallon (3.79 L)

Frequently Asked Questions (FAQ):

Q: What substrates and areas can I use Mapelastic CI on?
A: It is for residential and commercial interior or exterior installations under ceramic tile and stone to isolate nonstructural in-plane cracks.


Q: How long before I can set tile over the membrane?
A: Typically 30 to 50 minutes after application, once the membrane has fully dried.


Q: What crack movement does it handle?
A: It helps prevent nonstructural, in-plane cracks up to 1/8 inch (3 mm) from transferring through tile or stone.


Q: Do I need to mix it before use?
A: No. It is a premixed, ready-to-use liquid rubber applied with a roller.


Q: Which mortars are compatible?
A: Most MAPEI polymer-modified or epoxy mortars are suitable once the membrane is dry.


Sleek Surface Security for Statement Floors

When crafting a seamless, gallery-worthy floor, Mapelastic CI becomes your quiet hero—erasing the anxiety of hairline cracks beneath luxurious stone or porcelain. Its silky, roll-on application creates a discreet shield that preserves the elegance of your finish. Use it beneath large-format tile to keep lines crisp and uninterrupted. It’s a refined essential for achieving resilient, carefree luxury underfoot.


Protect your tile or stone investment—add Mapelastic CI to your prep and install with confidence today.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 74768181476

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Ginni
Draper, US
★★★★★ 5
Love these.
Number of Items: 3, Color: White (3-pairs), Size: Medium
I have them in black and white. I use them everyday in all shoes. These are very versatile and a great quality material. They take a looong time to wear and they stay in place. Very washable and good material. They are not too thick and they do not shrink. I do air dry mine. They do not hold smells even in the summer heat.
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Reviewed in the United States on July 7, 2024
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Maria White
Fort Morgan, US
★★★★★ 5
Perfect!
Number of Items: 3, Color: Pink Quartz Assorted (3-pairs), Size: Medium
My new favorite socks! True to size, fit perfectly, and the best part is they do not slide off your foot! 10/10 recommend!
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Reviewed in the United States on July 10, 2025
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Liz Speno
San Leandro, US
★★★★★ 5
Great socks
My husband will only wear 100% cotton socks none of the spandex moisture control etc so these are hard to find in stores but he loves them and they last a while
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Reviewed in the United States on May 8, 2025
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Steven M.
New York, US
★★★★★ 5
Great feel, amazing tech, and perfect fit
Size: Large, Color: Black/Gray (6 Pairs)
I've been purchasing the white w/grey toe socks for most of my adult life. Never really understood why I'd want anything else. Saw these as an Amazon suggestion one day and figured I'd give them a shot. Oh my freaking feet have never been happier!!! I imagine that the fabrics used by UA to wick away sweat and odor are what makes these socks so comfortable, but I would be lying if I said I understood why they were so amazing. They slip on effortlessly and hug your foot throughout the day. Unlike the socks I used to purchase, these do not lose their shape after a full day of wear and exercise. They also have ample thickness to protect my feet while I'm running from any rubbing or hot spots from my shoes. I imagine this has a lot to do with the fact that they maintain their shape and do not move/slip around while wearing. I was a bit hesitant to purchase black running socks at first, but they hide right below my shoe line and are even less noticeable than my old white w/grey toe socks I used to purchase. I am not certain what "charged cotton" means, but if it means amazing feel, great features (wick away sweat; fight odor), and all for a reasonable price. I'm in. Overall, if you're looking for a nice pair of socks to wear throughout the day or while doing your workout, you would be remiss in not giving these UA socks a shot.
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Reviewed in the United States on April 1, 2017
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Skye Hart
Los Angeles, US
★★★★★ 5
Comfortable socks
Breathable and stretchy cotton socks. They are stretchy, thick and soft.
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Reviewed in the United States on February 7, 2026

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