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:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
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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C. V.
Chelsea, US
★★★★★ 5
😊
Size: Medium, Color: (601) Bittersweet Pink / Stone / Stone
These are really nice except I don’t like all the colors of them so I’m getting different ones same company just different colors. I don’t like the thick ones these are perfect.. 🤩
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Reviewed in the United States on February 24, 2026
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KDK in Texas
Charlottesville, US
★★★★★ 3
Pretty Colors to Encourage Me to Walk!
Size: X-Large, Color: (601) Bittersweet Pink / Stone / Stone
Hum. Extra large does not seem extra large. I have a slender but size 10-10.5 foot. Will keep but was hoping for a looser fit. Bought to match an Under Armour walking outfit.
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Reviewed in the United States on May 16, 2026
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Patti J Fredley
New York, US
★★★★★ 5
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Size: X-Large, Color: (601) Bittersweet Pink / Stone / Stone
So cute
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Reviewed in the United States on March 6, 2026
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Janet h.
Louisville, US
★★★★★ 5
Great room divider.
Color: White, Size: 3 Panel Standard
This is a game changer. I use this when I have a lot of guests sleeping over. it divides my offer for privacy. I wouldn't be able to use a tension rod and curtain so this does the job. it divides a huge space area.
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Reviewed in the United States on January 12, 2026
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The Retired One
Chelsea, US
★★★★★ 5
Worth purchasing
Color: Black, Size: 3 Panel Standard
Works great for privacy and to block out light. Folds easily, great value for the money.
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Reviewed in the United States on November 2, 2025

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