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.

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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

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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)

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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.

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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.

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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.

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

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

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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.

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