Moisture Vapor Transmission (MVT)

• The Problem: Concrete is porous. Moisture from the ground moves upward through the slab.

• The Consequence: If an impermeable epoxy is applied over a wet slab, the pressure builds until it creates osmotic blistering or complete delamination.

• The Test: Calcium Chloride (ASTM F1869) or Relative Humidity (ASTM F2170).

2. Surface Profile & Bond Strength

• The Problem: Concrete that is too smooth (power-troweled) or too weak (low PSI) won’t “grip” the resin.

• The Consequence: The floor may look good initially but will peel up under the torque of a forklift or pallet jack.

• The Test: Pull-off Adhesion Testing (ASTM D7234) and checking the CSP (Concrete Surface Profile).

3. Substrate Contamination

• The Problem: Industrial floors often have decades of embedded oils, fats, or chemicals (common in Bristol Seafoods or older manufacturing plants).

• The Consequence: Epoxy will not bond to oil-saturated concrete, even if ground. It will fish-eye or peel.

• The Test: Concrete Core Analysis to determine the depth of contamination.

4. pH and Alkalinity

• The Problem: High alkalinity can break down the polymer bond at the interface of the concrete and the coating.

• The Consequence: A “soapy” layer forms under the epoxy, causing it to lose its bond over time.

• The Test: pH Testing (ASTM F710).

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Technical & Industry Keywords (High Authority)

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• ICRI concrete surface profile standards