Why do I need to test concrete for moisture before applying an epoxy coating?

Moisture vapor emitting from concrete slabs can cause epoxy, polyaspartic, and decorative floor coatings to bubble, blister, and delaminate within months of application. Testing with the ASTM F1869 calcium chloride method measures the moisture vapor emission rate before coating, allowing you to treat the slab or choose a moisture-tolerant product before the coating fails.

What is the ASTM F1869 calcium chloride test?

ASTM F1869 is the industry-standard anhydrous calcium chloride test for measuring moisture vapor emission rates in concrete floor slabs. A sealed calcium chloride dish is placed on the prepared slab for 60 to 72 hours. The weight gain of the calcium chloride indicates the emission rate in pounds per 1,000 square feet per 24 hours. Most coating manufacturers specify a maximum MVER for warranty compliance.

Can EmeSealCrete reduce radon gas in a basement?

Yes. EmeSealCrete penetrates into the concrete matrix and reduces the transmission of both moisture vapor and radon gas through basement floor slabs and walls. It is not a substitute for active radon mitigation systems where radon levels are above Health Canada or EPA action levels, but it reduces passive radon transmission through untreated concrete surfaces.

When should I apply EmeSealCrete before a floor coating?

Apply EmeSealCrete when the calcium chloride moisture vapor test shows emission rates exceeding the coating manufacturer's maximum acceptable level, typically 3 to 5 pounds per 1,000 sq ft per 24 hours for most epoxy and polyaspartic products. Allow EmeSealCrete to fully cure before applying the topcoat per the product instructions.

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Concrete Sealers / Radon

Concrete Sealers, Vapor Barriers & Radon Mitigation

Reduce moisture vapor transmission and radon gas through concrete basement floors and walls — before applying coatings or as a standalone mitigation treatment. Test first, then seal.

Moisture Vapor Emission Test — ASTM F1869 Calcium Chloride Method

Concrete floor slabs emit moisture vapor that can cause epoxy, polyaspartic, and decorative coatings to delaminate and fail within months of application. The anhydrous calcium chloride test measures the moisture vapor emission rate (MVER) of the slab before any coating is applied.

Industry-standard ASTM F1869 test method.
Includes pH test — identifies high-alkalinity concrete that can also cause coating failure.
Required by most epoxy and polyaspartic coating manufacturers before warranty is valid.
Test before any epoxy, polyurea, polyaspartic, or decorative floor coating application.

EmeSealCrete — Moisture & Radon Sealer for Concrete

EmeSealCrete is a penetrating concrete sealer that seals out moisture vapor and radon gas transmission through concrete floors and walls. Concentrate formula makes 4× volume.

Blocks moisture vapor emission to protect coatings from delamination.
Reduces radon gas transmission through basement floor slabs and walls.
Penetrates into the concrete matrix — not a surface film coating.
Apply before epoxy, polyaspartic, or any decorative floor coating where moisture vapor test results exceed acceptable limits.

Category Items

Moisture Vapor Emission Calcium Chloride Test Kit for Concrete

Concrete floor slab Moisture Emission Test Kit. Anhydrous Calcium Chloride vapor test. Prevent concrete coating failures in advance and treat concrete before coating. This is an Industry standard test also includes a ph test.

NX2452

$15.95 USD ($21.26 CAD)

PreOrder

EmeSealCrete Moisture - Radon sealer

EmeSealCrete seals out moisture and radon gas transmission through concrete. Concentrate makes 4 x volume.

NX2458

Regular Price: $91.95 USD ($122.57 CAD)
Sale Price: $65.00 USD ($86.65 CAD)

InStock