Liquid Epoxy Primer - Moisture Vapor Locking Barrier System. Seal your applications with confidence and avoid moisture from your substrate.
Moisture Vapor Locking Suppression System forms a solvent-free epoxy primer which may be suitable for use on a variety of finished floor coverings such as concrete, vinyl tiles and sheeting, rubber-backed carpet, hardwood, and solvent-free epoxy topcoats. This product is excellent as a concrete sealer.
*ASTM E 96-10 and ASTM D7234 Testing conducted by CTL Group Labs, Skokie, IL
*ASTM D 7234-05 Test Results* Method for Pull-Off Adhesion Strength of Coatings on Concrete) MVSS: Epoxy System (after 62 days of water vapor exposure) Concrete Cure Time Tensile Bond Strength Failure Mode
7 days > 480 psi No failure
28 days > 480 psi No failure
A solvent-free epoxy system has been specially-designed for use in formulating moisture vapor emission coatings. A moisture vapor suppression system (MVSS) was found by a third party testing facility to provide perm ratings of <0.10 (depending on film thickness). With this low perm rating, when properly formulated and applied to well prepared concrete surfaces, such a system may be considered a Class I Vapor Diffusion Retarder and may be suitable for use under a variety of finished floor coverings such as vinyl tiles and sheeting, rubber-backed carpet, hardwood, and solvent-free epoxy primers.
Typical Properties:
System
Epoxy Resin:
Viscosity at 25°C 500 – 700cps. Density at 20 °C 1.17 g/mL
Curing Agent: 800 – 1,200 cps. 1.04 g/mL
Moisture Vapor Suppression System (MVSS)
Mixing Ratio, by Weight
100 : 50 (epoxy (A) / curing agent (B)
work time at 23 °C 25 min.
Recoat Time
8 – 24 hrs.
(temperature dependent)
Surface Preparation:
Proper substrate preparation is very important. Shot blasting is strongly recommended, however, it is the sole responsibility of the end user to
identify which methods are suitable for concrete preparation given the specific
conditions of the substrate and environment for application. It is incumbent upon the formulator and/ or contractor to apply a test patch. the formulated system on the substrate before application. The application of a test patch to each specific area of the job site is recommended to ensure that the formulation meets the application requirements and is suitable for use in that specific area. The test patch(es) should be applied and evaluated after 30 minutes prior to commencement of application of entire job.
Mixing:
By weight:
2 parts Epoxy Resin / 1 part Curing Agent
By volume:
2 parts Epoxy Resin / 1 part Curing Agent
Mix the fully-formulated epoxy and curing agent portions and blend to a homogeneous
state with appropriate mixing equipment. Avoid entraining excessive air into the blend
during high speed agitation. Thorough mixing is recommended by agitating at low
or moderate speeds for a minimum of 3 to 5 minutes. Due to its working pot life, this system should be applied immediately after thorough mixing. Do not apply to surfaces with visible moisture. A uniform coating can be applied with a squeegee and paint roller combination method, for example. Coverage rates depend on application technique, substrate porosity and required perms. (approximately 500 Square Feet ) Cure time is temperature dependent. At room temperature, re-coat can be accomplished in approximately 8 hours; lower temperatures may require up to 24 hours.