ProPOXY MoistureBLOK (MB) RESIN

TYPICAL USES

•  Moisture Mitigation System applied under all ProREZ seamless flooring materials
•  Concrete slabs- on or below-grade without vapor barrier or retarder
•  “Green Concrete” slabs 7-days or older
•  Industrial, commercial, institutional, and residential applications

OPTIONAL

ProThickener (aerosil thickener)ProColor Universal Colorants 

(on-site pigmenting)ProMetallic (iridescent colorant)MicrobeBLOK (anti-microbial)ProPoxy Accelerator (on-site accelerator)

PACKAGING

•  5 gallon white pail - Resin
•  5 gallon black pail - Hardener
•  1 gallon white pail - Resinu 1 gallon black pail - Hardener
•  50 gallon drum

STORAGE

Materials should be stored indoors between  50°F (10°C) and 90°F (32°C).

SHELF LIFE

One (1) year from date of manufacture.

LIMITATIONS

This product is best suited for application  in temperatures between 50ºF and 90ºF. It  is designed as a moisture mitigation primer  system for indoor use. It should only be  applied to properly prepared, sound and  stable concrete. 

PRODUCTS GUIDE

1. ProPoxy MB Resin is a specially engineered  hybrid epoxy used to mitigate moisture vapor  when combined with MB Hardener.2. ProPoxy MB S-Hardener is a lower viscosity, 

moderately fast curing hardener for improved  wetting and working tim e when combined  with with ProPoxy MB Resin. 3. ProPoxy MB F-Hardener is a fast  

curing hardener when combined with ProPoxy MB Resin.

COVERAGE RATE

A gallon of ProPoxy MB will cover in the 

A nominal thickness of 16 mils is required for  mitigating moisture vapor emissions greater     than 16lbs/1000 sq. ft./24 hours or   92% internal RH.

TYPICAL SLAB TESTING PRIOR  

TO APPLICATION

It is recommended that the owner of the facility  or a certified ProREZ applicator test the slab(s)  with unknown history for contaminants (e.g.  hydrocarbons, other organic compounds,  water soluble ions, ASR, sulfurous compounds,  etc.) to determine suitability for ProPoxy MB. ProREZ strongly recommends “Anhydrous 

Calcium Chloride” per ASTM F 1869-11to  determine the MVER (moisture vapor emission  rate) in lbs/24hrs•\1000 sq. ft or “In-Situ” per  ASTM F 2170-11 to determine the internal  relative humidity for slabs to be treated. Low  permeability flooring finishes like seamless  polymer coatings require MVER to be below  3lbs/24hrs/1,000s.f. or 75% internal relative  humidity (RH). Internal RH is the test method  preferred by most floor covering and coating  manufacturers. MVER fluctuates within slab  areas, and can have significant seasonal  variations. The testing must be carried out  before application of the ProPoxy MB to obtain  the manufacturer’s warranty. Contact ProREZ  for additional details and guidelines concerning  pre-installation concrete testing.

EXAMINING CONCRETE SUBSTRATES

ProREZ recommends taking core samples of  older, existing concrete slabs, especially when  the building’s history is unknown for analysis.  The cores should be analyzed by a qualified  laboratory for various compounds that may  cause floor failures such as soluble salts, ASR  (Alkali Silica Reaction), unreacted water soluble  silicates, organic substances etc. Water soluble  silicates are found in some curing compounds,  floor hardeners, and some manufacturers’ vapor  reduction products. 

SURFACE PREPARATION

Concrete substrate must be clean and sound,  with a properly abraded surface. Do not apply  to surfaces that have been previously treated  with any kind of penetrating sealer. Remove  existing floor coverings, coatings, adhesives,  curing compounds, efflorescence, dust, grease,  laitance, etc. down to bare concrete with steel  shot blasting, scarifying or aggressive diamond  grinding to ensure the concrete surface has  been properly prepared. The recommended  surface profile using ICRI baseline configurations  is between CSP4 -5. Once the prep work has  been completed, the concrete  surfaces must  be vacuumed, be free of all dust, dirt and debris  prior to the application of ProPoxy MB.

DESCRIPTION

ProPoxy MB is a MoistureBLOK system. It is  a clear, two component, 100% solids epoxy  hybrid for on or below grade concrete slabs.  It has been specially designed for faster cure  and maximum moisture vapor protection  while reducing the risk of outgassing & “fish  eyes” typically associated with porous &  contaminated concrete. The ProPoxy MB  primer system can be used under all ProREZ  seamless flooring materials.ProPoxy MB can be applied to concrete 

slabs with relative humidity as high as 99%  RH and provides protection from sustained  exposure to pH 14. ProPoxy MB is engineered  to reduce moisture vapor emission levels up  to 25lbs/1,000s.f./24hrs to 3lbs/1,000s.f./24hrs  or less, or 99% RH to ≤75%. ProPoxy MB is  an excellent and extremely effective, long- term moisture blocker, with good surface  contaminant resistance for both resinous  and resilient flooring systems. Furthermore, ProPoxy MB is compliant with all states and 

federal VOC regulations. Its VOC content of <5  g/L allows installation in sensitive areas such  as hospitals, schools, retail stores, and other  occupied spaces. 

FEATURES & BENEFITS

•  Single Coat Application
•  Minimal downtime- 4 hour Tack-Free Cure
•  Built-In Adhesion Promoter
•  Excellent Inter-Coat Adhesion
•  Low Temperature Curable (45°F)
•  Zero VOCs
•  Green Concrete Primer (min. 7 days old)
•  Moisture tolerant system reducing moisture vapor emission levels up to 25 lbs/1000 sq. ft./24 hours to 3 lbs/1000 sq. ft./24 hours or less (or 99% RH to ≤75%)

COLORS

See “Color Guide

ProREZ Coatings, LLC

P.O. Box 153, Cromwell, CT  06416-0153 877.511.3456         www.prorezcoatings.com

Warranties: Seller warrants that its goods, as described on the face hereof, are free from any defects in material or workmanship. Seller makes no other  warranty, express or implied, and all implied warranties of merchantability and fitness for a particular purpose are hereby disclaimed. Seller shall not be  liable for prospective profits or special indirect or consequential damages. Seller’s sole liability and buyer’s exclusive remedy for breach of any warranty  as expressly limited, at seller’s option, to replacement at the original F.O.B. point or refund of purchase price. Seller shall not be responsible for any claim  resulting from failure to utilize product in the manner in which it was intended and in accordance with instruction provided for use of product. Any  claim for breach of warranty shall be deemed waived unless buyer shall give seller written notice of such claim within sixty (60) days after delivery and  shall allow seller reasonable opportunity to investigate claim and inspect product.

ProPOXY MB

MIXING INSTRUCTIONS

Application Equipment:

•  Personal Protective Equipment (PPE) & clothing per SDS (Safety Data Sheet)
•  Jiffy® Mixer Blade (ES Model)
•  Clean Mixing Container
•  Low Speed /High Torque Power Drill
•  Shed-Resistant Roller Cover- 3/8" Nap
•  Application SqueegeeMix ratio for ProPoxy MB is 2 parts Resin to 1 part Hardener by volume. 8-16 oz. of ProColor Universal Colorant is recommended per gallon of material. (See product label.) When field pigmenting, it should be added and mixed in homogenously to the resin prior to adding the hardener.  When combining, be sure to add the hardener into the clean mixing container first. Then add the resin (clear or pigmented) scraping out the container. Always pour into the center of the mixing container.  Mix the components thoroughly for 1-2 minutes with a Jiffler ES style mix blade. Mix only enough material at one time that can be applied without exceeding the pot life.

SPECIAL NOTES

Concrete surface voids may arise due to  aggressive surface preparation and relative quality of concrete. The ProPoxy MB when 

applied may flow into these voids. As the  material flows into these voids, the air is  displaced resulting in “outgassing.” If there  are excessive surface voids, pin holes, or  bubbles encountered, STOP, and contact an ProREZ representative before proceeding. Keep the ProPoxy MB clean and free of dust, 

dirt, and debris prior to any floor coating or  covering systems. Sanding is not required if  applying within the recoat window. If installing coatings over ProPoxy MB such as epoxy or 

polyurethane, the recoat window is between 48-72 hours. If the ProPoxy MB system is to 

remain uncovered for an extended period  of time, contact an ProREZ representative  prior to installing subsequent floor coating or  covering systems.  

JOINT GUIDELINES

Static, nonmoving joints, cracks and voids can be treated by using ProPoxy MB with the ProThickener aerosil additive. Nonmoving 

joints and cracks can be reinforced using  FibaTape™ 6" fiberglass tape. “Hairline” cracks may be directly flooded with ProPoxy MB as 

applied during installation. Wider/deeper voids  and cracks need to be treated after surface  preparation has been completed. Clean cracks  using a wire brush then vacuum to remove  debris. Cracks may be cut 1/8" wide x 1/8 "  deep using a thin, diamond-rimmed abrasive 

blade on an angle grinder. Brush and vacuum  to remove dust and debris. Spackle the deep  voids and cracks with ProPoxy MB thickened  with ProThickener aerosil additive at a mixing  ratio that results in a spreadable consistency  using a flat spackle knife.Larger voids, spalls, and wider cracks must be 

treated first prior to shot-blasting or diamond  grinding. Remove all debris, loose particles,  dust, contaminants etc. Fill the voids using  suitable moisture tolerant repair mortar.Allow sufficient curing time of the repair 

mortar before mechanically shotblasting   to CSP 4-5.Dynamic, moving joints and cracks must be 

honored through the entire flooring system  and filled with an elastomeric material that  is suited for the general conditions, the use  of the facility, and the anticipated type and  amount of movement.If there is any doubt as to the integrity of any 

existing backing materials, it is always best to  remove, clean and re-fill the joint.Clean the joint completely and remove all 

remnants of the old elastomeric material from  the side walls. Joints or cracks in concrete slabs  that have dirt, residue from previous coating,  or other contaminants should be cut 1/4” wide  x 1/2” deep to remove the contaminants. Clean  the joint or crack thoroughly until it is free of  dust and debris. Coat the side walls of the joint with ProPoxy MB in the area where the joint 

sealant is intended to bond to the side of the  joint. Do not flood the joint. The elastic joint  must be installed so that the joint runs through 

the entire flooring system, including all final  floor coatings or coverings. Then the joint is  fitted with a backer rod and a suitable elastic  joint sealant is installed.

TECHNICAL SUPPORT

For any application questions, please call ProREZ technical support at 877.511.3456.

DISPOSAL

Dispose in accordance with federal, state and  local regulations.

SDS

PLEASE SEE SAFETY DATA SHEET (SDS) FOR  SAFETY AND PRECAUTIONS. USE PRODUCT