Your Guide To Understanding MasterSeal M 205

MasterSeal M 205 serves as a single-component, moisture-curing, low-VOC polyurethane base coat. In this post, we’ll cover everything you need to know about this product!

Applications of MasterSeal M 205

MasterSeal M 205 can be used in areas like plywood decks and balconies, parking garages, plaza decks, stadiums, commercial construction, and building and restoration projects. 

Surface Preparation Tips for MasterSeal M 205 

For use on concrete, the concrete must be structurally sound, fully cured (28 days), clean, and dry (ASTM D 4263). To remove prior coatings and any other surface pollution, all concrete surfaces—both old and new—should be shot blasted. This creates a profile that will allow for optimal adhesion. Concrete repair must be followed by abrasive shot blasting. Etching with acid is prohibited. A proper profile should be a minimum of ICRI CSP-3 (as per ICRI document 03732).

Other mechanical techniques can be utilized to create the appropriate surface profile on balconies and other pedestrian areas where shot-blasting is not feasible due to space constraints or lack of access.

For plywood applications, all plywood must be smooth-faced and APA-marked. Construction must adhere to standards, although plywood cannot be any thinner than 2332 inches (70 mm). Deck structure and plywood spacing must adhere to APA standards. Contaminants must not be present on surfaces. With dry, clean plywood, there is no need for priming.

Application Instructions for MasterSeal M 205 

Before starting the application process, all preparation must be completed. Make sure the substrate is dry, clean, sturdy, and well-profiled. Pre-striping and sealants need to be thoroughly cured. To achieve the necessary mil thicknesses, apply the base, middle, and final layers using a squeegee of the appropriate size.

Apply MasterSeal M 205 to the whole deck surface using a properly notched squeegee at a thickness of 25 wet mils (0.64 mm). Backroll it, then cover the properly prepared cracks, joints, and flashings. Expansion joints wider than 1 inch (25 mm) should not be coated. If the slope is greater than 15%, slope-grade material should be utilized.

Allow it to cure overnight (16-hour minimum). In chilly or dry weather, extend the drying period. MasterSeal M 205’s surface should have a mild tack. Consult technical service for advice if the coating has been exposed for a long time.

MasterSeal M 200 products in the 5-gallon pail have a shelf life of one year when kept in proper storage.

Safety Measures to Take When Handling MasterSeal M 205

• Use outside only or in an area with good ventilation.
• Put on protective gear, such as gloves, protective clothing, and eye and face shields.
• Avoid breathing in dust, fumes, gas, mist, vapors, or spray.
• Avoid heat, heated surfaces, sparks, open flames, and other sources of ignition. 
• Prevent static discharges by taking action.
• Do not handle it until you have read and understood all safety instructions.
• Put on respiratory protection if there isn’t enough ventilation.
• Employ electrical, ventilation, and lighting equipment that is explosion-proof.
• After handling this material, carefully wash your hands, face, and any exposed skin.
• Avoid eating, drinking, and smoking while using this product.
• Work clothes that have been contaminated shouldn’t be taken outside of the office.
• Use only spark-free tools.
• Ground and bond all containers and receiving equipment.

Why Purchase MasterSeal M 205 from Metro Sealant?

At Metro Sealant, we strive to deliver only the highest quality construction materials available. Our sealants and waterproofing materials can provide your building or structure with superior protection against water infiltration and damage from the elements. Reach out to us for more information!