PRODUCT INFORMATION

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PRODUCT DESRIPTION

PRIMARY USES

L&L 300 RCM Mastic is a high-solids, waterborne, elastomeric coating. Its high permeability coupled with optimum brightness greatly reduces the occurrence of polyurethane foam blisters (delamination) which frequently develop when existing polyurethane foam has been compromised by water intrusion, then re-coated. L&L 300 RCM Mastic is engineered to allow entrapped moisture vapor to escape through its membrane. Its bright white reflective surface reduces surface temperature, and in turn, minimizes vapor drive. While L&L 300 RCM Mastic has many other uses, it was designed specifically for re-coating existing polyurethane roof decks.

4 Re-coating compromised polyurethane foam roof decks.

4 Polyurethane foam weather barrier finish coat.

4 Bright White finish on epoxy primed steel storage tanks.

4 Architectural restoration.

4 Above grade masonry damp proofing.

4 Dust control: Seals joints and seams on conveyors, dust collectors, elevators, and other material handling equipment.

COLORS

FEATURES

4 Bright White *

4 Non-metallic pastel colors.

* Bright white is recommended for foam and masonry

 

SPECIALTY GRADES

L&L 300 RCM ZnO Mastic

4 Maximum mildew/algae resistance

L&L 300 RCM Ceramic

4 Contains 3M® Ceramic Spheres

L&L 300 RCM Mastic Low Temperature

4 Temperature exposures to -20F.

4 VOC compliant.

4 Fast Drying.

4 Resistant to vapor, splash, and spillage of many chemicals and acids.

4 Performs as a resilient, tightly adhering protective film when applied to: primed ferrous and non-ferrous metal, galvanized steel, masonry, fiberglass, transite and most construction, insulation and roofing materials, protecting them from the ravages of time, weather, and hostile environments.

4 Single component.

4 Intermediate and finish coat in the L & L moisture and air-flow reinforced systems.

4 Contains no lead, mercury, or asbestos

TYPICAL PROPERTIES AND PERFORMANCE

Property

Test Method

Value

Density

ASTM D1475

11.75 lb. per gallon

Tensile Strength

ASTM D2370

218 lb. per inch

Tensile Elongation at break @ 75

ASTM D2370

362%

Permeability

ASTM D1653

61.02 Perms

Total Solids

68.56%

VISCOSITY

L&L 300 Mastic is manufactured in three thixotropic viscosities:

4 "Light" brush, roller & airless spray grade

4 "Standard" brush, roller & airless spray grade

4 Trowel and palm grade

When choosing viscosity range, consider factors such as surface profile and porosity, required film thickness and application methods.

RECOMMENDED SUBSTRATE CONDITIONS

Repair substrate and replace blistered polyurethane foam in accordance with the society of Plastics Industry (Spray Polyurethane Foam Division) recommended design consideration and guide specification. All surfaces to be coated must be clean, dry and free of dirt, oil, grease, mildew, rust, wax, chalking or peeling coatings and any foreign matter, which could prevent proper adhesion. Never apply to surfaces which pond water. We recommend L&L POWER PREP + as a pre-wash cleaner. It is fast and efficient and leaves no residue.

APPLICATION EQUIPMENT

METHODS OF APPLICATION: L&L 300 RCM Mastic can be brushed , rolled or sprayed. Rollers: 1" to 1" nap. Airless spray equipment: Graco Bulldog 33:1 Pump # 237-435 fed by a Graco Monark 5:1 Transfer Pump # 224-350. Fluid hose requirements: 3/8" ID with " ID whip-end section. Graco Gold or Silver Airless spray gun equipped with a .015" - .029" Graco Reverse-a-Clean tip. Spray equipment with specifications equal to or exceeding those listed above are available and may be used as well.

 

APPLICATION

Contact your L&L Coatings Representative for specific application information and technical assistance.

HANDLING AND STORAGE

L&L 300 RCM Mastic requires no mixing or thinning. Cleans up with soap and water when wet. Xylene required to remove dried material. Protect from freezing. Never apply at temperatures below +40F. or when freezing temperatures are likely to occur before mastic cures. Discontinue application three hours before sunset. Do not apply when rain is likely to occur. Shelf-life: 19 months when stored indoors at +40F. to +100F. Keep container sealed when not in use. Read and understand Material Safety Data Sheets before using product.

PACKING / SHIPPING

UNIT

SHIPPING WEIGHT (APPROX.)

One gallon pail, per carton

Four one gallon pails, per carton

Five gallon pail

Fifty-five gallon drum

13.10 lbs.

51.45 lbs.

61.55 lbs.

688.50 lbs.

This statement and information provided concerning the materials shown are based on laboratory and field-testing and is believed to be reliable and true. The buyer and user by accapting the products described herein, agrees to be responsible for thoroughly testing its end use suitability before committing to its application. The manufacturer's extent of liability in connection with the sale of this material is limited to the purchase price.

 

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