PRODUCT INFORMATION

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PRODUCT DESRIPTION

PRIMARY USES

L&L 300 Mastic is a high-build, waterborne, elastomeric barrier coating. Its unique blend of premium acrylic resins and pigments combine to form a durable, mildew-resistant film with exceptional adhesion and flexibility. L&L 300 is a breathing mastic which allows damaging substrate moisture to escape, while protecting against ultra-violet, water and air-flow intrusion.

4 Architectural restoration.

4 Urethane Foam and galvanized steel roof-deck weather and waterproofing.

4 Above grade masonry damp proofing.

FEATURES

4 Air-flow management (e.g. in nuclear power facilities and tobacco storage warehouse.)

4 VOC compliant.

4 Thermal-insulation weather barrier.

4 Fast Drying.

4 Protective coating and repairs for single-ply roofing systems.

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

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

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.

SPECIALTY GRADES

L&L 300 Mastic UL Classified: Meets Underwriters Laboratories 790 as a Class-A spray-applied foam and coating system. (Refer to UL Building Material Directory for conditions to qualify as an "A-rated system."

L&L 300 Mastic EXP: Passes ASTM E 162 "Surface flammability of materials using radiant heat energy source."

L&L 300 Mastic and 300 EXP are available in low-temperature formulas which offer increased flexibility at low temperatures

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

L&L #300 Mastic

L&L #300 Mastic UL Classified

L&L #300 Mastic EXP

Density

ASTM D1475

10.14 lbs/gal. US

10.70 lbs/gal. US

10.52 lbs/gal US

Volume Solids

ASTM D2697

53.17%

53.58%

53.45%

Tensile Elongation

ASTM D2370

972%

1,000.96%

958.72%

Water Vapor Permeability

ASTM D1653

0.6128 (Perm in.)

0.3912 (Perm in.)

0.7651 (Perm in.)

Drying Time

ASTM D1640

12.5 Mil Dry Film Thickness + 70 F. 62% Humidity

Dry-to-Touch

2 hours

1.5 hours

2 hours

Dry-Through

2.5 hours

2.5 hours

2.5 hours

Dry-to-Recoat

3 hours

3 hours

3 hours

Application Temp. Range

+ 40F. - +125F.

+ 40F. - +125F.

+ 40F. - +125F.

Service Temperature Range

+33F. - +275F.

+33F. - +275F.

+33F. - +275F.

*For temperature exposures to -20F. use L&L #300 Low Temperature Grade.

All values given are test averages. Actual value may vary (+/-) 3%.

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

All surface to be coated must be clean, dry and free of dirt, oil, grease, mildew, rust, wax, chalking or peeling coating and any foreign matter which could prevent proper adhesion. Never apply to surfaces which pond water.

APPLICATION

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

CONTEMPORARY COLORS

L&L 300 Mastic is available in 1,000 aesthetically pleasing colors. See L&L Color Fan Deck. Free custom-color matching (minimum order required).

 

APPLICATION EQUIPMENT

BRUSH: Best results will be achieved using brushes with hog or other animal bristles. Quality nylon-bristle brushes may also be used.

ROLLER: Pressure fed or hand roller with 1" to 1" nap cover.

AIRLESS SPRAY PUMP: Graco Bulldog 3:1 No. 221-061 fed by Graco Monarch 5:1 transfer pump No. 206-393

FLUID HOSE: 3/8" or " ID with " ID whip-end section

HANDLING AND STORAGE

L&L 300 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: 18 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

11.5 lbs.

45.0 lbs.

53.5 lbs.

600 lbs.

THEORETICAL SPREADING RATE CHART

BRUSH, ROLLER & AIRLESS SPRAY GRADE

Dry Film Thickness

Wet Film Thickness

Ft Per Gallon

Gallons Per 100 Ft

1 mil

1.88 mil

853

.1173

5 mil

9 mil

171

.59

10 mil

19 mil

85

1.17

15 mil

28 mil

57

1.76

20 mil

38 mil

43

2.35

25 mil

47 mil

34

2.93

TROWEL & PALM GRADE

(1/32") 31 mil

58 mil

27

3.64

(1/16") 62 mil

117 mil

13

7.27

(1/8") 125 mil

235 mil

7

14.66

(1/4") 250 mil

470 mil

3.4

29.33

Note: The actual spreading rate depends on a number of factors such as: Surface profile and porosity, weather conditions, over-spray and application techniques. Use a wet film thickness gauge at regular intervals during application.

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