Foster® Fire Resistive C.I. Mastic™ 65-05

Identification

GBU

BAS

RTU Product Type

Solventless & High Solids Coating,

Coating

Categories

Markets → Industrial → Applications → Chemical & Industrial Manufacturing → Equipment & Parts

Technologies → Ready-to-Use Products → Product Families → Paints & Coatings → Protective Coatings

Applications

Application Area

Thermal Insulation

Application Method

Trowel

Applications & Uses

Preparation and Application Information

Material Preparation

• Do Not Thin.
• Stir well, but do not use sticks or boards, which would splinter or otherwise contaminate the product.
• Apply only to clean, dry, oil-free surfaces.
• Keep container closed when not in use.
• Foster® 65-05 cannot be successfully applied by brush or spray.

Application 

• Proper and complete flashing is required.
• Follow flashing specifications.
• If a decorative coating is to be used over the FIRE RESISTIVE C.I. MasticTM, allow a minimum of 30 days drying time before application.
• Outdoor and Heavy Duty Service: Prime dusty insulation or porous cements with 65-05 cut 50/50 with mineral spirits. Apply a tack coat of Foster® FIRE RESISTIVE C.I. MasticTM at a thickness of 1/16 inch (1.6 mm). This is equivalent to 4 gallons per 100 square feet (1.6 l/m2). Embed Foster® MAST-A- FAB® White Membrane into wet tack coat. Smooth membrane to avoid wrinkles and overlap all seams at least 2 inches (5 cm). Apply a finish coat of FIRE RESISTIVE C.I. MasticTM at a minimum thickness of 1/8 inch (3.2 mm). This is equivalent to 8 gallons per 100 square feet (3.3 l/m2). This finish coat shall be applied no later than 1 hour after the tack coat and shall completely cover membrane. This application shall provide a minimum dry film thickness of 125 mils (3.2 mm).
• Heavy Duty Applications – Up to 50% Greater Tensile Strength: Apply as above, substituting CHIL-GLAS® #5 as the reinforcing membrane. Note that the membrane weave pattern will show through the dried mastic.
• Trowel: Use clean tools and equipment. Work in long, even strokes to ensure uniform thickness. Wet tools in mineral spirits (flammable) occasionally to prevent build-up of dried mastic.

Clean Up 

• Clean tools and equipment with mineral spirits (flammable) or chlorinated solvent (non-flammable).

Features

Ready-to-Use Product Features

Good Weather Stability,

Outdoor Durability,

UV Resistant,

Fire-Resistant

Features & Benefits

Product Highlights

• FOSTER® FIRE RESISTIVE C.I. MASTIC™ is a tough, durable, high solids, vapor retarder and weather barrier mastic for the protection of thermal insulation in outdoor service.
• Its excellent weather and fire resistance makes it suitable for use in place of conventional asphalt cutback mastic.
• It is an ideal surface coating for low temperature insulating applications where the insulation used is not affected by mild solvents.
• FIRE RESISTIVE C.I. MASTIC™ may also be used on heated lines, vessels and equipment in intermittent or dual temperature service to prevent the entrance of water vapor into the insulation during off periods or on cold cycles.
• It is outdoor rated and UV resistant.

Packaging & Availability

Regional Availability

• Asia Pacific
• North America
• Latin America
• India/MiddleEast/Africa (IMEA)

Physical Properties

Color (Properties)

Black

Physical Form

Semi-solid

Properties

Shelf Life:

12 months

Application Properties

	Value	Units	Test Method / Conditions
Service Temperature Range	-40 to 93	°C	-

Typical Properties

	Value	Units	Test Method / Conditions
Average Non-Volatile Content	66	Vol(%)	ASTM D2369
Average Non-Volatile Content	76	Wt(%)	ASTM D2369
Coverage (0.192 inch wet film thickness)	12	gal/100ft²	-
Density	9.6	lbs/gal	ASTM D1475
Dry Film Thickness	3.2	mm	-
Drying Time (at 23°C, 50% RH, dry through)	6	days	-
Drying Time (at 23°C, 50% RH, set to touch)	6	hours	-
Flash Point (wet flammability)	40	°C	ASTM D93
Water Vapor Permeance	0.03	perms	ASTM F1249
Water Vapor Permeance (at 2.9 mm, dry film thickness)	0.017	perms	ASTM E96, Procedure A

Flame Characteristics

	Value	Units	Test Method / Conditions
Surface Flame Spread	35	-	ASTM E84

Regulatory & Compliance

Chemical Inventories

IECSC (China),

TSCA (USA)

Storage & Handling

Handling Conditions

• Always test foil and paper facings for acceptable adhesion before using.
• Outdoor horizontal surfaces must always drain completely.
• A pitch of at least 1/2" per foot (4 cm/m) is required.
• FIRE RESISTIVE C.I. MASTIC™ may weather to a dark gray color.
• Always test plastic materials for compatibility when using a solvent-based product.
• Do not use on polystyrene foam.

Shelf Life

12 months