Foster® C.I. Mastic® 60-25

Identification

GBU

BAS

RTU Product Type

Solventborne Adhesive,

Mastic Coating

Categories

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

Technologies → Adhesives & Sealants → Product Families → Bonding Technology → Solvent-Based Nonreactive Adhesives

Applications

Application Area

Pipes,

Insulators,

Equipment

Application Method

Spray,

Trowel

Applications & Uses

Cleaning Information

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

Preparation and Application Information

• 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® 60 - 25  cannot be successfully applied by brush.
• Foster® 60 - 25 cannot be applied by spray.

Recommended Applications

• Prime dusty insulation or porous cements with 60-25 or 60-26 cut 50/50 with mineral spirits.
• Proper and complete flashing is required. Follow flashing specifications. If a decorative coating is to be used over the C.I. MASTIC®, allow a minimum of 30 days drying time before application.
• Outdoor and heavy duty service
  •  Apply a tack coat of Foster® C.I. MASTIC® at a thickness of 1/16 inch (1.6 mm).
  • This is equivalent to 4 gallons per 100 square feet (1.61 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 C.I. MASTIC® 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 the membrane.
  • This application shall provide a minimum dry film thickness of 123 mils (3.1 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.
• Spray
  • C.I. MASTIC® 60-26 may be airless spray applied using heavy duty pneumatic pumps.
  • Store 60-26 in a heated area. The material temperature should be at least 70°F (21°C) before spraying.
  • For spray equipment information, please consult Airless Spray Recommendations or contact your spray equipment supplier.
  • Average viscosity range: 100,000 – 150,000 cps.

Features

Ready-to-Use Product Features

Durable,

Good Toughness,

Vapor Barrier,

Low Vapor Permeance

Features & Benefits

Product Highlights

• Foster® c.I. Mastic® is a tough, durable, high solids, vapor Retarder, asphalt cutback mastic.
• Because of its low vapor Permeance, it is an ideal surface coating for low temperature Insulation on outdoor applications.
• C.I. Mastic® may 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.
• C.I. Mastic® may be used as a solvent-based adhesive for asphaltic felt vapor retarder jackets on pipe and duct insulation.
• C.I. Mastic® meets the requirements for water proofing mastics in the tri-service specification for underground heat distribution conduit Systems.

Packaging & Availability

Regional Availability

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

Physical Properties

Physical Form

Semi-solid

Properties

Shelf Life:

12 months

Application Properties

	Value	Units	Test Method / Conditions
Service Temperature Range	-40 to 82	°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 Range	min.12	gal./100 sq. ft	-
Coverage Range (wet film thickness)	0.192	inch	-
Density	9.4 - 10.0	lbs/gal	ASTM D1475
Drying Time (set to touch)	0.5 - 6	hours	-
Drying Time (through)	7	days	-
Flash Point (wet flammability)	40	°C	-
Storage Temperature	4 - 38	°C	-
Water Vapor Permeance (at 1/8 inch dry film thickness)	0.02	perms	ASTM F1249
Water Vapor Permeance (at 1/8 inch dry film thickness)	max. 0.015	perms	ASTM E96, Procedure A

Flame Characteristics

	Value	Units	Test Method / Conditions
Surface Flame Spread	145	-	ASTM E162

Regulatory & Compliance

Chemical Inventories

AICS (Australia),

ENCS (Japan),

IECSC (China),

PICCS (Phillipines),

TSCA Exempt (USA)

Storage & Handling

Handling Conditions

• Store and apply between 40°F (4°C) and 100°F (38°C).
• Always test foil and paper facings for acceptable adhesion before using.
• C.I. MASTIC® may weather to a dark gray color.
• Outdoor horizontal surfaces must always drain completely.
• A pitch of at least 1/2” per foot (4 cm/m) is required.
• Always test plastic materials for compatibility when using a solvent-based product.
• Do not use on polystyrene foam.

Shelf Life

12 months