Foster® 95-55 Sealant

• 95-55 Sealant is primarily used with low temperature insulation to prevent the migration of water and water vapor into the insulation system via butt joints.
• 95-55 Sealant is also recommended as a bedding compound for the installation of cellular glass insulation. In this application, it protects insulation from abrasion as well as water vapor migration at the bore.
• 95-55 Sealant may also be used to seal overlaps in metal jacketing in conjunction with mechanical fastening. The sealant shall be within, not over, the lap joint.

Coverage Range

Trowel:

• 12 to 25 sq. ft./gal. (0.29 to 0.61 m²/l)
• 1/8 in. to 1/16 in. wet film thickness (3.2 mm to 1.6 mm)

Drying Time

• Non-Skinning

• Store and apply between 40°F and 100°F.
• Always test solvent plastic materials for compatibility when using a solvent base product.
• Not suggested for use under solvent base mastics and coatings, if minor surface discoloration and/or dirt pick-up would be objectionable. Where Foster 60-95 / 60-96 Monolar coating is being used over sealed insulation joints select Foster 95-50, 30-45N or 95-44 sealants for best results.
• Do not use this product where surface temperature will exceed 200°F.
• Not suggested for use as an exposed flashing compound. Select Foster 95-44 sealant or 95-88 sealant for this purpose.

Material Preparation

• Do not thin. Apply only to clean, dry, oil-free surfaces. Keep container closed when not in use. Ensure insulation is well fit before applying sealant. Joint width less than 1/8” (3 mm) for best results. Do not use sealant to fill large gaps.

Application

• Apply by trowel, putty knife or power extrusion. When sealing insulation joints, apply sealant to the edges of abutting sections at 1/16 in. to 1/8 in. (1.6 to 3.2 mm) wet film thickness and press mating surfaces together firmly to squeeze out air bubbles and to obtain complete contact. Strike off excess sealant on surface with trowel.
• Note: Pressurized piping made from copper and aluminum alloys may be susceptible to under insulation corrosion when in direct contact with many materials. When used as a joint sealant direct contact between pressurized pipes made from these metals and the sealant should be prevented.

Clean Up

• Use solvent such as chlorinated solvent (non-flammable) or mineral spirits (flammable) for cleaning tools and equipment.