Foster® FOAMSEAL™ 30-45N SEALANT

• FOAMSEAL™ 30-45N Sealant seals the joints of cellular glass, PIR, polystyrene and other insulations against the entrance of moisture.
• When used as a vapor stop bedding compound on iron or steel surfaces and as a joint sealant, 30-45N provides additional protection to the blocks of insulation.
• Damage to the insulation due to migration of moisture is minimized.
• FOAMSEAL™ 30-45N Sealant is water and weather resistant and is often used as a sealant and flashing compound where structural parts must penetrate an insulation surface.
• It is also suggested for use to seal seams in metal jacketing.
• FOAMSEAL™ 30-45N Sealant meets the requirements of:
  • MAS Certified Green®
  • California Dept. of Public Health Standard Method v1.2
  • VOC Emissions and Content requirements to contribute to LEED v4 EQ Credit: Low Emitting Materials – Paints and Coatings
  • Collaborative for High Performance Schools EQ 7.1

Material Preparation

• Do not thin.
• Apply only to clean, dry surfaces.
• Keep container closed when not in use.

Application 

• Apply by trowel, putty knife, power extrusion or bulk caulking gun.
• When sealing insulation joints, apply FOAMSEAL™ 30-45N sealant at 1/16- to 1/8-inch wet film thickness (1.6 to 3.2 mm) and press mating surfaces together firmly to squeeze out air bubbles and to obtain complete contact.
• When flashing, do not trowel out to feather edge, but maintain a minimum of 1/8-inch wet film thickness (3.2 mm) throughout the entire area of use. Use membrane as specified.
• For best results, allow to cure 24 – 48 hours before top coating with solvent-based elastomeric mastics or coatings.
• Note: Pressurized piping made from copper and aluminum alloys may be susceptible to corrosion under insulation when moisture is present and 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.

Joint sealant for metal jacketing systems

• All joints of aluminum or stainless steel jacketing shall be weather sealed by applying a 1/8” (0.31 cm) bead of 30-45N sealant underneath the lap.
• Jacketing shall be firmly embedded and pulled up tight.
• All overflow of sealant shall be removed with solvents.

Power extrusion 

• FOAMSEAL™ 30-45N sealant may be applied using a wide variety of power (pressure) extrusion equipment suitable for use with oil-based sealants.
• Typical viscosity range: 0.5 – 1.0 million cps.

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

• Store between 40°F (4°C) and 100°F (38°C).
• Apply between 50°F (10°C) and 110°F (43°C).
• Allow to cure one week before placing in heated service.
• At temperatures above 200°F, the sealant may harden and become discolored while maintaining its seal.
• Not suggested for use under solvent-based elastomeric mastics and coatings if minor surface discoloration and/or dirt pick-up would be objectionable.
• Discoloration can be minimized by allowing 24 to 48 hours cure time before top coating.
• Make certain this product is completely dry and the area free from product odor if food is involved.
• Will form a skin where exposed resulting in a greenish gray surface color on aging.
• Remove excess sealant from the surface of jacketing where the color change will be objectionable