Foster® FOAMSEAL™ 30-45N SEALANT

1 of 184 products in this brand
Foster® FOAMSEAL™ 30-45N SEALANT is a gray vapor barrier sealant formulated for use with rigid thermal insulation, including polystyrene foam. This product maintains flexibility in joints and does not shrink or crack through repeated cycles of high and low temperatures.

Product Type: Sealant, Structural Sealant

Application Area: Joints

Compatible Substrates & Surfaces: Glass, Polystyrene (PS) Foam, Polyurethane (PU) Foam

Application Method: Trowel

Features: Good Weather Fastness, Vapor Barrier, Water Resistant

Enhanced TDS

Identification & Functionality

Features & Benefits

Product Highlights
  • 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

Applications & Uses

Application Area
Application Method
Preparation and Application Information

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.
Cleaning Information

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

Properties

Color
Physical Form
Typical Properties
ValueUnitsTest Method / Conditions
Average Weight / U.S. Gallon13.5lbs.ASTM D1475
Average Non-Volatile (by Volume)90.0% ASTM D2369
Average Non-Volatile (by Weight)95.0% ASTM D2369
Coverage Range (Trowel)12 - 25sq. ft./gal.-
Drying Time (to Touch, Skins Over)24.0Hours-
Drying Time (Full Set)7.0Days-
Water Vapor Permeance0.06PermsASTM F1249
Wet Flammability61.0°CASTM F1249
Application Properties
ValueUnitsTest Method / Conditions
Service Temperature Range-73 to 149°C-

Regulatory & Compliance

Storage & Handling

Shelf Life
12 months
Handling Conditions
  • 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