Foster 30-45N Foamseal Sealant is a grey vapour barrier sealant designed for use with rigid thermal insulation including polystyrene foam. It remains flexible and tough in joints and will not shrink or crack during repeated cycles of high and low temperatures.
Foster 30-45N Foamseal Sealant seals the joints of cellular glass and other insulations against the entrance of moisture. When used as a bedding compound on iron or steel surfaces and as a joint sealant, Foster 30-45N Foamseal Sealant provides additional protection to the blocks of insulation. Damage to the insulation due to migration of moisture is minimized.
The product 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.
* Store between 4°C and 38°C
* Apply between 10°C and 43°C
* Allow to cure one week before placing in heated service.
*At temperatures above 93°C the sealant may harden and become discoloured while maintaining its seal.
*Not suggested for use under sovent base elastomeric mastics and coatings, if minor surface discolouration and /or dirt pick-up would be objectionable. Discolouration can be minimized by allowing 24-48 hours cure time before top coating.
*Make certain this product is completely dry and the area free from product odour if food is involved.
* As a vapour barrier
* Do not thin, apply only to clean dry surfaces. Keep container closed when not in use
Apply by trowel, putty knife, power extrusion or bulk caulking gun. When sealing insulation joints apply Foster 30-45N Foamseal Sealant at 1.6 to 3.3mm 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 3.2mm wet film thickness 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 aluminium alloys may be susceptible to under insulation corrosion 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 materials and the sealant should be prevented.
JOINT SEALANT FOR METAL JACKETING SYSTEMS
All joints fo aluminium or stainless steel jacketing shall be weather sealed by applying a 0.31cm bead of Foster 30-45N Sealant underneath the lap. Jacketing shall be firmly embedded and pulled up tight. All overflow of sealant shall be removed with solvents.
Foster 30-45N Foamseal 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
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