Foster® Elastolar® Sealant 95-44
1 of 34 products in this brandFoster® Elastolar® Sealant 95-44 is a flexible, fire-resistant sealant formulated with butyl elastomer. This vapor barrier sealant is intended for sealing joints in insulation (excluding polystyrene foam), metal, and masonry applications where maintaining a water-tight and air-tight seal is essential. It is suitable for use as a joint sealant in low-velocity duct air-conditioning systems and is particularly effective in sealing the laps of metal jacketing to prevent moisture ingress.
RTU Product Type: Elastomeric Sealant, Sealant
Application Area: Joints
Compatible Substrates & Surfaces: Masonry, Metal
Application Method: Gun, Trowel
Features: Fast Drying, Fire-Resistant, Flexible, Good Weather Fastness, Vapor Barrier
Enhanced TDS
Identification
- GBU
- RTU Product Type
- Categories
Applications
- Application Area
- Application Method
- Compatible Substrates & Surfaces
Applications & Uses
- Handling Conditions
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- Store and apply between 40°F and 100°F.
- Always test plastic materials for compatibility when using a solvent-based product.
- When used in exposed locations without top-coating, this product may darken or discolor due to surface dirt pick-up.
- This will not affect its performance.
- Make certain this product is completely dry and the area is free from solvent odor if food is involved.
- Select Foster® 30-45N for joint sealing polystyrene foam insulations.
- Preparation and Application Information
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Coverage Range
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Trowel:
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12 to 25 sq. ft./gal. (0.29 to 0.61 m2/l) 1/8 to 1/16 in. (3.2 to 1.6 mm) wet film thickness
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Cartridge Gun:
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125 linear ft. per 10.5 fluid oz. tube, 1/8 in. bead. (38 m per 0.31 l tube, 3.2 mm bead)
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30 linear ft. per 10.5 fluid oz. tube, 1/4 in. bead (9 m per 0.31 l tube, 6.4 mm bead)
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- Preparation and Application Information
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Material Preparation
- Do not thin. Apply only to clean, dry, oil-free surfaces. Keep container closed when not in use.
Application
- Joint Sealant:
- Apply by trowel, putty knife, caulking gun or power extrusion. When sealing insulation joints, apply ELASTOLAR® sealant to the edges of abutting sections at 1/16 in. to 1/8 in. (1.6 mm 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 a trowel.
- Note: Pressurized piping made from copper and aluminum 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 metals and the sealant should be prevented.
- Flashing Sealant:
- Sealant shall be applied over the adjoining surfaces a minimum of 2” (50 mm) and flashed a minimum of 2” (50 mm) in each direction onto adjacent insulation (or mastic) surface. Apply a tack coat at 1/16” (1.6 mm) wet film. Embed reinforcing membrane (Mast-A-Fab® or 10 x 10 glass mesh) into compound. Apply a finish coat at 1/16” (1.6 mm) wet film. Total film thickness to be 1/8” (3.2 mm) wet, giving a 70 mil (1.8 mm) dry film. Allow sealant to dry a minimum of 8 hours before applying finish mastic over its surface. When flashing, do not trowel out to feather edge, but maintain a minimum of 1/8” (3.2 mm) wet film thickness throughout entire area of use. For best application, the material temperature should be 60°F or higher.
- Metal Jacketing:
- Apply a 0.25” (6 mm) bead of sealant underneath the lap. Jacketing shall be firmly embedded and pulled up tight and banded in place. All overflow of sealant shall be removed with solvents.
Clean Up
- Use solvent such as chlorinated solvent (non-flammable) or mineral spirits (flammable) for cleaning tools and equipment.
Features
- Ready-to-Use Product Features
Features & Benefits
- Product Highlights
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- ELASTOLAR® Sealant is a fast-drying, vapor barrier sealant that can be top coated with most solvent-based, flexible, light-colored coatings without danger of bleed through. It is weather resistant and may be used outdoors without top coating.
- ELASTOLAR® Sealant is the preferred product for flashing projections and terminations where a complete moisture and vapor seal is required.
Packaging & Availability
- Packaging Type
- Regional Availability
Physical Properties
- Color (Properties)
Properties
- Surface Burning Characteristics
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- Flame Spread: 15
- Smoke Developed: 0
- Number of coats: 1
- Tested at coverage rate of 25 sq. ft./gal. (0.61 m2/l) in 2 in. (5 cm) strip. Applied to 1/4 inch (6.4 mm) inorganic reinforced cement board. The flame spread may vary at different product thicknesses and/or when applied over other surfaces.
- Application Properties
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Value Units Test Method / Conditions Service Temperature Limits (temperature at flashed surface) -55 to 121 °C - Service Temperature Range (joint sealant - cellular glass) -73 to 121 °C - Service Temperature Range (joint sealant - urethane foam) -101 to 93 °C - - Typical Properties
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Value Units Test Method / Conditions Average Non-Volatile Content (cartridge) 59 - 62 Vol(%) ASTM D2369 Average Non-Volatile Content (cartridge) 70 Wt(%) ASTM D2369 Average Non-Volatile Content (pail) 52 - 58 Vol(%) ASTM D2369 Average Non-Volatile Content (pail) 65 Wt(%) ASTM D2369 Coverage (cartridge gun) 125 linear ft. per 10.5 fluid oz. tube - Coverage (trowel, 3.2 - 1.6 mm wet film thickness) 12 - 25 ft²/gal - Density (cartridge) 9.5 lbs/gal ASTM D1475 Density (pail) 9.3 lbs/gal ASTM D1475 Drying Time (through) 72 hours - Drying Time (touch) 0.5 hour - Flash Point (wet flammability) 41 °C ASTM D3278 Smoke Developed 0 - ASTM E84 Storage Temperature 4 - 38 °C - Volatile Organic Compound Content (less water) 384 g/L - Water Vapor Permeance 0.02 perms ASTM F1249 - Flame Characteristics
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Value Units Test Method / Conditions Flame Spread 15 - ASTM E84
Regulatory & Compliance
- Chemical Inventories
Storage & Handling
- Shelf Life
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12 months