Firestop ES-105 : SpecSeal Elastomeric Firestop Sealant


• Water-based for easy installation & cleanup
• Non-halogenated
• Thixotropic for high-build application
• Auto bonding
• Safe, no solvents, no asbestos, No PCB’s, no inorganic fibers
• Elastomeric
• Water-resistant
• UL Certified
• Acoustical sealant
• Paintable when dry
• Meets LEEDTM v3, v4, & v4.1 requirements. Low emitting
materials credit. See general LEED letter for additional applicable credits.

Data Sheet



Firestop ES-105 Elastomeric Sealant is a non-halogenated latex-based, highly elastomeric caulk designed to provide passive smoke and fire protection in construction joints. This material is also designed to restore sound attenuation properties to sound-rated ceilings and partitions. Firestop ES-105 Elastomeric Sealant is engineered to adhere to virtually all construction surfaces and may be applied using standard caulking equipment or by troweling. SpecSeal ES Elastomeric Sealant dries to form a flexible shield against the propagation of fire. Its premium latex binder
system is totally resistant to water and will not re-emulsify after drying. SpecSeal ES Elastomeric Sealant contains no inorganic fibers, asbestos, or solvents.Contact Us.

SpecSeal ES Elastomeric Sealant is designed primarily for the protection of construction joints.

The fire protective sealant shall be a water-based, non-halogenated, elastomeric and shall contain no solvents, inorganic fibers, nor asbestos. The sealant shall dry to form a flexible, moisture resistant seal and shall adhere to all common construction surfaces. The sealant shall have demonstrated sound attentuation properties. The approved sealant shall be SpecSeal ES Elastomeric Sealant.

When applied to a wet film thickness of 1/4 in (6.3 mm) to 1/2 in (12.5 mm) over appropriate backing materials, SpecSeal ES Elastomeric Sealant has been successfully tested in one, two, three and four hour joints when tested
in accordance with UL2079 (ASTM E1966) and CAN/ULC S115. All tested systems have been cycled 500 times at total movement up to +/- 25%. Consult factory for individual system designs and application requirements.

Use product as per manufacturer’s instructions. Use only in applications per the manufacturer’s published designs or specific recommendations. End user must ultimately determine the suitability of the product and/or design to his or her specific requirements and assumes responsibility for its use. PRODUCT CONTAINS WATER AND IS CONDUCTIVE UNTIL DRY. DO NOT APPLY IN THE PRESENCE OF EXPOSED OR ENERGIZED ELECTRICAL CONDUCTORS.


STI Firestop

Additional information

Weight 28 kg
Dimensions 30.48 × 30.48 × 38.1 cm

Blue, Gray, Red


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