Nelson Firestop - ES1399™ Elastomeric Sealant,10.3 OZ Tube,AA0870

MSRP: $23.50
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Nelson Fire Stop Products
Manufacturer: Nelson Fire Stop Products
Manufacturer Part No: AA0870
PHTS Number: NELAA0870

ES1399™ Elastomeric Sealant

Technical Data 

Product Description

Nelson Firestop Elastomeric Sealant (ES1399™) is a cost effective, water based acrylic latex, endothermic, fire protective sealant. It is designed for applications of through firestop penetrations and in construction joints. 


ES1399™ sealant can be applied using a conventional small caulk gun, bulk loader or by trowel. ES1399™ is applicable for through firestop penetrations and for floor to wall, floor-to-floor and head of wall applications. It is flexible and is ideal for applications where joint expansion and contraction can occur. Apply the required depth of sealant beginning on the edge of the opening (use over various backing materials as required). Insure that the sealant makes complete contact with the inside surface of the opening and also the surface of the penetrating item(s). On joints, the surfaces should be clean and free of dust, dirt, oil, grease, loose material, rust or other substances. Apply the required thickness in the joint or over the insulation if required. 


AA0870 – Non/Sag-10.3 oz Tube 18.5 in3 (304ml) 12/Ctn.


Underwriters Laboratories Inc.Fill, Void or Cavity Material (XHHW)

City of New York, New York, Department of Buildings. MEA 125-04-M


Up to 4-Hour ratings

Water-Based Acrylic Latex – Easy clean-up


Elastomeric (Flexible Cure)


Water Resistant

Acoustically Tested – Reduces noise transmission 

Physical Properties


Weight……………..10.75 lbs. per gallon


Application Temp…40°F (4°C) to 90°F (32°C)

STC Rating………………52

Test Compliance


Flame spread……………..0

Smoke developed….……30 

ASTM E90 Standard Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements 

ASTM E814 and UL1479 Test method for through stop fire penetrations. 

ASTM E1399 Test method for cyclic movement and measuring min. and max. joint width. 

ASTM E1966 and UL2079 Test method for fire resistance of building joint systems. 

Storage & Handling

Nelson ES1399™ should be stored at temperatures between 40°F (4°C) and 90°F (32°C). Protect from  freezing. Expected shelf life is one year from date of shipment. 

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