The Sealer,chemical, cataloged under National Stock Number 6850-01-177-5620, is classified within Federal Supply Class 6850 (Miscellaneous Chemical Specialties) of the Chemicals and Chemical Products group. The manufacturer of record is Dow Silicones Corporation. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6850-01-177-5620 |
| Primary Part Number | FIRESTOP 3-6548 18KG KIT |
| Item Name | Sealer,chemical |
| FSC / FSG | 6850 / 68 — Miscellaneous Chemical Specialties |
| Manufacturer | Dow Silicones Corporation |
| Status | ACTIVE |
| Special Test Features | STORE BELOW 130 DEG FAHRENHEIT |
| Supplementary Features | 36.2 KILOGRAM KIT (80 POUND KIT) LBS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Hazardous per DLA record (HMIC Y) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| FIRESTOP 3-6548 18KG KIT PRIMARY | Dow Silicones Corporation (USA) |
| FIRESTOP 3-6548 40 LB KT PRIMARY | Dow Silicones Corporation (USA) |
| DOWSIL 3-6548 PRIMARY | Dow Silicones Corporation (USA) |
| Reference | Meaning |
|---|---|
| FIRESTOP 3-6548 2LB KT | 5/9 Secondary reference Dow Silicones Corporation |
| FIRESTOP 3-6548 | 3/1 Design control — primary reference Dow Silicones Corporation |
| FIRESTOP 3-6548 0.9KG KT | 5/9 Secondary reference Dow Silicones Corporation |
NSN 6850-01-177-5620 is a Sealer,chemical, manufactured by Dow Silicones Corporation, classified under FSC 6850, Miscellaneous Chemical Specialties. Status: active.
NSN 6850-01-177-5620 has 3 manufacturer part numbers on file: FIRESTOP 3-6548 18KG KIT (Dow Silicones Corporation), FIRESTOP 3-6548 40 LB KT (Dow Silicones Corporation), DOWSIL 3-6548 (Dow Silicones Corporation).
Key specifications for FIRESTOP 3-6548 18KG KIT: Special Test Features: STORE BELOW 130 DEG FAHRENHEIT; Supplementary Features: 36.2 KILOGRAM KIT (80 POUND KIT) LBS; Special Features: CURES TO A FLEXIBLE FOAM; RESISTANT TO OZONE, UV AND TEMPERATURE EXTREMES; COLOR: GRAY; PHYSICAL FORM: LIQUID; MATERIAL: SILICONE; SPECIFIC USAGE: FOR SEALING FIRE RATED PENETRATIONS CONTAINING PIPES, CABLE OR DUCTWORK; SEPERATE CATALYST; QUANTITY WITHIN EACH UNIT PACKAGE: 36.2 KILOGRAM KIT; 18.1 KILOGRAM OF PART A AND 18.1 KILOGRAM OF PART B (TOTAL 36.2 KILOGRAM) KG. 2 specifications are documented in the U.S. Government catalog.
Hazardous per DLA record (HMIC Y). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.