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TO 1-1-700 - Robins Air Force Base

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<strong>TO</strong> 1-1-<strong>700</strong><br />

Table 12-1. Sealing Compounds - Continued<br />

Specification Types Available Properties Intended Use<br />

SAE AMS 3374, SEALANT, SILICONE 75<br />

MIL-S-85420, SEALING COMPOUND, QUICK<br />

REPAIR, LOW TEMPERATURE CURING 53<br />

SAE AMS 3374 /1, /2, /3, & /4<br />

(supersedes MIL-S-38249),<br />

Sealing Compound, <strong>Air</strong>craft<br />

Firewall<br />

/1= Type 1<br />

/2= Type 2<br />

/3= Type 3<br />

/4= Type 4<br />

Type 1 (one-part high<br />

temp. silicone) - condensation<br />

cured<br />

Type 2 (two-part high<br />

temp. silicone) - addition<br />

cured<br />

Type 3 (two-part high<br />

temp. silicone) - condensation<br />

cured<br />

Type 4 (two-part<br />

polysulfide)<br />

One-component, Type 1;<br />

Two components, Types 2, 3,<br />

& 4;<br />

Room temp cure;<br />

Service Temp; -65 ºF to +400 ºF<br />

(-54 °C to + 204 °C); withstands<br />

flash temperature of 2000 °F<br />

(1093 °C);<br />

Peel strength: 10 lb/in width<br />

(min);<br />

No corrosion inhibitors;<br />

Sealing structures exposed to<br />

very high temperatures<br />

against the passage of air and<br />

vapors. Cures on exposure to<br />

air.<br />

NOTE: Although this sealant<br />

was originally intended for<br />

sealing aircraft firewalls, it is<br />

included here because it is<br />

used for other applications.<br />

Resists fuel, oil, and hydraulic<br />

fluid.<br />

MIL-S-85420, Sealing Compounds,<br />

Quick Repair, Low<br />

Temperature Curing Polysulfide,<br />

for <strong>Air</strong>craft Structures<br />

Type I dichromate cure system<br />

Type II manganese cure system<br />

Class A (thin) - for<br />

brush application<br />

Class B (thick) - for<br />

sealant gun or spatula<br />

application<br />

Two-components;<br />

Low Temp Cure;<br />

Service Temp: -65 ºF to +200 ºF<br />

(-54 °C to + 93 °C);<br />

Peel strength: 10 lb/in width<br />

(min);<br />

Quick repair sealing of structures<br />

at low temperatures.<br />

Use only with the recommended<br />

adhesion promoter/<br />

primer for optimum results.<br />

This sealant should be stored<br />

at a temperature not to<br />

exceed +80 ºF or poor adhesion<br />

will result.<br />

No corrosion inhibitors;<br />

Resists fuel, oil, and hydraulic<br />

fluid.<br />

NOTE: Although this sealant<br />

was originally intended for<br />

sealing aircraft structures, it<br />

is included here because it is<br />

used for other applications.<br />

12-5

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