Description | Typical Uses | Directions

Surface Preparation |Priming |Painting

Colors | Packaging

DESCRIPTION

        ASI 405 Industrial Silicone Sealant/Adhesive is a one-part, moisture curing, RTV (room temperature vulcanizing) silicone sealant/adhesive that cures to a strong, silicone rubber that maintains long-term durability and flexibility. ASI 405 is a non-slump sealant and can be applied on vertical or overhead surfaces without flowing or sagging. Because ASI 405 is a 100% silicone sealant, it has excellent resistance to weathering including ozone, ultraviolet radiation freeze-thaw conditions and airborne chemicals. Fully cured, ASI 405 has excellent adhesion to glass, metal, porcelain, ceramic, wood, most plastics and many other nonporous substrates. ASI 405 can be applied to surface temperatures from -18°C to +50°C (0°F to +120°F) and, after curing, withstands constant operating temperatures from -57°C to +204°C (-70°F to +400°F).
 
 

TYPICAL USES

        ASI 405 is an excellent sealant and/or adhesive for many industrial applications where a long term, permanently flexible bond or seal is required. Such applications include:
     formed-in-place gaskets for axle housings, differentials, junction box covers, etc.
     adhering appliance trim and sealing appliance parts
     adhering name plates, letters and signs
     sealing joints in ductwork
     sealing truck trailers, cabs, marine portholes and cabins
 
 

DIRECTIONS

        ASI 405 is ready to use and requires no mixing or additives. The cure mechanism begins as soon as the sealant comes in contact with the air. At conditions of 25°C (77°F) and 50% relative humidity, the sealant will skin in 20 minutes and fully cure in 24 hours (1/4" bead) and reaches its maximum adhesion in 7 days. Higher humidity accelerates cure. Tooling, if necessary, should be done before skinning takes place. In applications where partial or total confinement of sealant is prevalent, the time required for proper cure is generally lengthened by the degree of confinement.
 
 

SURFACE PREPARATION

        Provided that all bonding surfaces are clean and dry, ASI 405 has excellent unprimed adhesion to most substrates. If there is any doubt about contamination, surfaces should be solvent wiped with oil-free solvents, such as xylol, toluol, naphtha or non-flammable chlorinated solvents. Do not solvent wipe with oil-based solvents such as Varsol.
 
 

PRIMING

        Due to substrate variability, an evaluation should be made to determine bond strength for each specific application. If adhesion testing shows that a stronger bond is desired, use of a primer is suggested.
 
 

PAINTING

        ASI 405 sealant should not be applied to surfaces that will be painted. Painting over sealant is not recommended because the paint film does not stretch with the extension of the sealant and the adhesion of paint to ASI 405 is not adequate.
 
 

COLORS

        ASI 405’s colors are clear and white. Special colors are available upon request. Call for price and availability.
 
 

PACKAGING

        ASI 405 is supplied in 300 ml (10.2 fl.oz.) caulking cartridge; 5 gal. (40 lb.) pail and 55 gal. (450 lb.) drum.
 
 
 

*Non-corrosive to aluminum and steel per MIL-A- 46146A.

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