3M™ Aerospace Sealant AC-735 Class A is a non-chromate, corrosion inhibitive, fast cure, low density, polysulfide fuselage sealant. 3M™ AC-735 Class A Sealant has outstanding resistance to aviation gasoline and jet fuel, as well as resistance to chemicals and petroleum products common to the aircraft industry. The mixed compound is a pourable liquid easily applied by brush or roller.
Unit of Measure

Typical Physical and Application Properties

Base Color

N/A Off-White

Accelerator Color

N/A Brown

Mix Ratio (By Weight)

N/A 100 Base/10 Accelerator

Minimum Non-Volatile Content

N/A 84 %
Base Viscosity1 N/A 100 to 500 Poise

Note for Typical Physical and Application Properties

N/A The technical information and data should be considered representative or typical only and should not be used for specification purposes.

Application Life and Cure Time at 77 Degree Fahrenheit (ºF) and 50 Percent (%) Relative Humidity

Class

N/A A-1/2 A-2

Minimum Application Life for Class A-1/2

N/A 30 min

Minimum Application Life for Class A

N/A 2 hour

Note for Minimum Application Life

N/A Application life refers to the length of time that mixed compound remains at a consistency suitable for application with brush, spatula or caulking gun. Application life is always measured at a standard temperature of 77 ºF with a relative humidity level of 50 %. In general, for every 20 ºF rise in temperature, the application life is halved; and for every 20 ºF drop, it is doubled. High humidity levels, greater than 65 %, during the mixing process will shorten application life.

Typical Tack-Free Time for Class A-1/2

N/A 5 hour

Typical Tack-Free Time for Class A-2

N/A 10 hour

Note for Typical Tack-Free Time

N/A Tack-free time is the length of time after which a mixed sealant will no longer tightly adhere to L-LP-690 standard low density polyethylene film.

Typical Cure Time for Class A-1/2

N/A 24 hour

Typical Cure Time for Class A-2

N/A 48 hour

Note for Typical Cure Time

N/A Cure time is defined as the length of time it takes 3M™ Aerospace Sealant AC-735 Class A to reach 30A hardness. It depends on three factors: remaining application life, temperature and relative humidity. To a certain extent, the temperature/humidity factors for application life also apply to curing. To accelerate the curing process, apply heat up to (but not more than) 120 ºF.

Typical Physical and Performance Properties of Cured Compound after 14 Days at 77 Degree Fahrenheit (ºF)/50 Percent (%) Relative Humidity

Color

N/A Dark Brown

Specific Gravity

N/A 1.10

Hardness

N/A 42 to 48 Shore "A"

Low Temperature Flexibility

N/A No cracking, checking or adhesion loss when tested at -65 ºF (-54 ºC)

Service Temperature

N/A -65 to +250 ºF-54 to +121 ºC

Corrosion

N/A None

Repairability

N/A 34 piw/100% Cohesive Failure

Specifications

Industry Focus

N/A Aerospace

Relative Humidity

N/A 50 %

Applications

N/A Covering Fasteners Filling Voids Sealing Fuselages

Benefits

Benefits

N/A
  • 3M™ AC-735 is one of the lightest sealants available, driving excess weight out of your aircraft.
  • AC-735 is non-chromated, corrosion inhibiting sealant. Using a non-chromated product may help meet the requirements of OSHA's 29 CFR 1910.1026.
  • 3M™ AC-735 is convenient and easily applied

Storage

Storage

N/A The shelf life of 3M™ Aerospace Sealant AC-735 Class A is 9 months from date of packaging, when stored at temperatures below 80 ºF in its original unopened container.

Mixed 3M™ AC-735 Class A Sealant may be stored under refrigeration as follows:
  • 15 days at -10 ºF
  • 30 days at -40 ºF
It is important to remember that freezing, storing and thawing procedures reduce application life. In addition, frozen storage will reduce application life by varying amounts depending on the storage temperature and length of storage time. All aspects of storage, freezing and thawing should be planned carefully and it is not recommended to mix and freeze with less than 1/2-hour of available application time.

Health and Safety Precaution

Health and Safety Precaution

N/A Before using this product, read and understand the Safety Data Sheet (SDS), which provides information on health, physical and environmental hazards, handling precautions and first aid recommendations. An MSDS is available on request. Avoid overexposure. Obtain medical care in case of extreme overexposure.

These products were manufactured under a 3M™ Quality Management System registered to the AS9100 standard.

Technical Information

Technical Information

N/A The technical information, recommendations and other statements contained in this document are based upon tests or experience that 3M™ believes are reliable, but the accuracy or completeness of such information is not guaranteed.

Product Use

Product Use

N/A Many factors beyond 3M™'s control and uniquely within user's knowledge and control can affect the use and performance of a 3M™ product in a particular application. Given the variety of factors that can affect the use and performance of a 3M™ product, user is solely responsible for evaluating the 3M™ product and determining whether it is fit for a particular purpose and suitable for user's method of application. Consult local air quality regulations that may regulate product use.

Warranty, Limited Remedy, and Disclaimer

Warranty, Limited Remedy, and Disclaimer

N/A Many factors beyond 3M™'s control and uniquely within user's knowledge and control can affect the use and performance of a 3M™ product in a particular application. Given the variety of factors that can affect the use and performance of a 3M™ product, user is solely responsible for evaluating the 3M™ product and determining whether it is fit for a particular purpose and suitable for user's method of application.

Limitation of Liability

Limitation of Liability

N/A Except where prohibited by law, 3M™ will not be liable for any loss or damage arising from the 3M™ product, whether direct, indirect, special, incidental or consequential, regardless of the legal theory asserted, including warranty, contract, negligence or strict liability.

Accessories

Accessories

N/A Best in Class Application Tools

Part Number - 70-0052-0472-5
Part Name - Roll on Nozzle Assembly
Part Description - 3M™ Roll on nozzle assembly, 1 in. wide

Part Number - 70-0052-0473-3
Part Name - Roll on Nozzle Assembly
Part Description - 3M™ Roll on nozzle assembly, 2 in. wide

Part Number - 70-0052-0737-1
Part Name - Roll on Nozzle Assembly
Part Description - 3M™ Roll on nozzle assembly, 3 in. wide

Part Number - 70-0052-0738-9
Part Name - Roll on Nozzle Assembly
Part Description - 3M™ Roll on nozzle assembly, 4 in. wide

Part Number - 70-0052-0471-7
Part Name - 3M™ Roll on Nozzle Replacement
Part Description - 3M™ Roll on nozzle replacement, 1 in. wide

Part Number - 70-0052-0545-8
Part Name - 3M™ Roll on Nozzle Replacement
Part Description - 3M™ Roll on nozzle replacement, 2 in. wide

Part Number - 70-0052-0739-7
Part Name - 3M™ Roll on Nozzle Replacement
Part Description - 3M™ Roll on nozzle replacement, 3 in. wide

Part Number - 70-0052-0740-5
Part Name - 3M™ Roll on Nozzle Replacement
Part Description - 3M™ Roll on nozzle replacement, 4 in. wide

Note

Note

N/A These products were manufactured under a 3M™ Quality Management System registered to the AS9100 standard.
  • 1 RVF Brookfield #6 spindle @ 10 rpm, 77 ºF