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3M™ 4200
Fast Skinning, Low Modulus Polyurethane Adhesive/Sealant
A general purpose sealant for all normal bonding, bedding and sealing.

3M 4200
Physical Properties  
Hardness: 40 (Shore A)
Tack Free Time: 1-2 hrs. @ 75°F (24°C), 50% R.H.
Service Temperature: -40°F (-40°C) to 190°F (88°C)
Tensile Strength: 300 psi (21.09 kg/cm²)
Elongation: 750%

Description
3M™ 4200 is a one-part moisture curing, caulk-gun applied polyurethane sealant. 3M™ 4200 is low modulus, durable, flexible, and offers excellent performance in seams and moving joints. 3M™ 4200 does not require a primer on most materials, but it adheres very well to wood, cured epoxy-coated surfaces, fiberglass laminates, and most plastics except polypropylene and polyethylene. Its flexibility allows for dissipation of stress caused by shock, vibration, swelling or shrinking.

Basic Uses
3M™ 4200 is an excellent general purpose sealant designed for use on bare wood, epoxy-treated wood, fiberglass laminates, concrete and masonry construction joints, and vinyl siding. 3M™ 4200 is suitable for continual immersion in water. 3M™ 4200 is designed for interior and exterior use.

Limitations
Do not apply over damp or contaminated surfaces. Substances that will contaminate a surface include glycols or products suspended in glycol, waxes or products with a wax base, substances that contain or contained silicones. Surfaces should be dry and clean to the base substrate. Penetrating epoxy coatings on the substrate should be fully cured before 3M™ 4200 is applied. Use with adequate ventilation. Alcohols should not be used in preparation for bonding as it will stop the curing process, causing the adhesive to fail.

Packaging
Immediately available in 10.1 oz. (300 ml) gun cartridges.


Stocked Colors
White Black
Stocked in 10 oz. cartridges in white and black.
White
Black

Application Recommendations
May be used in any vertical or horizontal joint, seam or crack. Applicator tip should be cut to the width of the joint, the inner seal punctured, the nozzle screwed in place. Knock out the bottom end seal of the cartridge and place cartridge in caulking gun. Closed cell polyethylene rods or adhesive-backed polyethylene tape can be used to control the depth of the sealant bead on very deep seams. 3M™ 4200 applied to a depth at least equal to the width of the joint.

Surface Preparation
For best adhesion, the joint interface must be clean and dry. The joint surface may require a thorough wire brushing, grinding, sandblasting, or solvent washing. A primer such as CPES™ (Clear Penetrating Epoxy Sealer) can be used if desired. Primed surfaces should be cured before 3M™ 4200 is applied. Toluene or acetone can be used to clean surfaces. Alcohols should not be used in preparation for bonding as it will stop the curing process, causing the adhesive to fail.

Application
3M™ 4200 is easy to apply with conventional caulking equipment. Cut the plastic nozzle tip to the desired bead size. Puncture the seal in nozzle end of the cartridge and screw the plastic nozzle into place. Remove the bottom end seal of cartridge and place the cartridge in a caulk gun. Apply 3M™ 4200 to the seam or part to be bonded. Position parts. Fill joint or bonding area completely and tool. Closed cell polyethylene rods or adhesive-backed polyethylene tape can be used to control the depth of the sealant bead on very deep seams. At 75°F (24°C), 50% R.H. is tack-free in 1-2 hours. 3M™ 4200 is fully cured in 24-48 hours @ 1/4" depth. The cure rate is lengthened at lower temperatures and less humidity. 3M™ 4200 will accept some paints. We recommend you test your paint for suitability.

Tooling & Cleaning
Tooling is recommended immediately after application to insure firm, intimate contact with the joint or seam interface. Dry tooling is preferred, although tooling agents (such as soapy water) can be used. Excess sealant and smears adjacent to the joint can be removed with xylene, toluene or mineral spirits before sealant cures. After sealant cures excess compound can be cut away with a blade.


Here is a chart that will help you estimate how many cartridges you will need for any application:

Chart


For additional information, refer to the 3M™ 4200 Material Safety Data Sheet.




www.rotdoctor.comWood Treatment and Preservation Products
OrderProductsUsing EpoxiesUsing PolyurethanesTestingWooden BoatsFiberglass BoatsHomesLog HomesQ and A
Product Line and Price ListMSDS SheetsApplication Guide

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