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The Rot Doctor is going to discontinue the Dymonic FC,
it is being replaced by 3M™ 4200


Dymonic® FC
Dymonic FC

Fast Skinning, Low Modulus
Polyurethane Sealant

A general purpose sealant for all normal
bonding, bedding and sealing.

Physical Properties  
Hardness: 25 (Shore A)
Tack Free Time: 3-4 hrs. @ 75°F (24°C), 50% R.H.
Stain & Color Change: None
Adhesion-in-Peel: 18-25 pli
Movement Capability: ±35%


Description
Dymonic FC is a one-part moisture curing, caulk-gun applied polyurethane sealant. Dymonic FC is low modulus, durable, flexible, and offers excellent performance in seams and moving joints. Dymonic FC does not require a primer on most materials, but it adheres very well to cured epoxy-coated surfaces and fiberglass laminates.

Basic Uses
Dymonic FC 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. Dymonic FC is suitable for continual immersion in water. Dymonic FC 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 Dymonic FC is applied. Use with adequate ventilation.

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


Stocked Colors
Gray
Stocked in 10 oz. cartridges in gray.
Gray

Applicable Standards
Dymoinc FC meets or exceeds the requirements of the following specifications:

  • ASTM C 920, Type S, Grade NS, Class 35, Use NT, M, A, and O
  • U.S. Federal Specification TT-S-00230C, Class A, Type II
  • CAN/CGSB-19.13-M87

Application Recommendations
May be used in any vertical or horizontal joint, seam or crack. Application tube should be cut to the width of the joint and Dymonic FC applied to a depth at least equal to the width of the joint. Closed cell polyethylene rods or adhesive-backed polyethylene tape can be used to control the depth of the sealant bead on very deep seams.

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 Dymonic FC is applied.

Application
Dymonic FC is easy to apply with conventional caulking equipment. Fill joint completely and tool. At 75°F (24°C), 50% R.H. a durable skin forms within 24 hours. Curing continues at the rate of 1/16 inch (1.6mm) depth per day. The cure rate is lengthened at lower temperatures and less humidity. Dymonic FC can be painted after it has cured.

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 Dymonic FC 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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