Dymonic FC

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(Please note that some colors might be special order, please call our help desk at 604-291-6101 for availability)

Product Description

Dymonic® FC is a low-modulus, one-component, moisture-cure, polyurethane hybrid sealant. Dymonic FC is formulated with proprietary silane end-capped polymer technology. Dymonic FC provides the best performance characteristics of polyurethane and silicone sealants.

Basic Uses

Dymonic FC is a durable, flexible, sealant that offers excellent performance in moving joints and exhibits tenacious adhesion once fully cured. Typical applications for Dymonic FC include expansion and control joints, precast concrete panel joints, perimeter caulking (windows, door, panels), EIFS, aluminum, masonry and vinyl siding.

Features and Benefits

Dymonic FC is fast curing with a skin time of 60 minutes and a tack-free time of 3-4 hours to significantly reduce dirt pickup. It will not green crack due to early movement and has an exceptional movement capability of ± 35%. Dymonic FC is also low-VOC, paintable and will not crack or craze under UV exposure.


Almond, Beige, Black, Anodized Aluminum, Aluminum Stone, Buff, Dark Bronze, Gray, Limestone, Off White, Redwood Tan, Stone, White, Natural Clay, Bronze and Ivory.


10.1 oz. (300mL) cartridges; 20 oz. (600mL) sausages; 2 gal. (7.6L), 3 gal. (11.4L) and 5 gal. (19L) pails. 

Coverage Rates

308 linear feet of joint per gallon for a 1/4 in. x 1/4 in. (6mm x 6mm) joint. For specific coverage rates that include joint size and usage efficiencies, visit our website usage calculator at www.tremcosealants.com.

Applicable Standards

Dymonic 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 ASTM C 1248
U.S. Federal Specification TT-S-00230C Class A, Type II
CAN/CGSB 19.13-M87

Fire-Rated Systems

FF-D-1063, FW-D-1059, HW-D-1054, WW-D-1054.

Joint Design

Dymonic FC may be used in any joint designed in accordance with accepted architectural/engineering practices. Joint width should be 4 times anticipated movement, but not less than 1/4 in. (6mm).

Joint Backing

Closed cell or reticulated polyethylene backer rod is recommended as joint backing to control sealant depth and
to ensure intimate contact of sealant with joint walls when tooling. Where depth of joint will prevent the use of backer rod, an adhesive backed polyethylene tape (bond breaker tape) should be used to prevent three-sided adhesion. All backing should be dry at time of sealant application.