Vacuum Bagging Epoxy by SikaBiresin CR94 | Perigee Direct

Product Name

SikaBiresin CR94 Epoxy Laminating System

Brief Description

SikaBiresin CR94 is a 100 percent solids, two-component epoxy laminating system for standard wet layup and vacuum-bagging composite work. The low-viscosity resin wets reinforcement fabrics thoroughly, and three CH94 hardener speeds let fabricators match cure schedule to part size and shop conditions.

Popular Applications & Uses

• Wet layup fiberglass and carbon fiber laminates
• Vacuum-bagged composite parts
• Marine hull and deck construction and repair
• Aerospace tooling and composite components
• Transportation composite component fabrication
• Industrial composite parts production

Industries that Commonly Use It

• Marine: boat builders and repair yards use CR94 for hull, deck, and structural laminating work above and below the waterline.
• Aerospace/Defense: the low-viscosity resin and multiple hardener speeds suit composite tooling and part fabrication.
• Transportation/ Specialty Vehicle: used to laminate composite body and structural components.
• General Manufacturing: a standard epoxy laminating resin for shops producing composite parts.

Special and Unique Features

• Three hardener speeds: CH94-1 fast, CH94-3 medium, and CH94-6 slow let one resin cover a range of part sizes and working times.
• Low mixed viscosity: approximately 800 to 1,400 cps for thorough fabric wet-out and fewer trapped voids.
• Cure flexibility: cures at room temperature or can be post-cured per the process specification.

Key Properties

• Mix ratio: 100 parts resin to 27 parts hardener by weight.
• Mixed viscosity: approximately 800 to 1,400 cps.
• Pot life: roughly 20 to 30 minutes with CH94-1 fast hardener, up to about 100 to 130 minutes with CH94-6 slow hardener.
• Solids content: 100 percent.

Surface Compatibility

SikaBiresin CR94 bonds to common reinforcement fabrics used in composite fabrication:

• Fiberglass reinforcement
• Carbon fiber reinforcement
• Glass reinforced plastic (GRP)
• Fiberglass reinforced plastic (FRP)
• Composite laminate substrates

Known backups / known substitutes

• Sika does not publish a direct cross-reference for CR94; contact Perigee Direct to compare against other laminating systems in the catalog.

Comparison Note

SikaBiresin CR94 sits alongside SikaBiresin CR86 and CR72 in Perigee's composite laminating line. CR94 favors standard wet layup and vacuum bagging, CR86 is built for resin infusion and RTM, and CR72 adds a UV-resistant formulation for parts that see sun exposure.