GAUDON alternative to DOW 791 for curtain wall and building facade joints

If you currently run DOW 791 on curtain wall and facade joints, this page sets out the GAUDON option, what the published specifications say, and where the two products differ. It is written to help you decide, not to make a claim we can't support.

Recommended GAUDON alternative

GAUDON G3 Exterior Façade High-Movement Silicone Sealant

High movement neutral cure silicone for exterior facades and the building envelope. Bonds to concrete, masonry, metal, glass, aluminum, ceramic, and stone. Stock colors are Black, White, Gray, Anodized Clear, and Dark Bronze with custom colors available. Available in 10.1 fl oz cartridge and 20 fl oz foil sausage.

Get a Quote Request Free Samples Product details

Specification comparison

ChemistryOne-part, neutral-cure, RTV silicone sealant100% silicone, Neutral Cure

ASTM C920 statusASTM C920 Type S, Grade NS, Class 50, Use NT, M, G, ANot classified

Movement class± 50 percent (ASTM C719 Joint Movement Capability)±50%, Class 50

Interior / exteriorNot statedAbove grade exterior and building envelope

PaintabilityNot paintableNot published in the GAUDON TDS

UV / weather resistanceMarketing claim only, no test methodPass, no failure after water and UV exposure, GB/T 14683 6.13

VOC content31g/L30 g/L or less, Rule 1168 compliant

Application temperatureNot stated40°F to 100°F

Service temperatureNot stated-40°F to 300°F (-40°C to 149°C)

Cure characteristicsTack-free time 40 minutes at 77 °F, 50% RH; Curing time 7 to 14 days at 77 °F (25 °C)Approx. 1.7 hours · 7 to 14 days, full section

Packaging size10.3 fl oz (305 mL) disposable plastic cartridges, 20 fl oz (590 mL) sausages10.1 fl oz cartridge or 20 fl oz sausage

Available colors7 colors, custom matchingBlack, White, Gray, Anodized Clear, Dark Bronze

Typical applicationsGeneral glazing and weather sealing in curtain wall and building facades; expansionFaçades, Curtain Walls, Expansion Joints

Key differences

Chemistry differs: DOW 791 is an one-part, neutral-cure, rtv silicone sealant, G3 is a 100% neutral cure silicone. Confirm paint and substrate requirements before switching.
G3's data sheet does not state a paintability position. If the joint must be painted, tell us the movement and exposure and technical sales will answer specifically.
Case pricing is quoted directly. Send a quote request with the quantity you need and we price it for you, then orders go by email or phone.

Different application?

Run the product you use today through SwitchLab and it returns the GAUDON match.

Open SwitchLab

G3 Technical Data Sheet (TDS v2.0 · July 2026)G3 Safety Data Sheet

Competitor names and specifications are the property of their respective manufacturers and are referenced for comparison only. Recommendations are based on published product information. Always review the applicable GAUDON TDS and confirm project-specific compatibility before use.