DOWSIL 791 Weatherproof facade sealant

Name: DOWSIL 791 Weatherproof facade sealant
Brand: Dow
Price: 55.74 PLN
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Color: Gray (Grey)

Capacity: 310ml (cartridge)

Cechy szczególne: Dobra przyczepność do wielu podłoży, Dobra wodoodporność, Klej/uszczelniacz jednoskładnikowy, Utwardzanie Alkoxy (Neutralny))

Niska temperatura: od -31°C do -50°C

Norma: EN 15651

Pojemność opakowania: 310ml

Wysoka temperatura: +151°C do 200°C

Zastosowanie: Szklenie strukturalne i uszczelnianie fasad, Wielozadaniowe

DOWSIL™ 791 Weatherproofing Sealant

A one-component weather-resistant sealant designed to seal structures against weather conditions

Application:

The highest quality sealant, waterproof silicone, specially designed
for general glazing and weather sealing

curtain walls and facades of brick and stone buildings
traditional construction products
glazed facades,
planar systems and general glazing,

Features and Benefits:

excellent performance
One component, low modulus, neutral curing silicone
It is ideal for extending, connecting and all other types of connections
Compatible with all DOWSIL™ structural sealants
Excellent weather resistance - resistant to UV radiation
high performance over a wide temperature range
High movement ability +/- 50%
Easy to apply - ready to use, as in the kit
Conforms to ISO 11600 F&G-25LM, ISO 9047 Class 50%, ATG, SNJF Vitrage et Façade Category 1, ASTM C-920, DIN 18540

Typical Properties

Adhesion to aluminium, anodised aluminium, brick, concrete, enamelled and reflective glass, fluorocarbon coated aluminium, glass, granite, heat strengthened glass, lightweight stone panels, limestone, low-e coated glass, marble, masonry, metal, metal panels, paint, plastic , polyester powder coating aluminium/steel, silicone, stainless steel, steel, stone, vinyl/PVC-U, wood

Appearance (Colours) Opaque, wide range of colors ( anthracite, white, brown, black, metal-steel grey, metal-grey, grey, limestone, colorless)

Durometer - Shore A 25-30

Movement Ability -50 to 50%

Flow/Sag (Drop): 0mm

Non-porous substrate

Shelf life 12 months

specific gravity 1.50 at 25°C

120 psi tensile strength

Properties

Test	Property	Unit	Value
	Binding system		alkoxy
	application temperature	°C	+5 to +40
	Temperature resistance	°C	-50 +150
CTM1 97B	Density		1.5
CTM 364C	Juicing speed	g/minute	220
CTM 98B	Skin formation time (23°C, 50% RH)	minutes	20
CTM 95A	Time to dust dry (23°C, 50% RH)	minutes	thirty
CTM 663A	Setting time (23°C, 50% RH) 1 day
CTM 663A	Setting time (23°C, 50% RH) 1 day	mm	2
	Three days	mm	4
	2 mm thick S2 dumb-bells (ISO2 37/DIN3 53 504)
CTM 137 A	Modulus at 100% elongation	MPa	0.45
CTM 137 A	Tensile strength	MPa	1.9
CTM 137 A	Lengthen, not at break	%	700
Technically approved joint 12x12x50 mm structural joint TA (ISO 8339/DIN 2-8339)
CTM 677	Modulus at 100% elongation	MPa	0.35
CTM 677	Tensile strength	MPa	0.75
CTM 677	Lengthen, not at break	%	380
CTM 99E	Hardness measured with a hardness tester	Shore A	29
ISO 7389	Post-deformation recovery	%	> 90
ISO 9047	Movement ability	%	±50

Specifications and Standards

Conforms to SNJF
ISO 11600-F&G-25LM
DIN 18540 Class F
EN 15651 - CE MARK

Benefits of the application

Primerless Adhesion: Primerless

Processing and formulation benefits

Curing system One-piece neutral curing
Curing at room temperature - days 7 to 14 days
Dry time (50% RH) 45 minutes
Working time 20 minutes

Durability and Storage

When stored at or below 30°C (86°F) in the original, unopened containers, this product has: a shelf life of 12 months from the date of manufacture.

packaging

DOWSIL™ 791 Silicone Weatherproofing Sealant is supplied in 310 ml cartridges and
600 ml of so-called "sausages"

How to use

Substrate preparation

Make sure that the surfaces to be sealed are clean, dry, sound and degreased. Clean non-porous surfaces with DOWSIL™ R-40 Universal Cleaner and dry thoroughly with a clean, lint-free cloth before applying the sealer.
Porous substrates such as concrete, brick, mortar, etc. should be mechanically cleaned of loose particles using a steel brush, grinding wheel or other similar means.

Primers are not required but may be useful for some specific substrates

Safeguard

Areas adjacent to joints must be masked with tape to prevent contamination of substrates and to ensure a neat sealing line. Masking tape should be removed immediately after processing.

Curing time

The joint should be machined within 5 minutes of application to ensure good contact between the sealant and the substrate. The sealant treatment also gives a smooth, professional finish.

Connector design

When designing joints using DOWSIL™ 791 Silicone Weathering Sealant, the minimum width should be 6 mm. For joints wider than 12 mm, a width to depth ratio of 2:1 should be used. In situations where fillet welds are required, a minimum of 6mm of sealant per substrate is recommended. For joint dimensions greater than 25 mm wide or greater than 15 mm deep, please contact your regional service center for technical assistance.