DOWSIL™ 756 SMS Building Sealant

What is DOWSIL™ 756 SMS Building Sealant?

A one-part, medium-modulus, neutral-curing silicone elastomeric sealant for weathersealing sensitive substrates where the aesthetic performance of the sealant is important. The sealant is intended for weathersealing skylights, glass facades, porous natural stone, and panel systems where staining and residue rundown streaking must be minimized. It is available in a variety of colors.

Uses

Expansion and control joints
Metal panel joints
Curtainwall joints
Joints between natural stone
Perimeter seals around window frames
New and remedial construction

Benefits

Cures to form a unique sleek, dry matte finish surface
Improved aesthetic performance reduces long-term residue rundown on metal panels and reflective glass or staining on porous substrates
Good working and tooling time
All-temperature gunnability from -29 to 50°C (-20 to 122°F), permitting application in all seasons
Medium-modulus
± 50% joint movement capability
Unprimed adhesion to most glass, brick, granite and fluoropolymer painted substrates
Primed adhesion to other common construction substrates, such as marble, limestone and concrete
Excellent weatherability non-reverting silicone durability
Compatible with open-cell polyurethane, closed-cell polyethylene and nongassing polyolefin backer rods

Properties

app.properties.Title
Application Temperature Range	-29 to 50 °C
Matte Look	true
Movement Capability	50 %
Primerless Adhesion	Primerless
Special Features	Non Stain Sealant

product.use.formulating.properties.Title
Cure System	1-Part Cure
Cure Type	Neutral Cure
Number of Parts	One
Room Temperature Cure - Hours	168 to 336 Hours
Tack-Free Time-50% RH	120 Minutes
Where Used	Job Site
Working Time	30 Minutes

typical.properties.Title
Adhesion to	Alodine Aluminum, Aluminum, Anodized Aluminum, Brickwork, Ceramic, Concrete, Enamelled and Reflective Glass, Extruded Mill Finish, Fluorocarbon Coated Aluminum, Glass, Granite, Heat Strengthened Glass, Light-Weight Stone Panels, Limestone, Low E Coated Glass, Marble, Masonry, Metal, Metal Panels, Paint, Plastic, Polyester Powder Coated Aluminum/Steel, Silicone, Stainless Steel, Steel, Stone, Vinyl/PVC-U, Wood
Appearance	Opaque
Chemistry	Neutral
Color	Adobe Tan, Black, Bronze, Grey, Limestone, Precast White, White
Durometer - Shore A	35 Shore A
Elongation	1200 %
Flow/Sag (Slump)	2.54 mm
Movement	Medium
Peel Strength	> 25 ppi
Shelf Life	360 Days
Substrate	Porous
Tensile Strength	200 psi
Volatile Organic Content	86 g/liter