DOWSIL™ 888 Silicone Joint Sealant

什么是 DOWSIL™ 888 Silicone Joint Sealant?

有效密封普通水泥混凝土 (PCC) 中的横向收缩和膨胀接头、纵向、中心线和肩接头。

Can be extruded from -20 to 120°F.
May be used in joints that are not uniform in width.
Movement capability 100% extension and 50% compression.
Low modulus.
Weather and UV resistant.
Fuel resistant-short term exposure. Refer to Dow form number 62-207 for more information.
One component, cold applied, ready-to-use as supplied; dispensed directly from the bulk container into the joint by hand or with an air-powered pump.
Unprimed adhesion – primer is not required for bonding to Portland cement concrete. For optimum adhesion, the surface must be clean, dry and frost-free.
Cure time – typically, the sealant will have a skin-over time of one hour or less at standard conditions.

应用优势
Application Temperature Range	-29 to 49 °C
Primerless Adhesion	Primerless
Resistance Type	Fuel Resistance, Jet Fuel Resistance

典型特性
Adhesion to	Concrete, Masonry
Appearance	Opaque
Chemistry	Neutral
Color	Grey
Durometer - Shore A	15
Modulus @ 150% Elongation, maximum	28 psi
Movement	Medium
Resistance Type	Ozone Resistance, Thermal, UV Cure, Water
Shelf Life	360 Days
Specific Gravity @ 25°C	1.48
Substrate	Porous