Boss 389+ Neutral Weatherproofing Silicone Sealant - Black (290 ml)

By Boss

Colour

Key Features

Brand: Boss
Colour: Black
Curing Rate* (22°C / 50% R.H): 3mm / 24 hours

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Brand	Boss
Colour	Black
*Curing Rate (22°C / 50% R.H)**	3mm / 24 hours
Durometer Hardness, Shore A, points	25 - 32
Elongation	>300%
Maximum allowed distortion	0.25Service Temperature
Model No	Boss-389+-Black-290 ml
*Skin Formation Time (22°C / 50% R.H)**	10 - 30 min
Tensile Strength, N/mm²	1.5 - 2.0

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Product Description

The Boss 389+ Neutral Weatherproofing Silicone Sealant - Black (290 ml). Carefully engineered to offer superior performance, this silicone-based sealant ensures exceptional weatherproofing for your projects.

Key Features:

Compatible with all structural silicone sealant.
Good weather and temperature resistance.
Medium modulus – with expansion/compression capability up to ± 25% of the original joint width.
Neutral cure, with a long open time.
Permanently elastic after curing.

Applications:

Ideally suited for weatherproofing, waterproofing, sealing of expansion and control joints, and general-purpose glazing.
Other bondable surfaces include anodized aluminium, concrete, cement, wood, ceramics, and painted surfaces.
Works well with ACP, glass, glazed surfaces, and galvanized steel.