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Weather-resistant sealant for construction
MS320 is a low-modulus, non-exuding pollution-resistant weatherproof sealant. It relies on absorbing moisture from the air to cure and gradually reacts to form a soft elastomer. The product combines excellent weather resistance and outstanding adhesion. After the surface of the sealant cures, paint can be directly applied on top, maintaining elasticity over time without discoloration or cracking. It is suitable for filling and weatherproof sealing of joints on the interior and exterior walls of buildings.

Advantage

Typical Performance

Appearance

Color

Various

Appearance

Paste

Density

g/cm³

1.4

Anti-sagging

Horizontal sagging

<1mm

Vertical sagging

<1mm

Extrusion rate

ml/min

>350ml/min

Curing speed

Gel time

120min

Curing completion time

4 weeks

Hardness

Shore A

15~20A

Tensile stress strain

Tensile strength (TS)

0.5MPa

100% tensile strength (M100)

About 0.2MPa

Break elongation rate EB (%)

About 500%

Elastic recovery rate

According to 25LM level

70~85%

Constant elongation adhesion

Masonry board

No damage

Constant elongation adhesion after cold drawing and hot pressing

Masonry board

No damage

Constant elongation adhesion after immersion

Masonry board

No damage

Peel strength (180°)

Granite

>3N/mm

Curing shrinkage

Shrinkage rate

≤1.5%

Main applications

Typical Applications

Qualification

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