ST-SC550 Polyaspartic Single Component Transparent Polyurea Coating

Product Introduction:
ST-SC550 is a single-component, transparent polyaspartic polyurea coating designed for easy application by brushing or rolling. This aliphatic, elastic material cures through a polymerization reaction even in moist conditions, resulting in a high-strength, highly elastic coating. The single-component formula simplifies application, eliminating the need for mixing multiple components, which makes it highly convenient for manual use.

Known for its aesthetic appeal, ST-SC550 offers excellent transparency and a glossy finish, enhancing surface appearance. In outdoor applications, it exhibits exceptional durability, retaining over 90% of its performance even after 10 years of UV exposure.

ST-SC550 Polyaspartic

Uses

mainly used for metal surface steel, concrete, wood, stone, ceramic tile and industrial floor.

Performance Index

product model	ST-SC550
Solid Content	≧80%
Waterproof Paint for Walking Time	＜12h
Tensile Strength (MPa)	≥8
Elongation at Break (%)	≥150%
Water Absorption	≤5%
Shore Hardness (Shore A)	≥70
Water Impermeability	0.3MPa, 120min, and impermeable
Tear Strength (N/mm)	≧40
Corrosion Resistance (2%H₂SO₄Solution, 168h)	No foaming, no falling off, no cracks
Weather Resistance (artificial accelerated aging for 1500h)	Excellent
Environmental Protection Performance	Meet the national environmental protection requirements
Abrasion Resistance (750g / 500r)	≤40mg

Construction Process Recommendations

1). Surface Preparation: Ensure the base surface is smooth, free of sand, peeling, honeycombing, or other defects. The surface should be dry, with no standing water present.

2). Primer Application: Apply a specialized sealing primer evenly on the base surface using spray, brush, or roller. Proper priming is essential, and untreated areas on the substrate are prohibited. Allow the primer to dry completely before proceeding to the next step. The interval between primer application and the next layer should not exceed 48 hours.

3). Polyurea Layer Application: Use manual application or standard cold spraying methods. Apply the polyurea layer generally 4-8 hours after primer application, within 48 hours at most. The recommended thickness for this layer is 1.5-3mm, ensuring complete, even coverage without gaps or pooling. Multiple passes may be used to achieve the desired thickness, which can be adjusted based on design requirements.

4). Top Coat Application: Apply the top coat manually by brushing or spraying, with a thickness of 0.2-0.3mm. Ensure an even, uniform finish across the surface.