Instructions and Precautions for Using Silicone Solid Waterproofing Agent

In the field of building waterproofing, silicone solid waterproofing agents have become the preferred material for modern engineering projects due to their exceptional permeability and durability. This white powdery substance forms a hydrophobic barrier within the substrate through chemical reactions, maintaining building breathability while effectively blocking moisture penetration. This article systematically outlines its proper application methods and safety precautions to help construction personnel maximize the material's performance.

Precise Preparation Before Construction

Substrate preparation is critical for waterproofing effectiveness. Thoroughly remove loose dust, oil stains, and loose particles from concrete, masonry, and other surfaces before application. For substrates with cracks or holes, use specialized repair mortar to fill and level them. Optimal environmental conditions require temperatures between 5-35°C (41-95°F) and relative humidity below 80%. Crucially, newly poured concrete must cure for at least 28 days before application to prevent alkaline substances from compromising film formation.

Scientific Application Technique

Mix the solid waterproofing agent with clean water at a 1:3 ratio. Use an electric mixer to stir until fully dissolved into a transparent liquid. Apply two overlapping coats using a low-pressure sprayer. After the first coat, allow 20 minutes for penetration and absorption before applying a reinforcement coat. For critical areas like tile joints and pipe bases, use a brush for targeted application. Avoid rain exposure for 12 hours post-application. During winter construction, extend the curing period to at least 48 hours.

In-Depth Understanding of Material Properties

This product forms a waterproof layer by reacting active silane with hydroxyl groups in the substrate. It is highly effective on silicate materials but ineffective on non-absorbent substrates like metal or plastic. The resulting protective layer withstands 0.3MPa hydrostatic pressure, maintains stable performance under UV exposure, and offers a service life exceeding 10 years in standard environments. Important note: Treated surfaces may reduce paint adhesion. Interface treatment is required before applying decorative coatings.

Comprehensive Safety Measures

Operators must wear protective gear including safety goggles and rubber gloves to prevent powder contact with eyes or skin. If powder enters eyes, immediately flush with copious amounts of water and seek medical attention. Store in a cool, dry location away from strong acids and alkalis. Keep sealed after opening to prevent moisture absorption and caking. Dispose of waste packaging according to hazardous chemical regulations; do not discard carelessly to avoid environmental contamination.

Diagnosis and Resolution of Common Issues

When waterproofing layers exhibit whitening, this is often caused by excessive environmental humidity during application. The affected area can be sanded and reapplied. For localized leaks, determine whether structural cracks are the cause. Structural reinforcement should be performed first, followed by waterproofing repairs. If waterproofing effectiveness diminishes during routine inspections, clean the surface with a specialized cleaner and apply a maintenance agent for restoration.