Why It Matters
Penetrating sealers must make concrete/brick/stone hydrophobic in-depth (beading, reduced water/chloride uptake) while staying breathable and UV-durable
Solution Approach
Penetrating sealers must make concrete/brick/stone hydrophobic in-depth (beading, reduced water/chloride uptake) while staying breathable and UV-durable RawSource supplies the base chemicals that go into these programs. We can help with product selection, grade matching, and sourcing from multiple origins for supply security.
Typical Formulation Workflow
1
System & Substrate Assessment
Define the binder system (waterborne, solventborne, UV, powder), substrate, cure, and the VOC, durability, and appearance targets.
2
Additive & Resin Selection
Match resins, pigments and fillers, dispersants, rheology modifiers, defoamers, or biocides to the formulation and compatibility window.
3
Lab Let-Down & Optimization
Dial in loading and addition order through lab let-downs, checking dispersion, rheology, film properties, and storage stability.
4
Application & Performance Testing
Validate on the real application method and substrate, tracking gloss, adhesion, sag, cure, and weathering before scale-up.
Recommended Chemistries (3)
Methyltrimethoxysilane
CAS 1185-55-3
Silanes & Organosilanes
Primary construction water repellent silane
Small alkylsilane penetrates the pore network, hydrolyzes and bonds to silicate substrate, leaving outward-facing methyl groups that repel water
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Methyltriethoxysilane
CAS 2031-67-6
Silanes & Organosilanes
Ethoxy methyl silane — slower cure
Slower-hydrolyzing ethoxy analog gives deeper penetration before cure, anchoring a durable hydrophobic layer in concrete/masonry
Vapor Pressure: 11.0
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Tetraethyl orthosilicate (TEOS)
CAS 78-10-4
Specialty Additives
Coupling / Adhesion Promotion
1292 (ETHYL SILICATE) · Class Hydrolyzes to silica gel within the pore structure, consolidating friable stone/concrete as a co-component of penetrating treatments
Physical Description: Ethyl silicate appears as a clear colorless liq… Appearance: Colorless liquid Odor: Sharp alcohol-like odor
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