BMS-302 Crystalline Waterproofing Agent (External Application)

BMS-302 Crystalline Waterproofing Agent (External Application)

1. Product Introduction

What is BMS-302 Crystalline Waterproofing Agent?

BMS-302 is an external-application crystalline waterproofing agent formulated using selected Portland cement and multiple active chemical agents based on a proprietary recipe. It comes in powder form, is non-toxic and eco-friendly, and is applied to concrete surfaces by brushing or spraying. Its active components penetrate deep into the concrete substrate, permanently self-healing micro-cracks, pores, and capillary tracts to reduce permeability. Even after the surface coating is removed or damaged, the internal waterproofing layer remains fully functional, providing long-term structural protection.

How Does It Work?

Self-Healing and Waterproofing: Cement hydration generates C-S-H gel and Ca(OH)₂, leaving unhydrated cement particles and latently reactive materials within the matrix. When water penetrates, the active components in BMS-302 react with these materials to accelerate crystalline precipitate formation, densifying micro-cracks and defects through cementation.

Active Component Reactivation: The active substances chemically complex with free Ca²⁺ in the cement matrix, forming water-soluble, unstable calcium complexes. These complexes migrate through structural pores with water, form more stable crystals upon encountering reactive materials, and regenerate as free radicals to continue migrating.

Continuous Cyclic Process: Crystal formations accumulate in structural defects, creating a densely cemented impermeable zone. When the structure is dry, active components remain dormant; upon water infiltration, they are reactivated to generate new crystals.

Why Choose BMS-302 from Shengchuan?

20 Years of Focused R&D: Built on Zhongsen Holding Group's deep expertise in waterproofing and construction materials.

43+ National Patents: Protected by extensive intellectual property in green cement additives and waterproofing technologies.

Top University Partnerships: Ongoing industry-academia cooperation with Tsinghua University, University of Science and Technology Beijing, and University of Jinan.

National Standards Contributor: Participation in national key R&D projects and contribution to 6 national industry standards.

Proven Performance: Independently tested against international brands, with superior results in impermeability after coating removal.

2. Technical Indicators

Parameter	Specification	Remarks
Appearance	Off-white uniform fine powder, no lumps	—
Fineness (0.63mm residue)	0%	—
Moisture Content	≤ 1.0%	—
Chloride Ion Content	≤ 0.1%	Safe for reinforced concrete
Recommended Application Rate	1.5 kg/m²	Coating thickness: 1.0 ± 0.2 mm

3. Key Benefits

Performance Area	Expected Improvement
Self-Healing	Self-heals 0.4-1.0mm cracks; significantly reduces seepage in 1.0-2.0mm cracks
Compressive Strength	5% – 15% increase
Service Life	Extends concrete durability to 60+ years
Permanent Waterproofing	Coating removal does not affect internal waterproofing performance
Freeze-Thaw Resistance	Enhanced durability in cyclic freeze-thaw conditions
Chloride Resistance	Reduced chloride ion penetration; protects reinforcement
Carbonation Resistance	Improved resistance to carbonation-induced deterioration
Alkali-Aggregate Reaction	Effectively inhibits AAR

4. Performance Data

Comparison with International Brands

Test Item	Technical Requirement	BMS-302	Canadian Brand	US Brand
28d Flexural Strength (MPa)	≥ 2.8	6.4	5.1	4.6
28d Compressive Strength (MPa)	≥ 15.0	26.9	20.1	21.8
28d Wet-Base Adhesion (MPa)	≥ 1.0	1.8	1.7	1.5
Coating Impermeability Pressure Ratio (%)	≥ 250	300	250	250
After Coating Removal Impermeability Ratio (%)	≥ 175	225	200	200
28d Coated Concrete Impermeability Pressure (MPa)	—	1.1	1.0	1.0
28d After Coating Removal Impermeability Pressure (MPa)	—	0.9	0.8	0.8
56d Second Impermeability Pressure (MPa)	≥ 0.8	1.0	0.9	0.9

5. Frequently Asked Questions

Q: Can BMS-302 still repair newly formed cracks upon contact with water after drying?

A: Yes. The latent active components that penetrate the substrate remain present over the long term. If micro-cracks develop and water infiltrates later, a crystallization reaction occurs again to seal the fissures, enabling repeated self-healing through wet-dry cycles.

Q: Will BMS-302 lose its self-healing capability in a dry environment?

A: No. The active components remain dormant; the crystallization-based repair process reactivates upon subsequent contact with moisture.

Q: Can BMS-302 be used for drinking water tanks?

A: Yes. It is made from non-toxic, harmless inorganic mineral raw materials and does not leach harmful ions, meeting the standards for materials used in drinking water projects.

Q: Will the waterproofing effect be lost if the coating peels off or becomes damaged later on?

A: No. The slurry penetrates the concrete to form permanent crystals. Even if the surface coating wears away or peels off, a dense waterproof layer has already formed within the substrate. This ensures continued impermeability and crack self-healing capabilities—distinguishing it from standard waterproofing membranes or simple surface coatings.

6. Application Scope

Application	Benefit
Repair of Leaks in Aging Structures	Apply directly to damp surfaces; seals cracks via penetrating crystallization; no demolition required
New Construction Water-Facing Side Waterproofing	Surface penetration reinforces substrate; retains impermeability even after coating damage
Anti-Corrosion for Hydraulic & Marine Engineering	Blocks corrosive ions, repeatedly self-heals in tidal environments

7. Usage Guidelines

Brushing Method: Mix ratio (material:water) = 5:2. Mix to a paste consistency, let stand 10 minutes, stir again until powder is completely dissolved and lump-free. Application rate: 1.5 kg/m², coating thickness: 1.0 ± 0.2 mm.

Spraying Method: Mix ratio (material:water) = 2:1. Apply by spraying equipment.

Application Process: Apply second coat after the first coat has dried and set; direction of the second coat should be perpendicular to the first. Keep the waterproof coating moist after application; spray with water 2-4 times daily for at least 3 consecutive days. Increase spraying frequency during hot or dry weather. Protect from rain and frost for 2 days following application. For long-term water immersion, allow the waterproof layer to cure for at least 14 days before filling with water.

8. Related Products

BMS-301 Crystalline Waterproofing Agent (Internal Mix) – For internal concrete admixture.

ZS-High-Efficiency Enhanced Grinding Aid – For maximum clinker replacement.

ZS-Cement Strength Enhancer – For further strength improvement.

ZS-Hexavalent Chromium Reducer – For environmental compliance.

9. Call to Action

Our engineering team is available for virtual or on-site technical support. Contact us today for a free waterproofing solution analysis tailored to your project.

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