Premium silane-modified sealant designed for airport runways, highways, and heavy-duty concrete joints with long-term elasticity and durability.
Summary Benefits at a Glance:
Elastic & Durable: ≥75% elastic recovery after 100% elongation for 24h.
Fuel & Oil Resistant: Maintains adhesion under water, oil, and deicing conditions.
All-Weather Performance: Excellent flexibility from −40°C to +80°C, resistant to cracking and hardening.
Military-Grade Compliance: Meets GJB 1112A-2004 standard for airfield pavement joint sealing.
Product Introduction
MS12A Airport-Grade Silane-Modified Sealant is a one-component, high-performance hybrid sealant based on silane-modified polyester polymer.
It combines the elasticity of silicone with the strength and adhesion of polyurethane, providing excellent movement capability, long-term durability, and chemical resistance.
The product is designed for expansion and construction joints in airport pavements, runways, taxiways, highways, and industrial floors exposed to fuel, oil, and temperature fluctuations.
Complying with GJB 1112A-2004 Military Standard, MS12A ensures safe, durable, and flexible sealing under extreme conditions.
Key Features:
Hybrid SMP technology providing excellent adhesion without primer.
High elastic recovery and low modulus for dynamic joint movement.
Resistance to jet fuel, hydraulic oil, and deicing fluids.
Non-sagging, non-staining, UV and weather resistant.
Solvent-free, low VOC, and environmentally compliant.
Product Parameters
| Test Item | Condition | Performance Requirement |
| Flowability | — | Smooth, level surface |
| Tack-free time / h | — | As agreed by supplier and user |
| Elastic recovery / % | 100% elongation × 24h | ≥75 |
| Mass loss rate / % | 70°C × 7d | ≤5 |
| Tensile modulus / MPa | 23°C, 100% elongation | ≤0.4 |
| Tensile modulus / MPa | −20°C, 100% elongation | ≤0.6 |
| Adhesion after water immersion | 100% elongation × 24h | No failure |
| Adhesion after oil immersion | 100% elongation × 24h | No failure |
| Adhesion after thermal & cold cycle | −20°C/ +70°C, 25% deformation | No failure |
| Heat resistance | 260°C × 120 s | No burning, no flow, no cracking |
Product Usage
Application Scope:
Expansion and construction joints in airport runways, taxiways, and aprons.
Joint sealing for highways, bridges, and industrial concrete pavements.
Fuel and oil-resistant sealing for hangars, refueling areas, and workshops.
Waterproof sealing in tunnels, subways, and heavy-duty infrastructure projects.
Application Method:
Surface Cleaning: Remove all dust, oil, and loose material. Ensure surface is clean and dry.
Priming: For porous substrates like concrete, apply a suitable primer if needed.
Sealant Application: Use a sealant gun to apply evenly, then smooth with a spatula.
Curing: At 23°C and 50% RH, surface tack-free in 3–4 hours; full cure in 7 days.
Storage: Store at 5–35°C in dry, ventilated areas, away from frost and sunlight.
Product Documentation
MS12A Airport-Grade Silane-Modified Joint Sealant
MS12A Silane-Modified Joint Sealant | High Elastic Sealant for Airport Pavement & Concrete Expansion Joints
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Our products have undergone rigorous testing at our national testing laboratory (CABR testing center co., ltd). Renowned Fortune Global 500 firms such as China Railway Group Limited, China Communications Construction Company Limited, and Sinohydro are among our esteemed clients.
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