Engineering specific PU sealant (polyurethane sealant) customization, the core is to accurately adjust the formula, modulus, color, packaging and curing speed according to the engineering conditions, suitable for scenarios such as construction, tunnels, bridges, airports, water conservancy, etc. that require extremely high sealing, waterproofing, weather resistance, and displacement resistance.
1、 Customized dimensions of engineering specific PU sealant core (mandatory)
- Type and curing method (basic)
Single component moisture curing (mainstream)
Features: Ready to use, solidifies when exposed to moisture in the air, easy to construct
Applicable: Building expansion joints, curtain walls, doors and windows, tunnels, prefabricated components
Representative: Puseida 8260/8261B, VS 8800 Same System Engineering PU
Two component reaction curing (heavy-duty engineering)
Features: A/B mixed curing, high strength, water pressure resistance, and extremely strong weather resistance
Applicable: Bridge expansion joints, airport runways, water conservancy dams, sewage tanks
Advantages: Thick layer solidification, no collapse, strong displacement ability - Modulus customization (most importantly, determining the elasticity and adaptability)
Low modulus (high elasticity): elongation rate of 400% -800%, suitable for large displacement joints (± 25%), high-rise expansion joints, and dynamic joints
Medium modulus: Balancing elasticity and strength, commonly used for building, curtain wall, and exterior wall joint filling
High modulus (water pressure resistance): high strength, deformation resistance, water pressure resistance, suitable for tunnels, basements, and water pool back surfaces - Performance parameter customization (according to working conditions)
Hardness: Shore A 25-65 (soft high elasticity → hard high strength)
Temperature resistance: -40 ℃~80 ℃ (modified for cold/heat resistance)
Weather resistant/UV resistant: Choose anti yellowing and UV resistant formulas for outdoor engineering
Adhesive properties: for concrete, stone, metal, glass PVC、 Aluminum specific primer/formula
Environmental protection: low VOC, solvent-free, odorless, in compliance with GB 18583
Surface drying/curing speed: fast drying (30 minutes surface drying) → slow drying (3 hours surface drying), adapted to the construction rhythm - Customization of appearance and packaging
Color: black, white, gray (standard); Customized beige, light gray, brown, red, etc
Packaging: 310ml aluminum tube, 600ml soft pack, drum (5/10/20L), two-component iron drum
Identification: Engineering specific logo, batch number, construction instructions, anti-counterfeiting label
2、 Customized solutions for typical engineering scenarios
Architecture/Curtain Wall: Low modulus, black/gray, single component, weather resistant, non sagging, strong thixotropy
Tunnel/subway: high modulus, water pressure resistance, mold resistance, alkali resistance, single/two-component
Bridge/airport runway: two-component, high elasticity, wear-resistant, oil resistant, displacement resistant
Water conservancy/water tank: water-resistant, long-term immersion resistant, low modulus, high elongation
Prefabricated components/assembly type: medium modulus, high adhesion, fast curing, paintable
3、 Customized process (standard 5-step)
Requirement confirmation: operating conditions (temperature/humidity/water pressure), substrate, displacement, color, modulus, dosage, duration
Formula design: Engineers adjust prepolymers, fillers, and additives to provide performance indicators
Sample making: 3-7 days for sample production, including tensile, adhesive, weather resistance, and displacement testing
Sample confirmation: customer testing/on-site trial, fine-tuning formula
Batch production: 7-15 days delivery; Small batch (≥ 500 pieces), large batch (≥ 5000 pieces)