胶水与粘合剂指南 (Adhesive & Sealant Guide)
1. Overview of Adhesive Types Used in Renovation
| Adhesive Type | Chinese Name | Primary Use | Base Material | Cure Mechanism |
|---|---|---|---|---|
| Glass Glue / Silicone Sealant | 玻璃胶 | Sealing windows, bathrooms, kitchens | Silicone | Moisture cure |
| Structural Adhesive | 结构胶 | Load-bearing bonds,幕墙 (curtain wall) | Epoxy / Polyurethane / MS Polymer | Chemical cure |
| Tile Adhesive | 瓷砖胶/瓷砖粘结剂 | Bonding tiles to walls/floors | Cement + polymer modified | Water evaporation + hydration |
| Floor Adhesive | 地板胶 | Wood flooring, LVT, rubber flooring | Polyurethane / Acrylic | Solvent evaporation / moisture cure |
| Wood Glue | 木工胶/白乳胶 | Wood joints, cabinetry, trim | PVA (Polyvinyl Acetate) | Water evaporation |
| Polyurethane Foam | 发泡胶/PU发泡剂 | Gap filling, insulation, window sealing | Polyurethane | Moisture cure (expanding) |
| Contact Adhesive | 万能胶 | Laminate, veneer, rubber flooring | Neoprene / Polychloroprene | Solvent evaporation |
| Epoxy Adhesive | 环氧树脂胶 | Metal, stone, structural repair | Two-part epoxy | Chemical reaction (A+B mix) |
| MS Polymer Sealant | MS改性硅烷胶 | General sealing, replacing silicone | Modified silane | Moisture cure |
| Tile Grout (Epoxy) | 环氧美缝剂 | Tile joint filling (bathroom, kitchen) | Epoxy resin | Chemical cure |
2. Glass Glue / Silicone Sealant (玻璃胶)
Types
| Type | Characteristics | Best For | Avoid |
|---|---|---|---|
| Acidic (酸性) | Strong smell (vinegar), fast cure, strong bond | Glass, mirrors, smooth non-porous surfaces | Marble, cement, metal (corrosive), mirrors with silver backing |
| Neutral (中性) | No odor, slower cure, safe for most materials | General sealing, bathroom, kitchen, stone, metal | None (universal use) |
| Anti-mold (防霉型) | Contains fungicide, neutral or acidic | Bathroom, kitchen, areas with persistent moisture | Food contact surfaces |
| Weather-resistant (耐候型) | UV stable, wide temperature range | Exterior windows, facade sealing | Interior decorative work |
Application Checklist
- [ ] Clean surfaces thoroughly — remove dust, oil, old sealant residue
- [ ] Use masking tape on both sides for clean bead lines
- [ ] Apply at 5–40°C; cold temperatures slow curing
- [ ] Tool the bead within 5 minutes of application
- [ ] Remove masking tape immediately after tooling
- [ ] Allow 24 hours full cure before exposing to water
- [ ] Do NOT paint over silicone (use MS polymer if painting is needed)
Common Brands
| Brand | Product Line | Notes |
|---|---|---|
| GE (Momentive) | Silicone I / II | Industry standard, reliable |
| Dow (Dow Corning) | 791, 795 | Excellent for construction |
| Wacker (瓦克) | GM, GN | German quality, good anti-mold |
| Sika (西卡) | Sikasil | Strong in structural applications |
| Bai Yun (白云) | Chinese domestic | Cost-effective, good availability |
3. Structural Adhesive (结构胶)
Applications in Renovation
- Bonding stone countertops to cabinets
- Curtain wall panel installation
- Stair nosing and tread bonding
- Heavy mirror mounting (frameless)
- Metal-to-concrete connections
- Glass railing installation
Types by Chemistry
| Chemistry | Strength | Cure Time | Temperature Range | Best For |
|---|---|---|---|---|
| Epoxy | Very high | 5 min – 24 hrs (depends on formula) | -40 to 120°C | Structural stone, metal bonding |
| Polyurethane (PU) | High | 4–24 hrs | -40 to 90°C | Flexible bonds, dissimilar materials |
| MS Polymer | High | 24 hrs (surface cure 30 min) | -40 to 100°C | All-purpose structural, paintable |
| Silicone (structural grade) | Moderate–High | 24 hrs | -50 to 200°C | Glass curtain walls, high-temp areas |
Selection Guide
| Scenario | Recommended Type | Key Property |
|---|---|---|
| Stone countertop bonding | Epoxy (two-part) | High shear strength, gap filling |
| Glass railing to floor | Structural silicone | UV stable, transparent |
| Metal bracket to concrete | PU structural adhesive | Flexibility, vibration resistance |
| Frameless mirror mounting | MS polymer | Safe for mirror backing, strong |
| Outdoor structural glazing | Structural silicone (ASTM C1184) | Weather resistance |
4. Tile Adhesive (瓷砖胶 / 瓷砖粘结剂)
Classification by Performance Grade
| Grade | Bond Strength | Tile Size Supported | Wall or Floor | Notes |
|---|---|---|---|---|
| C0 (Basic) | ≥ 0.5 MPa | Up to 200 x 200mm | Floor only | Basic cement-based, budget |
| C1 (Standard) | ≥ 0.5 MPa (improved) | Up to 400 x 400mm | Wall and floor | Most common for residential |
| C2 (Enhanced) | ≥ 1.0 MPa | Large format (600 x 1200mm+) | Wall and floor | Polymer-modified, for heavy tiles |
| S1 (Flexible) | C2 + ≥ 2.5mm deformation | Large format on flexible substrates | Wall and floor | For underfloor heating, wood substrates |
| S2 (Highly Flexible) | C2 + ≥ 5mm deformation | Very large format, exterior | All | For extreme movement areas |
C1 vs Traditional Cement Mortar
| Feature | Tile Adhesive (C1) | Cement Mortar |
|---|---|---|
| Bond Strength | 0.5+ MPa | 0.2–0.3 MPa |
| Application Thickness | 3–8mm (thin-bed) | 15–30mm (thick-bed) |
| Material Consumption | 4–6 kg/m² | 15–25 kg/m² |
| Slump Resistance | Excellent (no sagging on walls) | Poor (tiles slide on walls) |
| Water Retention | High (no pre-soaking tiles needed) | Low (tiles must be soaked) |
| Workability | Mix with water only | Requires sand mixing, skill-dependent |
Application Checklist
- [ ] Select grade based on tile size and location (wall vs floor)
- [ ] Substrate must be solid, clean, and level (±3mm / 2m)
- [ ] Mix to a smooth, lump-free paste; let rest 5 minutes, remix
- [ ] Apply with correct notch trowel size:
- Small tiles (up to 200mm): 6mm notch
- Medium tiles (200–400mm): 8mm notch
- Large tiles (400mm+): 10mm notch
- [ ] Use double-buttering (apply adhesive to both substrate and tile back) for tiles larger than 400mm
- [ ] Press firmly and shift slightly to collapse ridges
- [ ] Open time: install within 20 minutes of spreading adhesive
- [ ] Do not add extra cement or sand to pre-mixed tile adhesive
Brand Recommendations
| Brand | Notes |
|---|---|
| Mapei (马贝) | Full range C0–S2, excellent quality |
| Davco (德高) | Popular in China, good C1/C2 range |
| Sika (西卡) | SikaCeram line, reliable |
| Oriental Yuhong (东方雨虹) | Domestic leader, cost-effective |
| Bostik (波士胶) | French brand, strong large-format line |
5. Floor Adhesive (地板胶)
Types by Flooring Material
| Flooring Type | Recommended Adhesive | Key Properties |
|---|---|---|
| Solid wood | PU adhesive or elastic MS polymer | Flexible, moisture-tolerant |
| Engineered wood | Solvent-free acrylic or silane-based | Low VOC, fast set |
| LVT / SPC | Pressure-sensitive acrylic | Re-positionable, water-resistant |
| Rubber flooring | Contact adhesive or water-based dispersion | Strong bond, flexible |
| Carpet | Pressure-sensitive or hot-melt | Releasable (for carpet tiles) |
VOC Considerations
| Adhesive Type | Typical VOC Level | Ventilation Required |
|---|---|---|
| Solvent-based contact adhesive | High (200–600 g/L) | Yes, 48+ hours |
| Water-based acrylic | Low (< 50 g/L) | Minimal |
| MS Polymer | Very Low (< 10 g/L) | Minimal |
| Solvent-free PU | Low (< 30 g/L) | 24 hours |
Rule: Always choose water-based or solvent-free floor adhesives for occupied residential spaces. Verify VOC compliance with GB 18583 (Chinese indoor adhesive standard) or equivalent.
6. Wood Glue / PVA Adhesive (木工胶)
Types
| Type | Color When Dry | Water Resistance | Set Time | Use |
|---|---|---|---|---|
| White PVA (白乳胶) | Transparent | None (interior only) | 30 min clamp, 24 hr cure | Indoor furniture, cabinetry |
| Yellow PVA (黄胶) | Amber | Moderate (D2) | 30 min clamp | Interior wood, trim |
| Cross-linked PVA (D3/D4) | Transparent/amber | High (exterior grade) | 1–2 hr clamp | Outdoor furniture, boats |
| Urea-Formaldehyde (脲醛胶) | Hard, brittle | Good | Fast (with catalyst) | Plywood, particleboard manufacturing |
| EVA Hot Melt (热熔胶) | Transparent | None | Instant | Edge banding, quick assembly |
PVA Application Tips
- Apply thin, even coat to ONE surface only
- Clamp for minimum 30 minutes at 20°C
- Full cure takes 24 hours before sanding or finishing
- Clean excess with damp cloth before drying
- Shelf life: 12 months unopened; discard if lumpy or separated
VOC Note on Wood Glues
- Standard PVA: Very low VOC, safe for indoor use
- Urea-formaldehyde: Releases formaldehyde; avoid in residential applications where possible; use E0/E1 graded products
- Polyurethane wood glue: Moderate VOC during cure, inert after cure
7. Polyurethane Foam Sealant (发泡胶 / PU发泡剂)
Types
| Type | Expansion | Best For |
|---|---|---|
| High-expansion | Expands 2–3x volume | Large gaps (> 20mm), void filling |
| Low-expansion | Expands 1.2–1.5x | Window/door frames (prevents bowing) |
| Gun-grade | Precise application, controlled expansion | Professional work, narrow gaps |
| Straw-grade | DIY use, disposable | One-off small jobs |
Application Checklist
- [ ] Choose low-expansion foam for window/door frames to avoid distortion
- [ ] Fill gap only 1/3 to 1/2 full (foam expands)
- [ ] Dampen substrate slightly for better adhesion
- [ ] Trim excess after full cure (typically 2–4 hours)
- [ ] Cut surface must be sealed with silicone or paint (UV degrades foam)
- [ ] Never use in gaps narrower than 5mm or wider than 80mm without multiple passes
8. VOC and Health Considerations
VOC Levels by Adhesive Category
| Category | VOC Range | Indoor Air Quality Impact | Recommendations |
|---|---|---|---|
| Silicone sealant | Very low (post-cure) | Minimal after 24 hrs | Choose neutral, anti-mold for bathrooms |
| Epoxy | Low–Moderate | Moderate during mixing/cure | Ventilate during use; inert after cure |
| Solvent-based contact adhesive | High | Significant for 48–72 hrs | Avoid in residential; use water-based alternative |
| Water-based PVA/acetate | Very low | Negligible | Safe for all indoor use |
| PU foam (uncured) | Moderate | Moderate for 4–8 hrs | Ventilate; inert after trim |
| Tile adhesive (cement-based) | None | None | Dust hazard during mixing — wear mask |
| MS Polymer | Very low | Negligible | Best all-around low-VOC option |
Key Standards
- GB 18583-2008: Chinese national standard for indoor decorative adhesives (VOC limits)
- GREENGUARD Gold: Low emission certification for indoor air quality
- EC1 Plus (EMICODE): European standard, lowest emission class
- A+ (French VOC label): Highest indoor air quality rating
Practical VOC Reduction Tips
- Choose products labeled E0, GREENGUARD, or EC1 Plus
- Ventilate continuously during and after adhesive application
- Allow 72-hour cure period before occupying renovated space
- Use air purifiers with activated carbon during curing
- Avoid mixing different adhesive brands on the same job
- Store adhesives sealed and in cool conditions to prevent premature off-gassing
9. Quick Selection Matrix
| Task | Best Adhesive | Alternative | Notes |
|---|---|---|---|
| Seal bathroom sink to counter | Neutral anti-mold silicone | MS polymer | Anti-mold grade essential |
| Bond tile to wall | C1 or C2 tile adhesive | — | Use notch trowel |
| Fix wood trim | White PVA (D2) | Construction adhesive | Clamp 30 min |
| Mount frameless mirror | MS polymer | Structural silicone | Must be mirror-safe |
| Seal window perimeter | Low-expansion PU foam | — | Trim and seal surface |
| Bond stone countertop | Two-part epoxy | — | Structural strength required |
| Edge banding | EVA hot melt | Contact adhesive | Use edge banding machine |
| Fill gap between cabinet and wall | Neutral silicone | MS polymer | Paintable if MS |
| Install LVT flooring | Pressure-sensitive acrylic | — | Follow manufacturer TDS |
| Outdoor wood repair | D3/D4 PVA or PU wood glue | Epoxy | Must be waterproof |