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Understanding Deck Sealing

Proper deck sealing protects your investment and extends deck life.

• Sealer Types Different options for various needs.
• Surface Preparation Essential for good results.
• Application Methods Proper techniques for best coverage.
• Maintenance Regular upkeep requirements.

Sealer Technology

• Chemical Properties Solids content: 15-40%. Penetration depth: 2-6mm. Molecular weight: 100-1000 Da. Surface tension: 20-30 dynes/cm. pH stability: 6-9. Flash point: >100°F.
• Performance Metrics Water repellency: >90%. Vapor transmission: 10-12 perms. UV resistance: 95%. Chemical resistance: pH 3-12. Abrasion resistance: CS-17, <0.1g/1000 cycles.
• Durability Factors Service life: 2-5 years. Weather resistance: 2000 hrs QUV-B. Salt spray: 1000 hrs. Freeze-thaw cycles: 100 min. Impact resistance: 160 in·lb. Hardness: 6H.

Application Science

• Surface Preparation Moisture content: <15%. Surface profile: 60-80 grit. pH range: 6-8. Chloride level: <3 ppm. Temperature: 50-90°F. Cleanliness: SSPC-SP1 min.
• Environmental Controls Relative humidity: <85%. Dew point spread: >5°F. Wind speed: <15 mph. UV exposure: <75 W/m². Precipitation probability: <10%. Substrate temp: >50°F.
• Application Parameters Coverage rate: 150-400 ft²/gal. Wet film: 4-8 mils. Dry film: 1-3 mils. Recoat window: 2-4 hrs. Full cure: 24-72 hrs. VOC content: <250 g/L.

Quality Assurance

• Testing Protocols Water absorption: ASTM D570. Adhesion: ASTM D3359. Weathering: ASTM G154. Chemical resistance: ASTM D1308. Hardness: ASTM D3363.
• Performance Validation Beading angle: >90°. Moisture exclusion: >85%. Color retention: ΔE <2.0. Gloss retention: >80%. Stain resistance: Class 1. Scratch resistance: >7H.
• Maintenance Schedule Inspection interval: 6 months. Cleaning frequency: 3-6 months. Recoat cycle: 2-3 years. Repair threshold: 15% degradation. Documentation: ASTM D5161.

Cost Factors