An old tile overlay waterproofing and protection system for stable, prepared tile surfaces where full tile removal is not planned. It helps fill grooved joints and local weak points, improve bonding over dense tile, and create a continuous exposed polyaspartic overlay for waterproofing, surface protection and decorative renewal.
Grooved joint filling + adhesion interface coat + exposed surface overlay protection
Grooved tile joint filling, gap treatment and local repair before overlay work
Adhesion interface coat for prepared dense tile surfaces before the overlay layer
Exposed polyaspartic surface overlay for waterproofing, protection and decorative renewal
The system separates joint repair, adhesion interface and exposed surface overlay protection, helping reduce joint leakage paths, peeling risk and surface aging on prepared old tile renovation projects.
BW6-9527 blended with quartz sand is used after joint opening and cleaning to fill grooved tile joints, gaps, small voids and local repair zones. It helps reduce discontinuity and water-entry paths that can remain between old tiles before the adhesion interface and surface overlay layers are applied.
BW8007 is applied over the cleaned, dry and prepared tile surface to create the adhesion interface before BW0-8032 is applied. It helps reduce peeling risk caused by dense ceramic tile, low surface absorption and difficult bonding conditions when surface preparation and compatibility are confirmed.
BW0-8032 forms the exposed polyaspartic surface overlay over the prepared old tile system. It helps improve waterproofing continuity, surface protection, weathering resistance, wear resistance, color finish and decorative renewal after renovation.
Old tile overlay failure often starts from small weak points: loose or hollow tiles, open joints, gaps, dense glazed surfaces, dust, oil, cleaning residue, weak edges, cracked tiles, drain edges, wall-floor corners, door thresholds and exposed surface wear. The BW6-9527 + BW8007 + BW0-8032 system helps reduce these risks through a controlled route from tile stability review to joint filling, adhesion interface and continuous surface overlay protection.
Check whether the existing tile layer is stable before coating work begins. Remove or repair loose, hollow, severely cracked or unstable tiles, then clean the surface and remove dust, oil, cleaning residue, loose material and weak edges. Open or groove tile joints where needed so the joint filling layer can be applied to a sound prepared surface.
Blend BW6-9527 with quartz sand for grooved tile joint filling, gap treatment and local repair. This step helps reduce water-entry paths through open joints, cracked joints, small voids and local weak points before the adhesion interface coat is applied.
Apply BW8007 over the prepared old tile surface and repaired joint areas to create the adhesion interface before BW0-8032 overlay application. This step helps improve bonding over dense tile surfaces and reduces peeling risk when surface preparation, dryness and compatibility are properly controlled.
Apply BW0-8032 to form the exposed polyaspartic overlay surface over the prepared tile system. This layer helps create a continuous waterproofing and protective finish while improving appearance, surface wear resistance, weathering resistance and decorative renewal after renovation.
System-relevant values for old tile overlay renovation: joint filling, adhesion interface, waterproof overlay flexibility and exposed surface durability.
| Item | Test standard / reference | Result |
|---|---|---|
| Solid content | Product Information | ≥98% |
| Impact resistance | Typical Physical Test Performance | 50 kg·cm |
| Concrete adhesion | Typical Physical Test Performance | ≥3.0 MPa, substrate broken |
| Acid / salt resistance | Corrosion and Temperature Resistance | 30% H2SO4, 168 h; salt resistance 360 h |
| Item | Test standard / reference | Result |
|---|---|---|
| Density g/cm³ | GB/T 6750-2007 | 1.02 |
| Solid content | Product Information | ≥65% |
| Impact resistance | GB / T 23446-2009 | 60 kg·cm |
| Viscosity (cps) @ 25°C | Product Information | 210 |
| Adhesion reference | Dry concrete surface | 2.9 MPa |
| Temperature variation | GB/9278-1988 | -40 to +150°C, 24 h: normal |
| Salt resistance | Chemical Resistance | 50 g/L, 30 d: no corrosion, blistering or peeling |
| Alkali resistance | Chemical Resistance | 50% NaOH, 30 d: no corrosion, blistering or peeling |
| Compatibility review | Old tile interface | Dense tile adhesion should be confirmed by preparation and sample-area review |
| Item | Test standard / reference | Result |
|---|---|---|
| Elongation | ASTM D-412 | 368% |
| Tensile strength | ASTM D-412 | 17 MPa |
| Impact strength | GB / T 1732 | 50 kg·cm |
| Abrasion resistance | HG / T 3831-2006 | 5 mg |
| Solid content | Product Information | 98% / 97% |
| Accelerated aging | GB / T 14522-1993, 2000 h | Loss of light <1; chalking <1 |
| Salt spray resistance | Chemical Resistance | 1500 h, no corrosion, blistering or peeling |
| Water resistance | Chemical Resistance | 48 h, no bubbles, wrinkles, color change or peeling |
| Acid / alkali / salt resistance | Chemical Resistance | 10% acid, 5% NaOH and 30 g/L salt, 240 h |
The above values are selected from the current product-detail Product Information, Physical Properties and Chemical Resistance tables. Final film thickness and suitability should be confirmed according to substrate condition, service exposure, detail design, project specification and the latest approved technical data sheet. Dense tile adhesion should be confirmed by surface preparation, compatibility check and sample area.
Before handover, key inspection should focus on tile stability, joint filling quality, BW8007 adhesion coverage and BW0-8032 overlay continuity.
Confirm the existing tile surface before product application starts.
Review joint filling and adhesion interface before the overlay layer is applied.
Review the exposed BW0-8032 overlay before service.
Use these checks to judge whether the BW6-9527 + BW8007 + BW0-8032 system is suitable before final specification.
For existing tile surfaces that are stable enough for cleaning, joint opening, local repair, adhesion interface and exposed overlay protection.
For projects with visible tile joints, gaps, small voids or local repaired areas where BW6-9527 + quartz sand can be used for joint filling and local repair before overlay work. Review joint width, groove depth and repair scope before confirming suitability.
For dense ceramic tile surfaces where adhesion interface, surface preparation, dryness and compatibility must be reviewed before BW0-8032 overlay application. Review dense tile, primer interface and compatibility before confirming suitability.
For old tile surfaces that need a continuous exposed protective finish with waterproofing, surface protection, color renewal and maintainable appearance. Review color finish, exposure and maintenance before confirming suitability.
Do not apply this system directly over loose, hollow, severely cracked, unstable, contaminated or wet tile surfaces. Cleaning, sanding, joint opening and grooving are preparation steps, not product coating layers. Final system selection should confirm tile stability, joint geometry, moisture condition, surface texture, adhesion compatibility, color or finish target and service exposure before ordering.
Common questions about using BW6-9527, BW8007 and BW0-8032 for old tile overlay waterproofing, protection and decorative renewal.
