Waterborne Tile Recoloring Solution

Industry pain points

The challenges of traditional methods — old house renovation

High Labor Costs

Demolition and tile removal incur expensive labor fees, resulting in persistently high renovation costs.

Dust Everywhere

Demolition work generates heavy dust, which severely impairs living environment.

Long construction period

Demolition – Relaying – Curing, the entire cycle takes several weeks.

Total home clearance

Moving furniture, temporary relocation – major disruption to daily life.

SNYTO Next-Generation Water-based Tile Recoloring Solution

No tile removal, no need to empty the entire house. Renew all wall and floor tiles in a short time. Low cost, highly eco-friendly, and strong weather resistance.

One-stop solution to yellowing, aging, and outdated tile styles – easily upgrade the texture of your old living space.

Solution Overview

No demolition, no tile removal. One coat, a brand-new look. Apply and use immediately.

Option A • Two-Component

KW 8307/8306 + SN 7560

Silane coupling agent (added later)

Two-component system, crosslinker added later. The resin and crosslinker are stored separately and mixed in proportion before application. This achieves higher crosslinking density and superior overall performance. It is suitable for engineering projects with higher requirements for water resistance, weather resistance, and abrasion resistance.

Option B • One-Component

KW 8307/8306 + SN 7520

Silane coupling agent (added first)

One-component system with crosslinker pre-incorporated in the formulation. SN 7520 delivers excellent hydrolytic stability and can be added directly during paint preparation for easier application. Suitable for renovation projects prioritizing construction efficiency.

Core Principle: One end of the silane coupling agent molecule forms a chemical bond with the silanol groups on the tile surface, while the other end reacts with the organic groups of the resin – this is the key to ensuring that the renovation and recoloring layer does not peel off.

Technical Principle

Silane Coupling Agent—Chemical Bonding, The Key to Non-Peeling Performance

Mechanism of Silane Coupling Agent

Waterborne Acrylic Resin (KW 8307 / KW 8306)

% Chemical Bonding (Covalent Bond)

Silane Coupling Agent (SN 7560 / SN 7520)

% Chemical Bonding (Si-O-Si)

Tile Surface (Containing Silanol Groups Si-OH)

One end of the molecule bonds to the tile, while the other end reacts with the resin, forming a strong interfacial layer that ensures the recoloring coating remains durable and does not peel off.

Formulation System

Tile Recoloring Topcoat — Test Formulation

Item No.	Raw Material	Description	KW 8307 (%)	KW 8306 (%)	Operating Instructions
1	KW 8307 / KW 8306	Waterborne acrylic resin / Kehuai	50	50	Medium-high speed dispersion for 20–30 min Check for craters
2	Deionized Water	—	5	5
3	DMEA	PH Regulator	0.1	0.1
4	SN-6792	Defoamer/SNYTO	0.4	0.4
5	SN 9722	Thickener/SNYTO	0.2	0.2
6	SN 9755	Thickener/SNYTO	0.2	0.2
7	SN-9350A 6%	Anti-settling agent/SNYTO	2	2
8	Titanium Dioxide 70%	Self-made	28	28
9	Deionized Water	—	8.0	8.0	Medium speed dispersion for 10–15 min
10	DPnB + DPM	Film-forming aid	5	5
11	SN-3781	Leveling agent /SNYTO	0.2	0.2
12	SN-4741	Wetting agent/SNYTO	0.4	0.4
13	SN 9709 50%	Thickener/SNYTO	0.5	0.5
—	Total		100	100

Formulation Key Points

• Resin content: 50%; two formulations available simultaneously

• Titanium white slurry: 28% (in-house prepared, containing 70% R-996 titanium dioxide)

• Film-forming aids: 2% DPnB + 3% DPM, premix with water

• Crosslinker dosage: 2% (SN7560 or SN7520)

• SN7520 can be added directly during paint preparation

• SN7560 shall be blended proportionally before application

Crosslinker Comparative Screening

Silane Coupling Agent — The key to chemical bonding and anti-delamination

Crosslinker	Type	Overnight	3d	7d
SN 7560	Silane	0-2	0	0
SN 7520	Silane	0-2	0	0
1170	Carbodiimide	2-5	5	5
1180	Carbodiimide	2-5	5	4-5
Aziridine	Aziridine	2-5	5	4-5
white	/	2-5	5	3-5

Note: Adhesion is rated from Grade 0 (best) to Grade 5 (worst). Silane-based crosslinkers (SN 7560 / SN 7520) significantly improve adhesion, while carbodiimide and aziridine are essentially ineffective.

Performance Test · Adhesion

Excellent Adhesion: Grade 0–1

Test Substrate: Glazed small ceramic tiles (unpolished/unabraded) | Test Standard: GB/T 9286-2021 | Grade 0 = best, Grade 5 = worst

KW 8306 System

Time	White	SN 7560	SN 7520	1170	Aziridine
Overnight	5	2	2	5	5
3d	5	0	0	5	5
5d	5	0	0	5	5
7d	5	0	0	5	5

KW 8307 System

Time	White	1170	Aziridine
Overnight	2	2	2
3d	5	5	5
5d	5	5	5
7d	3	5	4

Summary

• Without silane addition, KW 8307 shows slightly better adhesion than KW 8306.

• After silane incorporation (SN 7560 / SN 7520), adhesion reaches Grade 0–2 overnight.

• Both achieve Grade 0 after 3 days with marginal difference.

• Silane-based crosslinkers perform significantly better than carbodiimide and aziridine.

• Good wet adhesion is maintained after 40 days of water immersion at 40°C.

Performance Test • Adhesion

No abnormality after 40-day water immersion at 40°C plus 1-hour boiling water treatment.

Test conditions: Cure at ambient temperature for 3 d → Immerse in 40°C warm water bath for 40 d → Boil in water for 1 h

Test Item	KW 8306+7560	KW 8306+7520	KW 8307+7560	KW 8307+7520
40°C Water Immersion 40d	No blistering, no delamination	No blistering, no delamination	No blistering, no delamination	No blistering, no delamination
Boiling water immersion: 1 h	No blistering, no delamination	No blistering, no delamination	No blistering, no delamination	No blistering, no delamination
Wet Adhesion	Grade 0–1	Grade 0–1	Grade 0–1	Grade 0–1

Performance Test • Storage Stability

Excellent viscosity stability and adhesion performance

KW 8306

Initial Viscosity: 88.5 KU → 50°C × 30d after 94.6 KU

Change: +6.1 KU

Adhesion after thermal storage: Grade 0–1

Slightly higher thickening response and higher initial viscosity for the same formulation. Considerable viscosity increase after thermal storage.

KW 8307

Initial Viscosity: 83.2 KU → 50°C × 30d after 84.3 KU

Change: +1.1 KU

Adhesion after thermal storage: Grade 0–1

Relatively better viscosity stability upon thermal storage. Low viscosity increment, superior storage stability.

SN 7520 Advantages of One-Component System

Benefiting from the excellent hydrolytic stability of SN 7520, the crosslinker can be added directly during paint preparation in the one-component system. After 30 days of accelerated thermal storage at 50°C, viscosity rises only slightly, and adhesion remains Grade 0–1.

Performance Test • Other Core Properties

Hardness, weather resistance, anti-slip property and good abrasion resistance

Performance Indicators	Requirements	KW 8306+7560	KW 8307+7560	Measured Values
Pencil Hardness	Mitsubishi Pencil	Measured Values	F	F-H
Weather Resistance (QUV 800 h)	ΔE ≤ 3	1.4	1.3	GB/T 23987-2009
Dry Coefficient of Friction	> 0.5	0.72	0.71	GB/T 4100-2015
Abrasion Resistance	Measured Values	0.008	0.006	GB/T 23999-2009

In terms of other core performance properties, KW 8306 and KW 8307 are essentially comparable, and both meet the long-term requirements for daily use and outdoor environments.

Recommended Additive System

Matching additives — one-step formulation solution.

Additive Type	Recommended Grade	Performance Features
Wetting Agent	SN 4741	Excellent substrate wetting ability, non-foaming
Dispersant	SN 1790	Strong versatility, excellent viscosity reduction effect, good storage stability
Defoamer	SN 6724	Grinding defoamer, good defoaming and foam suppression, good compatibility after grinding
Defoamer	SN 6792	Combines defoaming effect with good compatibility
Leveling Agent	SN 3781	Acrylic leveling agent, excellent long-wave leveling
Anti-settling Agent	SN T9350A	Good anti-settling and anti-water-separation effect

Additive System Advantages

☑ Complete SNYTO additive package ensures excellent system compatibility.

☑ Wetting & Dispersing: SN 4741 + SN 1790 ensures uniform pigment dispersion.

☑ Defoaming System: SN 6724 (for grinding) + SN 6792 (for let-down) — dual-effect defoaming.

☑ Leveling & Anti-settling: SN 3781 + SN T9350A — smooth film surface and good storage stability.

Note: All data is sourced from laboratory standard method testing. Additive dosage can be fine-tuned according to actual formulation and construction conditions.

Application Scenarios

Widely applicable, meeting diverse needs

Balcony

Bathroom

Kitchen

Commercial renovation

www.snyto.com

Solution Advantage Summary

Excellent adhesion, water resistance, and weather resistance

Solution Performance Advantages

☑ Excellent Adhesion: Grade 0 adhesion with SN 7560 / SN 7520 added

☑ Excellent Water Resistance: No defects after 40-day immersion at 40°C + 1-hour boiling water test

☑ Excellent Storage Stability: Good storage stability with SN 7520; adhesion Grade 0–1

☑ Excellent Weather Resistance: Color difference ΔE ≤ 1.4 after 800 h QUV testing

KW-8307 — Well-rounded performance, ideal for customers with high performance requirements

KW-8306 — Comparable core properties with better cost efficiency, suitable for cost-sensitive customers