Neutral silicone sealant for kitchen and bathroom waterproofing
When choosing sealant for kitchen and bathroom, the core is one sentence: only buy neutral, grade 0 anti mold, alcohol cured silicone sealant, do not use acidic or inferior cheap products. Below, we will explain clearly from four aspects: how to choose, brand recommendation, construction points, and common misconceptions.
1、 First understand: Why do kitchens and bathrooms have to use “neutral silicone anti mold glue”
- Neutral vs Acidic (Neutral is mandatory)
Acidic glue: It has a sour vinegar taste and corrodes metal/stone. It cannot be used in kitchens and bathrooms (it will rust and turn black).
Neutral adhesive: No pungent odor, non corrosive to metal/ceramic tiles/quartz stones, suitable for kitchen and bathroom use.
Neutral is further divided into:
Alcohol type (recommended): Cures into alcohol, environmentally friendly, non corrosive, and has minimal odor.
Ketoxime type: slightly strong odor, not recommended for household use. - Anti mold level: Must be level 0 (highest)
Grade 0 anti mold: GB/T 1741 standard, 28 days without mold, essential for humid environments in kitchens and bathrooms.
Level 1 and below: prone to blackening and mold growth, do not buy. - Core performance requirements (visible on the packaging)
Grade 0 anti mold (JC/T 885-2016)
Neutral curing, alcohol type
Temperature resistance -40 ℃~150 ℃ (can also be used on the stove)
Tensile strength ≥ 1.0MPa, displacement capacity ± 25% (crack resistance)
Environmental Protection: GB 18583, French A+, no benzene or formaldehyde
2、 Brand recommendation (2026 kitchen and bathroom with closed eyes) - First line (durable for 10 years+, strong mold resistance)
Wacker Wacker DA Plus (Germany)
15 times grade 0 anti mold, alcohol type, food contact grade
Taoxi DOWSIL Kitchen and Bathroom Special (formerly known as Corning)
Grade 0 anti mold, neutral, strong adhesive strength
Sika C (Switzerland)
Waterproof, stain resistant, mold resistant and stable - Domestic high cost-effectiveness (5-8 years, sufficient)
Dongfang Yuhong WS101
Grade 0 anti mold, benzene free and formaldehyde free, kitchen and bathroom specific
Silicon Treasure 602/603
Mold and stain resistant, suitable for toilets/sinks
Silicon Treasure 602 Glass Adhesive - Price reference (300ml/piece)
First line: 60-120 yuan
Domestic: 25-50 yuan
Less than 15 yuan: basically low-quality acidic adhesive, don’t buy it
3、 Key points of construction (determine how many years it can be used) - Grassroots treatment (most critical)
The gaps must be clean, dry, oil-free, and dust-free.
The old glue must be completely removed, otherwise the new glue will come off. - Glue application steps
Stick decorative paper on both sides of the gap (tear off after gluing, with neat edges).
Cut the rubber nozzle at a 45 ° angle, with a width slightly smaller than the seam width.
Apply glue at a constant speed, filling the gaps and slightly above the surface.
Dip your fingers in detergent water and smooth it out all at once (do not rub repeatedly).
Tear off the textured paper within 10 minutes, dry within 24 hours, and fully cure within 72 hours. - Construction environment
Temperature 5-35 ℃, ventilated, no visible water.
Do not touch water before curing (at least 24 hours).