Choosing the right waterproof membrane repair adhesive depends on the scenario, substrate, and extent of damage. Here's a list of practical options for different scenarios:
Choosing by Scenario and Type of Damage
Large-area or structural leaks such as roofs and exterior walls: Choose polyurethane or MS-modified silicone waterproof adhesives. These are flexible, weather-resistant, and can adapt to thermal expansion and contraction.
Bathroom, kitchen tile grout, or pipe roots: Choose neutral, mildew-resistant silicone adhesives. These have a high mildew resistance rating and are suitable for humid environments.
Small-area cracks and holes: Choose acrylic or polyurethane quick-drying sealants. They are easy to apply.
Repairing special materials such as metal and plastic: Choose specialized repair adhesives, such as 3M™ 300LSE series tape for automotive door waterproof membranes.
Choosing by Product Characteristics
Adhesive strength: Must withstand at least 5 kg/cm² tensile force.
Water Resistance: After complete immersion for 72 hours, the adhesion retention rate should be ≥90%.
Curing Time: Surface dryness ≤30 minutes is preferred [for easy adjustment during construction].
Environmental Protection: Prioritize low-odor, non-toxic products, especially for indoor use.
Selection by Substrate
Concrete, Brick Walls: Choose polyurethane-based or MS-modified silicone waterproof adhesives.
Metal, Plastic: Choose specialized metal repair adhesives or plastic adhesives, such as Henkel Loctite EA E60NC potting compound.
Tile, Ceramic: Choose neutral anti-mildew silicone adhesives or specialized tile adhesives.