Waterproof insulating sealant effectively prevents leaks. This is a revolutionary water and rubber based formula that penetrates seams, cracks and leaks and seals any cracked surface. At the same time, it forms a waterproof and protective coating on the adjacent area. Excellent quality Made of high-quality materials, friendly to human body and environment, non-toxic. Tested and approved, it has a longer validity period. It will not harm the body or surfaces. Saves Money Helps save time, money and energy as it guarantees long-term protection after use. Can be used to penetrate cracks, windowsills, bathrooms, walls, and exterior walls. EFFECTIVE REPAIR All you have to do is "brush" the glue onto the desired surface and you're done! It instantly and effectively seals walls, ceilings, roofs, window sills, etc. Packaging contents: 30g/100g/300g sealant*1+brush*1