TC, Protective Sealant Transparent water proofing chemical. PTC is weather proof sealant chemical. PTC is light milky liquid, which turns transparent after curing. PTC enters into fine pores of surface and seals them. It makes a thin transparent film with 3 coats and protects the surface from weather attacks, 100% water proofing transparent chemical coat, No change in appearance of the original surface, Protects and increases the life of the treated surface, High penetration due to low surface tension.