Heavy Duty & Super Strong Tarpaulin Building Materials Roof Vehicles Cover Sheet. These silver (110 gsm) and green (150gsm) tarpaulin sheets are heavy duty covers. They offer an effective covering for your usage. As they are heavy duty, rot proof, mildew proof, shrink proof and very easy to handle covers.They can be used for a wide range of uses and are ideal for Gardening, DIY, camping, fishing, hunting, sledging, paint-balling. Playgrounds, boat covering or anything that needs protection. They include eyelets to make tying down or hanging up quick and easy. They are recommended for temporary usage.