Patch Sunbrella Canvas With Tear Aid Type A Video demonstrates how to use Tear-Aid to patch a rip in Sunbrella without sewing. Tear-Aid is a durable, flexible, airtight, watertight, puncture-resistant, industrial-strength patch that protects against abrasion, moisture, saltwater, UV sunlight and extreme temperatures. Use these clear adhesive backed patches to repair holes and tears in canvas, nylon, rubber, and plastic.