Insta Holding Tank Patch. Bonds To Polyethylene Holding Tanks. Instantly repair holding tanks with this simple to use peel and stick patch. Formulated to bond with polyethylene tanks, ABS, PVC and similar plastics. No special tools needed. Creates a long lasting repair. Patch size 4 inch x 7 inch. Instructions for best results: Start with a smooth dry surface. Wipe clean with acetone. Apply in temperatures above 55 degree F. Use a heat gun if necessary to warm surface and patch. Remove paper liner and apply patch to cracked area . Firmly apply patch and roll until texture is smooth.