3M 08300 Ultrapro Tan Autobody Sealant Cartridge - 1/10 Gallon 3M Ultrapro Autobody Sealant Heavy bodied seam sealer; Quick skinning, fast curing, flexible sealer Can be used wherever heavy bodied seam sealers are needed. High solids and low shrinkaged Part No. MMM 8300 QTY.1 TU.