Found this product which claims to be self adhering and self sealing tape
for repair of hoses.  Sounds like a solution for on the road leaks and is
even good for leaks on hoses in the engine bay....

--
Rob
NYC/Long Beach, NY
88 Wolfsburg, Silver

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http://www.eastwoodco.com/shopping/product/detailmain.jsp?itemID=15090&itemT
ype=PRODUCT&iMainCat=608&iSubCat=616&iProductID=15090

Self-Fusing Silicone Rubber Tape

Form fits around any configuration, Self sticking with no adhesive. Fuses to
itself in 24 hours. Temp range -60F to 500F with no stickiness or peeling.
Unaffected by fuel & oils and provides an air and watertight seal. Great for
emergency hose repair, wiring harness work, electrical connections and tool
grips. A perfect tape solution. Includes 3 rolls. Made in USA. Each roll
contains approximately 11 feet of tape. Tape is approximately 1" wide.

    Item#        Product        Qty        Price

    11787        Tommy Tape Three Roll Kit
    $15.99