FWIW;
Just called Brownells, Inc. to confirm death of Acraglas Gel. Tech says it ain't so. There was a two sqeeze tube version discontinued due to leakage. The glue gun variation is available as Jim said. Brownells still has a two gun kit, 16 oz. Shop kit, and bulk supplies available for your needs. Looked it up on line and the product is still listed for purchase. I usually buy the bulk and mix it by hand. So far so good. I do prefer the Acraglas liquid, mixed with fiberglass, for bedding and crack repair. The exception is for cracks deep down and then I thin the mixture with acraglas solvent and use air to move it down the crack for a good hold. Binding is with surgical tubing.
