Heater box to firewall sealer?

[asphaltburner]

Yo! Guys!
The only problem with the old butyl stuff is that heat will make it run, and it's a REAL PITA to clean away if you need to do it again at some other point. The older trucks were done with a product just like plumber's putty. And it's ridiculously cheap,...I bought a 14 oz tub at ACE Hardware for $1.99, did two sinks, my Camaro's box, and my P/U's box, and still have about 10 oz left over (for more plumbing applications!). Remember it for the future. Also looks identical to OEM (on the '73's through '78s for sure,...newer trucks I cannot attest to), yellowish-off white. Just like what I scraped off of my '76 Camaro, '73 flatbed, and '78 P/U. And cleans off your fingers and firewall with just a wipe or scrape. Rolls into long strips for sealing easily between your flattened hands. Waterproof and never dries, remains flexible. Todd.