Maybe...but I thought HF 44 was specifically marketed for use on double shotguns...perhaps no one called them on it...I've repaired loose ribs on a Superposed, 2 L C Smiths, a Parker, a Baker, re-attached the fore end lugs and replaced European swivel bases to the under rib...and more with the HF 44...and now you tell me...I just accepted Brownells description as having the lowest possible critical temp..bought it...tried it...and it worked...so I stuck with it