I learned Joe Allard's embouchure technique from a former student of his and this seems to give the benefit of double-lip embouchure while using single lip, so I don't have to bother with covering my upper teeth. I was able to stop covering my lower teeth too, which I had been doing. It solved a number of other problems too.
I use Polymorphus material, which becomes soft when heated in hot water, then I make an overlay on the lower and upper teeth, after a minute when it cools it hardens and becomes very durable, it turns out to be a kind of mouthguard that can be reused many times. If you didn’t succeed the first time, you can repeat the heating procedure in hot water. This is more practical for those who do not have straight teeth, since on the inside it takes the shape of the teeth, and on the outside a smooth, level area. In Russia it costs pennies. 
Thank you for your help William. I do use PTFE Thread Seal Tape. It seems to me it does stick to teeth better. It last very long and is not toxic. I follow the same process as you do: size, scissors, water, shaping. Thank you, as always for sharing your priceless experience.
Thanks you for all the videos, which are fascinating - and entertaining! Although you sort of cover this, I am struggling to reconcile your strong, repeated emphasis on not biting down and having a relaxed embouchure when using the double lip method with the apparent risk of cutting your lip/gum, which to me implies significant tooth pressure on the inside of the lip/gum.
My go to of choice for protecting my upper lip from my upper teeth is 1" wide floral tape. I have not had success with narrower versions of this product, but at 1", it is wide enough to cover both front top teeth. It then becomes a matter of user preference regarding how many times to fold it over on itself for thickness/comfort. Like the PTFE Seal tape mentioned prior it is stick and takes the shape of a player's teeth, remaining in place.
I use the EZO denture pads ... made of gauze that is saturated with paraffin. You have to cut small pieces and there is some waste. It comes in various thicknesses. Lasts for many days ... Your local drug store may not stock these, but available on-line.
Dearest Tom I have been playing clarinet for 5yrs on my own and most of my education has come from your videos. i very quickly started playing with the pops orch, the chattanooga clarinet choir here in Tennessee and some other local groups...About 8or 9 months ago i stumbled on double lip and the quality of my sound and articulation have moved me forward at an accelerated pace... i would love to be able to set up a time to consult with you privately on the subject.....( please advise on your availability and fee)....... ROY
Ok, so I can play double lip with the clarinet resting on my knee. This took a while. I can't go much above G5, and when I get tired high notes get flat, but I'm making progress. Here's what I want to know Tom. How now do I transition into no longer resting the instrument on my knee so I can play double lip embouchure standing up---or might this never happen as players like Harold Wright soloed while sitting down. Thanks.
Gervase wasn’t a double lip player and I don’t believe Kell was either. Double lip was never taught in England as far as I know. Going back to Lazarus and indeed Willman.
This really opened my eyes about reeds and the French embouchure. Thank you so much for this!!
I learned Joe Allard's embouchure technique from a former student of his and this seems to give the benefit of double-lip embouchure while using single lip, so I don't have to bother with covering my upper teeth. I was able to stop covering my lower teeth too, which I had been doing. It solved a number of other problems too.
I use Polymorphus material, which becomes soft when heated in hot water, then I make an overlay on the lower and upper teeth, after a minute when it cools it hardens and becomes very durable, it turns out to be a kind of mouthguard that can be reused many times. If you didn’t succeed the first time, you can repeat the heating procedure in hot water. This is more practical for those who do not have straight teeth, since on the inside it takes the shape of the teeth, and on the outside a smooth, level area. In Russia it costs pennies.

Thank you for your help William. I do use PTFE Thread Seal Tape. It seems to me it does stick to teeth better. It last very long and is not toxic. I follow the same process as you do: size, scissors, water, shaping. Thank you, as always for sharing your priceless experience.
I am glad to see this comment as I have some on hand, and was worried about corner folds cutting at the edges of the embouchure.
Thanks you for all the videos, which are fascinating - and entertaining! Although you sort of cover this, I am struggling to reconcile your strong, repeated emphasis on not biting down and having a relaxed embouchure when using the double lip method with the apparent risk of cutting your lip/gum, which to me implies significant tooth pressure on the inside of the lip/gum.
My go to of choice for protecting my upper lip from my upper teeth is 1" wide floral tape. I have not had success with narrower versions of this product, but at 1", it is wide enough to cover both front top teeth. It then becomes a matter of user preference regarding how many times to fold it over on itself for thickness/comfort. Like the PTFE Seal tape mentioned prior it is stick and takes the shape of a player's teeth, remaining in place.
Thank you Mr. Ridenour. I am a fan of you! keep the good work
I use the EZO denture pads ... made of gauze that is saturated with paraffin. You have to cut small pieces and there is some waste. It comes in various thicknesses. Lasts for many days ... Your local drug store may not stock these, but available on-line.
I'll check it out...paraffin...Hmmmmm.
I believe EZO is no longer made. I tried finding it recently, and everyone was out of stock. Boxes on ebay are $50-80. For one box.
Dearest Tom I have been playing clarinet for 5yrs on my own and most of my education has come from your videos. i very quickly started playing with the pops orch, the chattanooga clarinet choir here in Tennessee and some other local groups...About 8or 9 months ago i stumbled on double lip and the quality of my sound and articulation have moved me forward at an accelerated pace... i would love to be able to set up a time to consult with you privately on the subject.....( please advise on your availability and fee)....... ROY
Your info is very useful!
Ok, so I can play double lip with the clarinet resting on my knee. This took a while. I can't go much above G5, and when I get tired high notes get flat, but I'm making progress.
Here's what I want to know Tom. How now do I transition into no longer resting the instrument on my knee so I can play double lip embouchure standing up---or might this never happen as players like Harold Wright soloed while sitting down.
Thanks.
Take notice that is the high notes are flat, is because of the reed and tongue position! You must see Tom videos explaining how to fix reeds
I was told Gervase de Peyer used that embouchure. My teacher in secondary school shared that many years ago.
Lots of great double lip players. Reginald Kell was the most famous among the English.
Gervase wasn’t a double lip player and I don’t believe Kell was either. Double lip was never taught in England as far as I know. Going back to Lazarus and indeed Willman.
Is it similar to an oboist's embouchure?
Yes! Very
who came up with the idea of playing the clarinet with your teeth ???