believe it or not I use tire plug material that has the sticky already on it. just lay it across and trim to fit , never had a leak even on my blower motors.
WOW,, NEVER THOUGHT OF A TIRE PLUG MATERIAL,, HUMMMM, BUT I STILL LIKE GOOD OL PERMATX. OR HOW EVER YOU SPELL IT,,
when you take the intake off , you just peel it off. .
I can't take credit for it though , I was at races when I saw someone else do it and was surprised how well it worked..you can buy a card with a dozen on it at most parts houses. , works great , no mess...Paul