3MScotch 2228 Rubber Mastic Electrical Tape 5.1 cm x 3 m Black Self-Fusing Rubber Tape for Insulating and Sealing - 1 Roll

Great product. A bit expensive but there’s plenty supplied. Easy to shape/cut and sticks down well.

Got this excellent black tape for mtb frame protection. I highly recommend 2228, was easy to apply. I used one box (£20) and cut strips and fitted side by side. It is maluble to seal together. Covered underside of all the bike frame, to protect against stone chips. Used on down tube and chain stay. Not bothered about weight of tape. Might be a pain to get off, but I will be putting new on.

Was looking for something to protect my new mountain bike frame from chain slap,heard about 3m mastic but struggled to find any at first..... Plenty of unbranded options around but reviews mentioned the tape not sticking on the edges.Well after cutting it to shape, wiping the paintwork with brake cleaner, I applied it with ease to mould it around my chainstay, follows all the contours and sticks like s@#& to a blanket!..... Very happy with my choice

Bought this to protect my bike's chainstain and I've also used it to protect the cranks ends. It's very easy to apply and seems ideal for the job. Only put 4*due to the price (£24 for a roll).

Very sticky to seal off the electrical joint to prevent moisture and also I used it on my Mtb for chain stay protection.

Fit it around the bottom bracket area to protect against stones.

used for chainstay protector on bike, better than expected, helps me have a quiet bike again.It sticks well and is very stretchy, left unstretched as a cushion for the chain and stretched round a couple of cables to tidy them, as a bit of a tape freak I can honestly say this stuff is great to have at hand.

This seems to do the job nicely. I've used it as a frame protector on my mountain bike at the chain stay. Goes on easily and sticks very well. I can't see it coming off.

Amazing how versatile this thing is, using it as chain protection and also as a cover for my bicycle rear link to avoid mud, rocks and sticks from getting into link area. Tape flexibility is great and haven't had any issues if it starts to peel just replace. Great purchase and will be buying more for sure.

Excellent product, works great for sealing wiring harnesses against salt, water and corrosion

Do not buy it!

Compré esta cinta de goma para proteger el cuadro de mi bicicleta donde la cadena lo golpea. La cinta es de goma gruesa, pero se aplica fácilmente a superficies irregulares como esta. No es barato, pero los protectores de cadena también pueden ser caros. Usando esto, puedo hacer tamaños personalizados y proteger otras áreas de mi bicicleta.

I almost always solder electrical connections and this stuff makes a waterproof seal and is easier to apply than shrink tubing. It seems to vulcanize to itself when wrapped and is rather hard to get off wiring when that is needed. That's OK, I want something that works well. I use it to also wrap some hose clamps for looks and to avoid chafing. Tons of uses so I carry it in my work truck and fun buggy. I just cut off a small strip, peel off the paper and stretch it before applying. EZ and effective.