caulk and sealant manufacturers

GE, Dupont, Dap and Dow Chemical are the biggest manufacturers of caulk and sealant products.

Other caulk and sealant manufacturers include some new Chinese, Indian and other Asian companies.
See for instance Alibaba Asian Caulk Manufacturers

GE silicones

GE silicones are excellent and often considered the best. GE doesn't offer other air sealing products (just silicones).

Since silicone is ideal for bathrooms and kitchens, and around faucets, water pipes, drains, or in ceiling and plumbing fixtures, consider GE silicones for such air sealing projects.

See: Air Sealing Caulks and Silicones.

Dupont Caulks and sealants

Dupont has a wider offer than GE. Their product lines include several types of caulks and sealants, many undoubtedly good or very good.

DAP Caulks and Sealants

Dap is a major reference as a caulk manufacturer. Like Dupont their range of caulks involve silicones but also many other types of caulks.

Dow Chemical Air Sealing products

Dow Chemical caulks involve an extensive line of caulk foams called Great Stuff. Their foams can replace many traditional caulks either in small and larger openings, holes and gaps. Dow doesn't have silicone, latex, acrylic and other common caulks, but their foams are very versatile.

Where to buy caulks and sealants

Most of the above mentioned air sealants and caulks are sold in big retailers (Home Depot, Lowe's, etc.) and also online at Amazon.com.

See:
Dow Foams in Amazon
Dap caulks and sealants in Amazon
Dupont caulks and sealants in Amazon
GE Silicones in Amazon