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High-performance rubberized caulk and sealant. No caulk gun needed.
Ditch The Caulk Gun
Flex Caulk is a high-performance rubberized caulk and sealant with an innovative Adjustable Trigger Flow Nozzle™ that allows you to control the flow for precise, mess-free application. No caulk gun needed.

Windows

Baseboards

Bathrooms

Kitchens

Bathrooms

Kitchens

Windows

Baseboards

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100% WATERPROOF & WEATHERPROOF

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DURABLE & LASTS FOR YEARS

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FULLY PAINTABLE & VIRTUALLY ODORLESS (hYBRID ONLY)

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CHEMICAL, UV, & MILDEW RESISTANT

Two Powerful Formulas.
Same Easy Application.
Flex Caulk Being Applied On Doorway

Flex Caulk™ Hybrid

The go-to caulk for strong adhesion, bonding power, versatility, and paintability.

  • Red Checkmark Icon Perfect for general home repairs – Use on windows, doors, siding, trim, roofing, and more.
  • Red Checkmark Icon Works in challenging conditions – Can be applied to wet surfaces—even underwater!
  • Red Checkmark Icon Ideal for porous and non-porous surfaces – Works on wood, drywall, brick, stone, masonry, metal, ceramic, PVC, and more.
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Flex Caulk Being Applied On Doorway

Flex Caulk™ Silicone

Your best choice for sealing areas exposed to moisture, movement, and extreme conditions.

  • Red Checkmark Icon Ideal for wet and humid areas – Perfect for kitchens, baths, sinks, showers, tubs, and plumbing fixtures.
  • Red Checkmark Icon Great for exterior sealing – Performs well on windows, doors, and siding exposed to harsh weather.
  • Red Checkmark Icon Best for smooth, non-porous materials – Bonds well to glass, metal, ceramic, and PVC.
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Red Quotation Marks
Yellow Five Stars
Easy to use!

"We just moved in a house build in the 50s, and it probably hasn't been updated since then! This caulk came in so handy sealing/fixing the baseboard in the home..."

Kerrie
Review Courtesy of Bazaarvoice
Flex Caulk Baseboards Application
Red Quotation Marks
Yellow Five Stars
No caulk gun needed!

"Used this to recaulk my sliding door where it was coming separated slightly. This has done a great job holding it. I love how easily it blends with the rest of the material..."

Amanda
Review Courtesy of Bazaarvoice
Flex Caulk Door Application
Red Quotation Marks
Yellow Five Stars
Love the all-in-one system.

"Definitely Easier to use! Love that it’s waterproof, mildew resistant and paintable. I can touch up all the spots around our house that needs extra coverage since we built..."

Vika
Review Courtesy of Bazaarvoice
Flex Caulk Bathroom Application
Red Quotation Marks
Yellow Five Stars
Easiest caulking option on the market!

"This Flex Caulk is great. I love that you don’t need a caulking gun for this. It is easy to apply and adheres very well. It doesn’t take too long to dry and I feel that it will last for a long time..."

Kirby
Review Courtesy of Bazaarvoice
Flex Caulk Kitchen Application
Frequently Asked Questions
Find answers to questions about Flex Caulk, its uses, and applications.

Start Caulking
the Easy way.

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Start Caulking
the Easy way.

SHOP NOW