FLEX SEAL^®CONSTRUCTION ADHESIVE

POWERFUL PERFORMANCE FOR EVERY PROJECT.

Flex Seal Construction Adhesive delivers professional bonding power across every job type—from everyday fixes to structural builds. Available in three performance levels, each formula provides exceptional strength, durability, and versatility, engineered to handle the toughest indoor and outdoor conditions.

Hybrid adhesive performance for everyday jobs.

Flex Seal Heavy Duty Construction Adhesive delivers hybrid adhesive performance for everyday jobs—outperforming traditional latex adhesives in both strength and durability. Perfect for home repairs and small construction projects, it’s paintable, easy to apply, and withstands extreme conditions indoors and outdoors.

Strong & Durable
Fast Grab Formula
Paintable & Easy to Apply
Weather-Resistant Bond

Usage Instructions:

Ensure surfaces are clean, dry, and free of debris.
Cut nozzle to desired bead size.
Apply adhesive in a continuous bead to one side of surface.
Press materials together firmly.
Remove excess adhesive with a damp cloth before it cures.

Warning icon WARNING: California Proposition 65 Notice.

Professional-grade bonding for demanding conditions.

Flex Seal Advanced Construction Adhesive is engineered for professional-grade performance. This high-strength hybrid formula bonds to a wide variety of materials—even in wet or extreme conditions—making it the go-to choice for contractors and advanced DIYers. It fills gaps, holds heavy materials, and is formulated to last.

Super Strong, Flexible & Durable
Won’t Shrink or Crack
Bonds Wet or Dry Surfaces
Works Underwater
Paintable
Works Indoors & Outdoors
Withstands Extreme Weather
Instant Grab Formula
Freeze & Thaw Resistant
Fills Gaps

Usage Instructions:

Ensure surfaces are clean and free of debris.
Cut nozzle to desired bead size.
Apply a continuous bead to one side of surface.
Press surfaces together firmly.
For overhead or heavy applications, provide support until fully cured.
Clean uncured adhesive with mineral spirits or solvent; cured adhesive must be cut or scraped.

Warning icon WARNING: California Proposition 65 Notice.

Maximum bonding strength and extreme durability.

Flex Seal Extreme Construction Adhesive is our most powerful formula—built for structural jobs and demanding environments. It features maximum bonding strength, instant grab formulation, and all-weather durability. Flexible and paintable, it withstands extreme weather conditions and even works underwater—the best choice for heavy-duty projects where failure is not an option.

Structural-Grade Bond Strength
Vertical & Overhead Hold
Won’t Shrink or Crack
Withstands Extreme Weather
Works Underwater
Bonds Wet or Dry Surfaces
Indoor & Outdoor Use
Flexible & Paintable
Fills Gaps
Freeze & Thaw Resistant
Maximum Strength & Durability
Instant Grab Formula

Usage Instructions:

Ensure surfaces are clean and ready for bonding.
Cut nozzle to desired bead size.
Apply a strong, even bead to one side of surface.
Position materials immediately and press firmly together.
For structural applications, follow building codes and guidelines.
Allow 24–48 hours to fully cure, depending on temperature and humidity.
Remove uncured adhesive with solvent; cured adhesive must be mechanically removed.

Warning icon WARNING: California Proposition 65 Notice.

New Products

Flex Seal Adhesive Remover

Flex Seal Draft Tape

Flex Tape Mini Strips

Flex Seal Epoxy

Flex Seal Power Putty

Flex Seal Wall Repair Kit

Flex Seal Super Bags

Flex Seal Construction Adhesive