SeamStitch Acrylic Caulk


SeamStitch Acrylic Caulk is a white, water-based, brush grade acrylic elastomeric caulk.


It can be used to stop roof leaks, seal sheet metal fasteners, seams, laps and flashings prior to the application of acrylic elastomeric roof coatings.


  • Superior adhesion to various substrates.
  • Excellent weatherability and UV resistance. Provides a durable, weather resistant, long lasting seal.
  • Easy to use, non-toxic and VOC-compliant.


  • Ready to use. Thinning is not necessary. Mix well before using.
  • Mix well before using.Do not use on ponding water locations.
  • Roof must be clean, dry and free of any oil, grease, dirt or loosely adhered coating.
  • Bare surfaces must be prepared and checked for compatibility.
  • Follow our roof restoration procedures and always perform an adhesion test.
  • Equipment: putty knife, bulk loader.
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Caution: This product is water-based product which will freeze and become unusable at temperatures below 32°F. Suspend all application if conditions prevent a complete cure before sunset, rain, fog, dew or freezing temperatures. Lexis Coatings must be completely dry before exposing to water or foot traffic. Keep Lexis Coatings containers covered when not in use. Dispose of all containers in accordance with state and local environmental regulations. Keep away from children. If ingested, DO NOT induce vomiting. Call physician immediately.

Product information contained herein are presented in good faith and believed to be reliable. They do not constitute part of our terms and conditions of sale. It is also not a guarantee, either expressed or implied, that the data are correct or that products described are merchantable or fit for a particular purpose as methods of use are beyond our control. Customer should determine the suitability of our materials and installation recommendations before usage. Manufacturer’s sole responsibility shall be to replace that portion of any product that proved to be defective.

SeamStitch Acrylic Caulk

Technical Data

Property Value Test Method
Application Temperature55°F (and rising) - 100°F.
Less than 85% relative humidity.
Clean UpWater
Packaging5 gallon pail
Density11.2 ± 0.2 pounds/gallon
Dry TimeDry to touch in 4 - 6 hours.
12 - 24 hours to recoat.
Depending on humidity and moisture.
Elongation315% ±50ASTM D-412
Flash PointNone
Hardness45 shore A
Impact resistanceexceeds 160b in/lb
Permeability0.14 perms/centASTM E-96
Tensile Strength500 psi ± 50ASTM D-412
Shelf Life12 months @ 40°F-90°F
Service Temperature-50°F to 200°F
Solids by Weight68% ±2%ASTM D-1644
Viscosity60,000 ± 25,000 cPBrookfield
VOC<35 grams/liter