SILAPRENE® DC12718 al weather sealant is a one-part self-leveling, solvent-release product that combines excellent weather, UV, and ozone resistance with ease of application to provide a long service life. It is a high-quality, high-solids elastomeric sealant that provides superior adhesion to a variety of surfaces.

Product Type: 1K (1 component) Sealant, Elastomeric Sealant, Solventborne Sealant

Compatible Substrates & Surfaces: Acrylonitrile Butadiene Styrene (ABS), Concrete, Epoxies, Glass, Masonry, Metal, Phenolics, Plastics, Plywood, Polyesters, Polyolefins, Polyurethane, Wood

Application Method: Extrusion, Trowel

Chemical Family: Ethylene-Propylene-Diene Copolymers (EPDM)

Features: Chipping Resistance, Crack Resistant, Fast Drying, Good Leveling Properties, Good UV Resistance, Good Weather Fastness, Moisture Resistant, Ozone Resistant, Peel Resistance, Tack-free, Water Resistant

Technical Data Sheet
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Enhanced TDS

Identification & Functionality

Features & Benefits

Applications & Uses

Application Method
Application Instructions

Preparation of substrates:

  • Surfaces to be bonded should be cleaned of all dust, oils or other contaminates. A solvent wipe is often adequate. 
  • Bonds to rigid surfaces are usually improved by a solvent wipe followed with light abrasion (180 grit) and solvent wiping to remove abrasive residue. Dry surfaces thoroughly before applying sealant.

Method of application:

  • DC12718 All Weather Sealant can be applied by ordinary caulking guns or pressure pumping equipment. Pumping equipment should be of the follower-plate type and have a pump ratio of at least 40:1. Aro, Binks, Devilbiss, Graco and Lincoln all produce satisfactory equipment for handling this material.
  • Apply a bead of DC12718 All Weather Sealant to surface at temperatures above 40°F. The applied bead will self level and shrink approximately 30%, so no tooling is necessary for most applications. The bead surface will be tack free in 15 - 45 minutes, depending on ambient conditions.

Cleaner and thinner: Naphtha


Soluble in
Typical Properties
ValueUnitsTest Method / Conditions
Solid Content67.0%-
ViscosityPaste extrusion grade--
Weight per Gallon9.1lb-
Specific Gravity1.09--
Temperature Range- 65 - 210°F-

Safety & Health


This product is extremely flammable. Vapors may form an explosive mixture with air. Precautions should be taken to keep product away from fire, sparks, motors and other sources of heat or flame. Turn off or deactivate any electrical equipment or sources of ignition. Adequate ventilation is required to keep vapor concentrations below the Threshold Limit Value.

  • For professional or industrial use only.
  • Keep away from children.
  • Keep container closed when not in use
  • To maximize shelf life store below 80°F
  • This product contains toxic chemicals subject to the reporting requirements of Section 313 of the Emergency Planning and Community Right-to-Know act of 1986 and 40CFR372.