SILAPRENE® North America’s Premier™ Adhesive/Sealant

1 of 20 products in this brand
SILAPRENE® North America’s Premier™ Adhesive/Sealant is an exceptional one-part product that combines ease of application, versatility of use, high ultimate strength, permanent bonds and long service life. N.A.P. Adhesive/Sealant is a high-quality, high-solids elastomeric sealant that provides superior adhesion to a variety of surfaces, and its bond strength improves with age.

Chemical Family: Polychloroprenes

Product Type: 1K (1 component) Adhesive, 1K (1 component) Sealant

Application Method: Gun

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

Features: Acid Resistant, Chemical Resistant, Chipping Resistance, Crack Resistant, Fast Drying, Good Weather Fastness, Peel Resistance, Water Resistant

Technical Data Sheet
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Enhanced TDS

Identification & Functionality

Features & Benefits

Applications & Uses

Application Method
Compatible Substrates & Surfaces
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 adhesive.

Method of application:

  • N.A.P. Adhesive/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 suitable equipment for handling this material.
  • Apply a bead of N.A.P. Adhesive/Sealant to one surface at temperatures above 40°F. When used as a sealant, the applied bead will shrink approximately 50%, so no tooling is necessary for most applications. The bead surface will be tack free in 15 - 45 minutes, depending on ambient conditions.Initial set time is 4 hours, after which parts may be handled.
  • When used as an adhesive between two non-porous surfaces, solvent must escape through the edges of the bond line.
  • Clamping, taping or use of mechanical fasteners to hold parts in place until Adhesive/Sealant develops strength is recommended. After 24 hours at room temperature, the product is considered self-holding. The use of a heat lamp at 150° F for 1 hour will speed solvent evaporation and accelerate strength build-up.
  • An alternative technique is to apply product to one surface, press the two surfaces to be bonded together to ensure adhesive transfer, separate parts and allow to air dry 10 - 20 minutes, then press back together with good pressure.
  • N.A.P. Adhesive/Sealant is formulated for room temperature curing, and curing is initiated when a majority of the solvent has been evacuated from the bond line. Strength build-up is very fast in the early stages to give high holding power, with continued strength build-up over time.
  •  Lower solids and viscosity grades of N.A.P. Adhesive/Sealant are available for alternative applications where better flow characteristics are required. These versions of the product are suitable for trowelling or brushing, and can be pumped through lower power equipment, including Plews guns.

Cleaner and thinner: Toluene


Soluble in
Environmental Properties
ValueUnitsTest Method / Conditions
Slump ResistanceGood--
Creep ResistanceExcellent--
Ozone ResistanceExcellent--
RES Hardness (Day cure)65 - 14--
Typical Properties
ValueUnitsTest Method / Conditions
Solid Content50.0%-
Weight per Gallon9.2lb-
Specific Gravity1.1--
Temperature Range- 60 - 250°F-
ViscosityPaste extrusion grade--
UV Range

No effect, 3000 hours with intermittent water spray every 30 minutes

Regulatory & Compliance

Certifications & Compliance

Safety & Health

Precautionary Data

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.

  • Keep away from children.
  • Keep container closed when not in use
  • Store closed container under 80°F.
  • This product contains a toxic chemical subject to the reporting requirements of Section 313 of the Emergency Planning and Community Right-to-Known act of 1986 and 40 CFR 372.